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New era of LSST data: Estimating the physical properties of main-sequence galaxies LSST数据的新时代:估计主序星系的物理性质
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921322004793
G. Riccio
{"title":"New era of LSST data: Estimating the physical properties of main-sequence galaxies","authors":"G. Riccio","doi":"10.1017/S1743921322004793","DOIUrl":"https://doi.org/10.1017/S1743921322004793","url":null,"abstract":"Abstract The main goal of the Vera C. Rubin observatory is to perform the 10 year Legacy Survey of Space and Time (LSST). This future state-of-art observatory will open the new window to study billions of galaxies from Local Universe as well as the high redshift objects. In this work we employ simulated LSST observations and uncertainties, based on the 50 385 real galaxies within the redshift range 0 < z < 2.5 from the ELAIS-N1 and COSMOS fields of the Herschel Extragalactic Legacy Project (HELP) survey, to constrain the physical properties of normal star-forming galaxies, such as their star formation rate (SFR), stellar mass (Mstar), and dust luminosity (Ldust). We fit their spectral energy distributions (SEDs) using the Code Investigating GALaxy Emission (CIGALE). The stellar masses estimated based on the LSST measurements agree with the full UV to far-IR SED, while we obtain a clear overestimate of the dust-related properties (SFR, Ldust) estimated with LSST. We investigate the cause of this result and find that it is necessary to employ auxiliary rest-frame mid-IR observations, simulated UV observations, or the far-UV attenuation (AFUV)-Mstar relation to correct for the overestimate.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"2 1","pages":"271 - 274"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85408679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Revealing the Relation between Star Formation Activity of Jellyfish Galaxies and Ram Pressure Stripping 揭示水母星系恒星形成活动与公羊压力剥离的关系
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921323000303
Jeong Hwan Lee, M. Lee, Jae Yeon Mun, Brian S. Cho, Jisu Kang
{"title":"Revealing the Relation between Star Formation Activity of Jellyfish Galaxies and Ram Pressure Stripping","authors":"Jeong Hwan Lee, M. Lee, Jae Yeon Mun, Brian S. Cho, Jisu Kang","doi":"10.1017/S1743921323000303","DOIUrl":"https://doi.org/10.1017/S1743921323000303","url":null,"abstract":"Abstract Jellyfish galaxies are starburst galaxies with ram-pressure-stripped tails and blue star-forming knots. These galaxies show a snapshot of star formation enhancement triggered by ram pressure stripping (RPS), being important targets for studying the RPS-induced star formation in gas-rich galaxies. Here we investigate the star formation activity of five jellyfish galaxies in massive clusters, using Gemini GMOS/IFU observations. From the Hα-derived star formation rates (SFRs), we find that our sample shows higher SFR excess to the star formation main sequence than the jellyfish galaxies in low-mass clusters. From the compiled sample of jellyfish galaxies in low-mass to high-mass host clusters, we suggest that the star formation activity of jellyfish galaxies has positive correlations with host cluster mass and degree of RPS. These relationships imply that higher ram pressure environments tend to trigger stronger starbursts in jellyfish galaxies in the early stage of RPS.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"94 1","pages":"132 - 135"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80620488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Variable metallicity yields as tracers of inflows 作为流入示踪剂的可变金属丰度产率
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921322003982
A. Camps-Fariña, P. Sánchez-Blázquez, S. Roca-Fàbrega, S. Sánchez
{"title":"Variable metallicity yields as tracers of inflows","authors":"A. Camps-Fariña, P. Sánchez-Blázquez, S. Roca-Fàbrega, S. Sánchez","doi":"10.1017/S1743921322003982","DOIUrl":"https://doi.org/10.1017/S1743921322003982","url":null,"abstract":"Abstract Pristine gas accretion is expected to be the main driver of sustained star formation in galaxies. We measure the required amount of accreted gas at each moment over a galaxy’s history to produce the observed metallicity at that time given its star-forming history. More massive galaxies tend to have higher accretion rates and a larger drop of the accretion rate towards the present time. Within the same mass bin galaxies that are currently star-forming or in the Green Valley have similar, sustained, accretion histories while retired galaxies had a steep decline in the past. Plotting the T80 of the individual accretion histories, a measure of how sustained they are, versus the stellar mass and current sSFR we see a distribution such that currently star-forming galaxies have sustained or recent accretion and retired galaxies have declined accretion histories.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"26 1","pages":"246 - 248"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81423107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stellar wind from low-mass main-sequence stars: an overview of theoretical models 来自低质量主序星的恒星风:理论模型概述
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S174392132300025X
M. Shoda
{"title":"Stellar wind from low-mass main-sequence stars: an overview of theoretical models","authors":"M. Shoda","doi":"10.1017/S174392132300025X","DOIUrl":"https://doi.org/10.1017/S174392132300025X","url":null,"abstract":"Abstract The stellar wind from low-mass stars affects the evolution of the whole stellar system in various ways. To better describe its quantitative contributions, we need to understand the theoretical aspects of stellar wind formation. Here, we present an overview of the theoretical models of stellar wind. The classical thermally-driven wind model fails in reproducing the anti-correlation between the coronal temperature and wind speed observed in the solar wind, thus needs modification with magnetic-energy injection. Specifically, energy input by Alfvén wave is likely to be important. Indeed, a number of solar-wind observations are well reproduced by the Alfvén-wave models, although it could be risky to directly apply the Alfvén-wave models to general low-mass stars. For a better description of stellar wind from low-mass stars with a variety of activity levels, the hybrid model would be better, in which we consider the effect of flux emergence as well as Alfvén wave.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"23 1","pages":"122 - 129"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86332049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The JWST/NIRSpec GTO programme “The Physics of Galaxy Assembly: IFS observations of high-z galaxies” JWST/NIRSpec GTO项目“星系物理学汇编:高z星系的IFS观测”
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S174392132200374X
Michele Perna
{"title":"The JWST/NIRSpec GTO programme “The Physics of Galaxy Assembly: IFS observations of high-z galaxies”","authors":"Michele Perna","doi":"10.1017/S174392132200374X","DOIUrl":"https://doi.org/10.1017/S174392132200374X","url":null,"abstract":"Abstract We present an overview of the project “The Physics of Galaxy Assembly: IFS observations of high-z galaxies”, a Guaranteed Time Observations (GTO) programme of the James Webb Space Telescope (JWST). It an ambitious project aimed at investigating the internal structure of distant galaxies with the NIRSpec integral field spectrograph (IFS), having allocated 273 hours of JWST prime time. The NIRSpec capability will provide us with spatially resolved spectroscopy in the 1-5 μm range of a sample of over forty galaxies and Active Galactic Nuclei in the redshift range 3 < z < 9. IFS observations of individual galaxies will enable us to investigate in detail the most important physical processes driving galaxy evolution across the cosmic epoch. More in detail, the main specific objectives are: to trace the distribution of star formation, to map the resolved properties of the stellar populations, to trace the gas kinematics (i.e. velocity fields, velocity dispersion) and, hence, determine dynamical masses and also identify non-virial motions (outflow and inflows), and to map metallicity gradients and dust attenuation.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"15 1","pages":"60 - 62"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87431341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Star Formation History of Two Fields in the Halo of NGC 5128 ngc5128光晕中两个区域的恒星形成历史
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921322003908
Sima T. Aghdam, A. Javadi, S. Hashemi, J. V. van Loon, H. Khosroshahi, R. H. Golshan, E. Saremi, M. Saberi
{"title":"Star Formation History of Two Fields in the Halo of NGC 5128","authors":"Sima T. Aghdam, A. Javadi, S. Hashemi, J. V. van Loon, H. Khosroshahi, R. H. Golshan, E. Saremi, M. Saberi","doi":"10.1017/S1743921322003908","DOIUrl":"https://doi.org/10.1017/S1743921322003908","url":null,"abstract":"Abstract NGC 5128 galaxy is a giant elliptical galaxy located in the Centaurus group of galaxies at 3.8 Mpc. We aim to study the star formation history (SFH) of two different fields of the galaxy. The northeastern field (Field 1) is located at a distance of 18.8 kpc, while the southern field (Field 2) is at 9.9 kpc. We use a photometric method that is based on identifying long period variable (LPV) stars and asymptotic giant branch (AGB) stars, as they are strong tracers of star formation and galaxy evolution due to their luminosity and variability; 395 LPVs in Field 1 and 671 LPVs in Field 2 have been identified. These two fields present similar SFHs, although the SF rate of Field 2 is more enhanced. We find that the galaxy has three major star formation episodes t ∼ 800 Myr ago, t ∼ 3.2 Gyr ago, and t ∼ 10 Gyr ago, where t is look-back time. The rate of star formation at ∼ 800 Myr ago agrees with previous studies suggesting that the galaxy experienced a merger around that time. Furthermore, NGC 5128 has experienced a lower star formation rate in its recent history which could have been driven by jet-induction star formation and multiple outbursts of AGN activity in this galaxy, as well as a minor merger around 400 Myr ago.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"11 1","pages":"306 - 309"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89084096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Formation of the Stellar System and the Central Gravitation-Potential Vessel of Galaxies 恒星系统的形成和星系中心引力势容器
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921322003829
K. Kodaira, V. Kalinova
{"title":"Formation of the Stellar System and the Central Gravitation-Potential Vessel of Galaxies","authors":"K. Kodaira, V. Kalinova","doi":"10.1017/S1743921322003829","DOIUrl":"https://doi.org/10.1017/S1743921322003829","url":null,"abstract":"Abstract The formation of the global stellar system of galaxies are studied through the circular velocity curves of CALIFA nearby galaxies by sequencing the depth and size of the central gravitation-potential vessel and its dynamical mass, relative to the masses of the stellar system and of the parent halo, with the population or age parameters, to explore the dynamical characteristics of the dissipative contracting baryonic matter.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"6 1","pages":"128 - 131"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81113883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diverse Star Formation History in Presence of Cold-Mode Gas Accretion: From Solar Neighborhood to Distant Galaxies 存在冷模式气体吸积的不同恒星形成历史:从太阳附近到遥远星系
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921322004811
M. Noguchi
{"title":"Diverse Star Formation History in Presence of Cold-Mode Gas Accretion: From Solar Neighborhood to Distant Galaxies","authors":"M. Noguchi","doi":"10.1017/S1743921322004811","DOIUrl":"https://doi.org/10.1017/S1743921322004811","url":null,"abstract":"Abstract Existence of cold-mode gas accretion along with the hot-mode accretion of the shock-heated gas can explain the bimodality in the elemental abundance of the Milky Way disk stars as well as the mass-dependence of galaxy morphology represented by mass ratios of thin disks, thick disks, and bulges.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"49 1","pages":"322 - 324"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90920956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Size Evolution and Orbital Architecture of KEPLER Small Planets through Giant Impacts and Photoevaporation 通过巨大撞击和光蒸发，开普勒小行星的大小演化和轨道结构
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921322003970
P. Gu, Matsumoto Yuji, Kokubo Eiichiro, Kurosaki Kenji
{"title":"Size Evolution and Orbital Architecture of KEPLER Small Planets through Giant Impacts and Photoevaporation","authors":"P. Gu, Matsumoto Yuji, Kokubo Eiichiro, Kurosaki Kenji","doi":"10.1017/S1743921322003970","DOIUrl":"https://doi.org/10.1017/S1743921322003970","url":null,"abstract":"Abstract The KEPLER transit survey with follow-up spectroscopic observations has discovered numerous small planets (super-Earths/sub-Neptunes) and revealed intriguing features of their sizes, orbital periods, and their relations between adjacent planets. The planet size distribution exhibits a bimodal distribution separated by a radius gap at around 1.8 Earth radii. Besides, these small planets within multiple planetary systems show that adjacent planets are similar in size and their period ratios of adjacent planet pairs are similar as well, a phenomenon often dubbed as peas-in-a-pod in the exoplanet community. While the radius gap has been predicted and theorized for years, whether it can be relevant to the orbital architecture peas-in-a-pod is physically unknown. For the first time, we attempted to model both features together through planet formation and evolution processes involving giant impacts and photoevaporation. We showed that our model is generally consistent with the KEPLER results but with a smaller radius gap. The impact of Kubyshikina’s model for photoevaporation on our model is discussed.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"5 1","pages":"251 - 256"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73613422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gas-Star Formation Cycle in Nearby Galaxies 邻近星系中的气体恒星形成周期
Proceedings of the International Astronomical Union Pub Date : 2021-08-01 DOI: 10.1017/S1743921322003763
H. Pan, E. Schinnerer, A. Hughes, A. Leroy, B. Groves
{"title":"Gas-Star Formation Cycle in Nearby Galaxies","authors":"H. Pan, E. Schinnerer, A. Hughes, A. Leroy, B. Groves","doi":"10.1017/S1743921322003763","DOIUrl":"https://doi.org/10.1017/S1743921322003763","url":null,"abstract":"Abstract Star formation, from cold giant molecular clouds to diverse population of stars, is a complex process involving a wide variety of physical processes. In this work, we constrain the link between the gas-star formation cycle and several secular and environmental probe of galaxies. Specifically, we quantify the spatial correlation between molecular gas and star-forming regions for 49 nearby galaxies using the ALMA and narrowband-Hα imaging from the PHANGS survey. At the resolution (150 pc) at which the individual molecular clouds and star-forming regions can be identified, we find that molecular clouds and star-forming regions do not necessarily coexist. The decoupled molecular clouds and star-forming regions are a signature of evolutionary cycling and feedback of the star formation process. Therefore, the impact of galactic-scale conditions and environments must be considered for a complete understanding of how stars form in galaxies and how this process influences the evolution of the host galaxies.","PeriodicalId":20590,"journal":{"name":"Proceedings of the International Astronomical Union","volume":"31 1","pages":"105 - 110"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74430059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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