Monthly Notices of the Royal Astronomical Society最新文献_第2页

Inferring the iron K emissivity profiles of accretion discs irradiated by extended coronae 推断受扩展日冕照射的吸积盘的铁K发射率曲线

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-11 DOI: 10.1093/mnras/stae1714

Wenda Zhang, M. Dovvciak, M. Bursa, Jivr'i Svoboda, V. Karas

{"title":"Inferring the iron K emissivity profiles of accretion discs irradiated by extended coronae","authors":"Wenda Zhang, M. Dovvciak, M. Bursa, Jivr'i Svoboda, V. Karas","doi":"10.1093/mnras/stae1714","DOIUrl":"https://doi.org/10.1093/mnras/stae1714","url":null,"abstract":"\u0000 One of the most promising methods to measure the spin of an accreting black hole is fitting the broad iron Kα line in the X-ray spectrum. The line profile also depends on the geometry of the hard X-ray emitting corona. To put constraints on the black hole spin and corona geometry, it is essential to understand how do they affect the iron Kα line emissivity profile. In this work, we present calculations of the illumination and the iron Kα emissivity profiles performed with the Monte-Carlo GR radiative transfer code Monk. We focus on distinction between the illumination and emissivity profiles, which is in most previous studies neglected. We show that especially for the case of black hole X-ray binaries (BHXRBs), the difference is very large. For active galactic nuclei (AGNs), the emissivity profile has a more similar shape as the illumination profile, but it is notably steeper in the innermost region within a few gravitational radii. We find out that the different behavior between AGN and black hole X-ray binary discs is due to the different energy spectra of the illuminating radiation. This suggests that the emissivity profile of the iron Kα line cannot be determined by black hole spin and corona geometry alone and the energy spectrum of the illuminating radiation has to be taken into account. We also examined the effect of including the self-irradiation, and find it to be more important than the corona emission in BHXRBs.","PeriodicalId":506975,"journal":{"name":"Monthly Notices of the Royal Astronomical Society","volume":"135 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141656260","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

Correction to: Determining star-formation rates in active galactic nuclei hosts via stellar population synthesis 更正：通过恒星群合成确定活动星系核宿主的恒星形成率

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-05 DOI: 10.1093/mnras/stae1592

R. Riffel, N. Mallmann, G. S. Ilha, T. Storchi-Bergmann, R. Riffel, S. Rembold, D. Bizyaev, Janaina C do Nascimento, J. Schimoia, L. D. da Costa, N. Boardman, M. Boquien, G. Couto

引用次数: 0

Correction to: The binding of cosmological structures by massless topological defects 更正：无质量拓扑缺陷对宇宙学结构的束缚

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-05 DOI: 10.1093/mnras/stae1647

引用次数: 0

Correction to: Detecting strongly lensed type Ia supernovae with LSST 更正：用LSST探测强透镜Ia型超新星

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-05 DOI: 10.1093/mnras/stae1662

引用次数: 0

Correction to: Resolving cosmic star formation histories of present-day bulges, discs, and spheroids with P ro F use 更正：利用P ro F解析现今暴体、圆盘和球体的宇宙恒星形成史

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-05 DOI: 10.1093/mnras/stae1665

S. Bellstedt, A. Robotham, S. Driver, Claudia Lagos, L. J. Davies, R. H. W. Cook

引用次数: 0

Correction to: Gamma-ray observations of MAXI J1820+070 during the 2018 outburst 更正：2018年爆发期间对MAXI J1820+070的伽马射线观测

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-05 DOI: 10.1093/mnras/stae1630

引用次数: 0

Optical and H i observations of IC 443 and G189.6 + 3.3 in a complex environment 在复杂环境中对 IC 443 和 G189.6 + 3.3 进行光学和 H i 观测

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-05 DOI: 10.1093/mnras/stae1653

H. Bakış, G. Paylı, E. Aktekin, H. Sano, A. Sezer

引用次数: 0

Properties of supernova remnants in SIGNALS galaxies – I. NGC 6822 and M33 SIGNALS 星系中超新星残余的特性 - I. NGC 6822 和 M33

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-07-01 DOI: 10.1093/mnras/stae1641

S. Puertas, L. Drissen, C. Robert, L. Rousseau-Nepton, R. Martin, Philippe Amram, Thomas P. Martin

引用次数: 0

Unveiling stellar aurorae: Simulating auroral emission lines in hot stars induced by high-energy irradiation 揭开恒星极光的面纱：模拟高能辐照诱发的炽热恒星极光发射线

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-05-16 DOI: 10.1093/mnras/stae1273

Michal Kajan, J. Krtička, J. Kubát

{"title":"Unveiling stellar aurorae: Simulating auroral emission lines in hot stars induced by high-energy irradiation","authors":"Michal Kajan, J. Krtička, J. Kubát","doi":"10.1093/mnras/stae1273","DOIUrl":"https://doi.org/10.1093/mnras/stae1273","url":null,"abstract":"\u0000 Auroral emission lines result from the interaction between magnetic field and stellar wind, offering valuable insights into physical properties and processes occurring within magnetospheres of celestial bodies. While extensively studied in planetary and exoplanetary atmospheres, in ultra-cool dwarfs, and as radio emission from early-type stars, the presence of specific auroral emission lines in hot star spectra remains unexplored. In this study, we utilized TLUSTY code to simulate the auroral lines, while modelling the effect of the interaction between stellar wind and magnetosphere through X-ray irradiation. Utilizing high-resolution synthetic spectra generated from model atmospheres, we identified potential candidate lines indicative of auroral emission, which were absent in non-irradiated spectra. Emission lines in synthetic spectra were present primarily in the infrared domain. The most prominent line generated by irradiation was He ii 69458 Å, which appeared in all our model atmospheres with effective temperatures ranging from 15 kK to 30 kK. We also calculated the minimum irradiation required to detect emission in this most prominent line. The presence of emission lines was interpreted by considering changes in the population of different excited states of given atoms. Besides the appearance of infrared emission lines, high-energy irradiation causes infrared excess. To complement our simulations, we also searched for auroral lines in Far Ultraviolet Spectroscopic Explorer (FUSE) observations, which are deposited in the Multimission Archive at Space Telescope (MAST) catalogue. The comparison of observed spectra with synthetic spectra did not identify any possible candidate emission lines in FUSE spectra.","PeriodicalId":506975,"journal":{"name":"Monthly Notices of the Royal Astronomical Society","volume":"30 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140968352","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 first low-mass eclipsing binary within the fully convective zone from TMTS 从TMTS观测到的完全对流区内的首个低质量食双星

Monthly Notices of the Royal Astronomical Society Pub Date : 2024-05-16 DOI: 10.1093/mnras/stae1266

Cheng Liu, Xiaofeng Wang, Xiaobin Zhang, Mikhail Kovalev, Jie Lin, G. Xi, Jun Mo, Gaici Li, Haowei Peng, Xin Li, Qiqi Xia, A. Iskandar, Xiangyun Zeng, Letian Wang, Liying Zhu, Xuan Song, Jincheng Guo, Xiaojun Jiang, Shengyu Yan, Jicheng Zhang

{"title":"The first low-mass eclipsing binary within the fully convective zone from TMTS","authors":"Cheng Liu, Xiaofeng Wang, Xiaobin Zhang, Mikhail Kovalev, Jie Lin, G. Xi, Jun Mo, Gaici Li, Haowei Peng, Xin Li, Qiqi Xia, A. Iskandar, Xiangyun Zeng, Letian Wang, Liying Zhu, Xuan Song, Jincheng Guo, Xiaojun Jiang, Shengyu Yan, Jicheng Zhang","doi":"10.1093/mnras/stae1266","DOIUrl":"https://doi.org/10.1093/mnras/stae1266","url":null,"abstract":"\u0000 We present a comprehensive photometric and spectroscopic analysis of the short-period (∼5.32 hours) and low-mass eclipsing binary TMTSJ0803 discovered by Tsinghua-Ma Huateng Telescope for Survey (TMTS). By fitting the light curves and radial velocity data with the Wilson–Devinney code, we find that the binary is composed of two late spotted active M dwarfs below the fully convective boundary. This is supported by the discovery of a significant Balmer emission lines in the LAMOST spectrum and prominent coronal X-ray emission. In comparison with the typical luminosity of rapidly rotating fully convective stars, the much brighter X-ray luminosity (LX/Lbol = 0.0159 ± 0.0059) suggests the stellar magnetic activity of fully convective stars could be enhanced in such a close binary system. Given the metallicity of [M/H] = − 0.35 dex as inferred from the LAMOST spectrum, we measure the masses and radii of both stars to be M1 = 0.169 ± 0.010 M⊙, M2 = 0.162 ± 0.016 M⊙, R1 = 0.170 ± 0.006 R⊙, and R2 = 0.156 ± 0.006 R⊙, respectively. Based on the luminosity ratio from the light curve modeling, the effective temperatures of two components are also estimated. In comparison with the stellar evolution models, the radii and effective temperatures of two components are all below the isochrones. The radius deflation might be mainly biased by a small radial velocity (RV) data or (and) a simple correction on RVs, while the discrepancy in effective temperature might be due to the enhanced magnetic activity in this binary.","PeriodicalId":506975,"journal":{"name":"Monthly Notices of the Royal Astronomical Society","volume":"35 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140971567","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