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Galaxy Zoo: Morphologies Based on UKIDSS NIR Imaging for 71,052 Galaxies 星系动物园：基于 UKIDSS 71,052 个星系的近红外成像的形态学
Research notes of the AAS Pub Date : 2024-08-16 DOI: 10.3847/2515-5172/ad6f10
Karen L. Masters, Melanie Galloway, Lucy Fortson, Chris J. Lintott, Mike Read, Claudia Scarlata, Brooke Simmons, Mike Walmsley, Kyle Willett
{"title":"Galaxy Zoo: Morphologies Based on UKIDSS NIR Imaging for 71,052 Galaxies","authors":"Karen L. Masters, Melanie Galloway, Lucy Fortson, Chris J. Lintott, Mike Read, Claudia Scarlata, Brooke Simmons, Mike Walmsley, Kyle Willett","doi":"10.3847/2515-5172/ad6f10","DOIUrl":"https://doi.org/10.3847/2515-5172/ad6f10","url":null,"abstract":"We present morphological classifications based on Galaxy Zoo analysis of 71,052 galaxies with imaging from the United Kingdom Infrared Telescope Infrared Deep Sky Survey (UKIDSS). Galaxies were selected out of the Galaxy Zoo 2 (GZ2) sample, so also have <italic toggle=\"yes\">gri</italic> imaging from the Sloan Digital Sky Survey. An identical classification tree, and vote weighting/aggregation was applied to both UKIDSS and GZ2 classifications enabling direct comparisons. With this Research Note we provide a public release of the GZ:UKIDSS morphologies and discuss some initial comparisons with GZ2.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"163 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218020","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 Coronal Lines of the High-excitation, Fe ii-type Nova V2467 Cygni 高激发铁ii型新星V2467 Cygni的日冕线
Research notes of the AAS Pub Date : 2024-08-16 DOI: 10.3847/2515-5172/ad6e78
Richard J. Rudy, Ray W. Russell, Michael L. Sitko, David K. Lynch, Charles E. Woodward
{"title":"The Coronal Lines of the High-excitation, Fe ii-type Nova V2467 Cygni","authors":"Richard J. Rudy, Ray W. Russell, Michael L. Sitko, David K. Lynch, Charles E. Woodward","doi":"10.3847/2515-5172/ad6e78","DOIUrl":"https://doi.org/10.3847/2515-5172/ad6e78","url":null,"abstract":"Optical and infrared spectra are presented for the nova V2467 Cygni from the period of its maximum excitation. The spectra indicate exceptionally high excitation for a Fe <sc>ii</sc>-type nova, exhibiting [Si <sc>x</sc>] 1.4305 <italic toggle=\"yes\">μ</italic>m and several emission lines that we associate with C <sc>vi</sc>. Along with numerous coronal features, V2467 Cygni also displayed low-excitation nebular lines. A CLOUDY analysis indicates a temperature of 5.5 × 10<sup>5</sup> for its exciting source, a very heterogeneous emission line region, and an ejected mass ≥1.5 × 10<sup>−4</sup> <italic toggle=\"yes\">L</italic>\u0000<sub>☉</sub>.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227094","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
Illumination of a Planet by a Black Hole Moon as a Technological Signature 黑洞月球照亮行星的技术特征
Research notes of the AAS Pub Date : 2024-08-16 DOI: 10.3847/2515-5172/ad6e7a
Abraham Loeb
{"title":"Illumination of a Planet by a Black Hole Moon as a Technological Signature","authors":"Abraham Loeb","doi":"10.3847/2515-5172/ad6e7a","DOIUrl":"https://doi.org/10.3847/2515-5172/ad6e7a","url":null,"abstract":"I show that Hawking radiation from a mini black hole with a mass of ∼10<sup>11</sup> g in a low orbit around an otherwise frozen rogue planet, can supply the energy needs of a civilization on the surface of the planet. Maintaining this furnace for more than a few years requires a modest accretion rate of ∼2 kg s<sup>−1</sup>. The associated technosignature is detectable as a gamma-ray source occulted by a warm planet every 1–2 hr, with no stellar-mass companion.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142218021","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
Hidden Companions to Intermediate-mass Stars. XXI. Discovery of a 0.5 M ⊙, 1.5 au Companion to Sadachbia = Gamma Aquarii* 中质量恒星的隐藏伴星。XXI.发现萨达赫比亚=宝瓶座伽马星*的 0.5 M ⊙, 1.5 au 伴星
Research notes of the AAS Pub Date : 2024-08-06 DOI: 10.3847/2515-5172/ad6b26
Idel Waisberg, Ygal Klein and Boaz Katz
{"title":"Hidden Companions to Intermediate-mass Stars. XXI. Discovery of a 0.5 M ⊙, 1.5 au Companion to Sadachbia = Gamma Aquarii*","authors":"Idel Waisberg, Ygal Klein and Boaz Katz","doi":"10.3847/2515-5172/ad6b26","DOIUrl":"https://doi.org/10.3847/2515-5172/ad6b26","url":null,"abstract":"Sadachbia = Gamma Aquarii is a nearby A0V star that was suspected to be a spectroscopic binary. Here we report on the direct detection of a companion with a K band flux ratio of 1.2% at a projected separation of 38.2 mas based on a VLTI/GRAVITY near-infrared interferometric observation. The implied mass and separation of the companion are 0.46 M⊙ and 1.5 au based on the Gaia DR3 distance (or 0.55 M⊙ and 1.9 au if the discrepant Hipparcos distance is used instead). The companion explains the X-ray emission of γ Aqr and the orbital motion with a period of about one year likely explains the discrepant Gaia and Hipparcos parallaxes. Further observations are necessary to measure the binary semimajor axis but it is likely that the system will undergo common envelope evolution. The primary is partially resolved with an angular diameter of 0.52 mas.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942499","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
Multicolor Photometry of the Be/X-Ray Pulsar IGR J06074+2205 贝/X射线脉冲星IGR J06074+2205的多色光度测量
Research notes of the AAS Pub Date : 2024-08-06 DOI: 10.3847/2515-5172/ad6b2d
Paul Schmidtke, Tim Hunter and Anne Cowley
{"title":"Multicolor Photometry of the Be/X-Ray Pulsar IGR J06074+2205","authors":"Paul Schmidtke, Tim Hunter and Anne Cowley","doi":"10.3847/2515-5172/ad6b2d","DOIUrl":"https://doi.org/10.3847/2515-5172/ad6b2d","url":null,"abstract":"B, V, and R observations of the Be/X-ray pulsar IGR J06074+2205 were taken in 2023–2024 covering times of expected X-ray outbursts. However, no coinciding optical outbursts were found. The overall optical brightness of the system faded in all 3 filters, with the least decline being in B and the greatest in R. This suggests that a cool disk was contributing less light to the system.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942518","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
Jet-induced Enhancement of the Nova Rate in M87 射流诱发的 M87 新星率增强
Research notes of the AAS Pub Date : 2024-08-05 DOI: 10.3847/2515-5172/ad6a55
Massimo Della Valle, Allen W. Shafter and Sumner Starrfield
{"title":"Jet-induced Enhancement of the Nova Rate in M87","authors":"Massimo Della Valle, Allen W. Shafter and Sumner Starrfield","doi":"10.3847/2515-5172/ad6a55","DOIUrl":"https://doi.org/10.3847/2515-5172/ad6a55","url":null,"abstract":"We argue that the Bondi accretion mechanism has the potential to enhance classical nova production near the M87 jet. According to our estimates, the jet's influence can increase the nova rate in its vicinity by up to a factor of two over the background rate by triggering explosions on single white dwarfs. This result may offer a straightforward explanation for the recently observed excess of novae near the M87 jet.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141942517","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 Escape Probability of Photons Emitted in a Spherical Homogeneous Shell 球形均质壳中发射的光子的逃逸概率
Research notes of the AAS Pub Date : 2024-08-01 DOI: 10.3847/2515-5172/ad68f9
Eli Dwek, Richard G. Arendt
{"title":"The Escape Probability of Photons Emitted in a Spherical Homogeneous Shell","authors":"Eli Dwek, Richard G. Arendt","doi":"10.3847/2515-5172/ad68f9","DOIUrl":"https://doi.org/10.3847/2515-5172/ad68f9","url":null,"abstract":"We present a general expression for calculating the escape probability of photons from a dusty homogeneous spherical shell.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"96 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871307","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
Using the COSMIC Population Synthesis Code to Investigate How Metallicity Affects the Rates of Interacting Binaries 利用 COSMIC 群体合成代码研究金属性如何影响相互作用双星的速率
Research notes of the AAS Pub Date : 2024-07-31 DOI: 10.3847/2515-5172/ad686d
Ayanah L. Cason, Nicole Lloyd-Ronning, Roseanne Cheng
{"title":"Using the COSMIC Population Synthesis Code to Investigate How Metallicity Affects the Rates of Interacting Binaries","authors":"Ayanah L. Cason, Nicole Lloyd-Ronning, Roseanne Cheng","doi":"10.3847/2515-5172/ad686d","DOIUrl":"https://doi.org/10.3847/2515-5172/ad686d","url":null,"abstract":"We use COSMIC, a galaxy population synthesis code, to investigate how metallicity affects the rate of formation of massive stars with a closely orbiting compact object companion. Metallicity—a crucial component to stellar evolution and binary system formation—can affect how and when these systems form. We present the formation time of these systems at different metallicities, and the anti-correlation the rates have with metallicity. In particular, these systems occur about 10 times more frequently at metallicities between <italic toggle=\"yes\">Z</italic> = 2 × 10<sup>−4</sup> and 2 × 10<sup>−3</sup>, compared to those between <italic toggle=\"yes\">Z</italic> = 2 × 10<sup>−3</sup> and 2 × 10<sup>−2</sup>. This work serves as a prerequisite to predicting global rates of these systems as a function of redshift, ultimately giving crucial insight into our understanding of the progenitors of long gamma-ray bursts and their evolution over cosmic time.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141873281","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
Variability Census of Legacy Catalogs. III. 8600+ New δ Scuti and γ Doradus Stars* * Dedicated to my wife Jingyun Zhang. 遗留目录的变异性普查。III.8600+ 新δ Scuti 和γ Doradus 星* * 献给我的妻子张静云。
Research notes of the AAS Pub Date : 2024-07-31 DOI: 10.3847/2515-5172/ad686b
Ai-Ying Zhou
{"title":"Variability Census of Legacy Catalogs. III. 8600+ New δ Scuti and γ Doradus Stars* * Dedicated to my wife Jingyun Zhang.","authors":"Ai-Ying Zhou","doi":"10.3847/2515-5172/ad686b","DOIUrl":"https://doi.org/10.3847/2515-5172/ad686b","url":null,"abstract":"I present the identification of over 4600 new <italic toggle=\"yes\">δ</italic> Scuti and 4000 new <italic toggle=\"yes\">γ</italic> Doradus stars, which represent the third phase results of a variability vetting census project in BD, HD, SAO, and PPM catalogs. Across project phases I–III (scanning 468,862 catalog objects), I have identified over 9690 <italic toggle=\"yes\">δ</italic> Scuti, 7680 <italic toggle=\"yes\">γ</italic> Doradus, 2600+ Maia variables, 1030+ eclipsing binaries, 20+ RR Lyrae stars, 180+ heartbeat candidates, 9800+ rotating variables (including subtypes of 370+ ELL, 800+ ACV, 100+ SXARI, and hundreds of solar-like oscillators), and several other types as new variables. Notably, more than 120 eclipsing binary systems have been identified with pulsating primary components of either DSCT or GDOR type, while 24 more binaries feature overlapping Maia-type pulsation. Moreover, over 2200 of these variables exhibit hybrid <italic toggle=\"yes\">δ</italic> Sct-<italic toggle=\"yes\">γ</italic> Dor pulsations.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871308","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
Determination of Surface Abundances for HD 129174 (π 1 Boo) 测定 HD 129174 的表面丰度（π 1 Boo）
Research notes of the AAS Pub Date : 2024-07-31 DOI: 10.3847/2515-5172/ad686c
Richard Monier
{"title":"Determination of Surface Abundances for HD 129174 (π 1 Boo)","authors":"Richard Monier","doi":"10.3847/2515-5172/ad686c","DOIUrl":"https://doi.org/10.3847/2515-5172/ad686c","url":null,"abstract":"The synthesis of the Hg <sc>ii</sc> line at 3983.93 Å, using published hyperfine structure and nuclear shifts, confirms a large overabundance of mercury in HD 129174, about +6.18 dex, which is actually slightly larger than the excess derived in earlier studies. The synthesis of 17 other lines close to the Hg <sc>ii</sc> line and in the spectral range 4400–4500 Å yields abundances for 9 elements. Helium and iron are found to be deficient by −1.12 and −0.097 dex. Magnesium, scandium, titanium, chromium are moderately enhanced by respectively +0.30 dex (Mg) and +1.0 dex (Sc, Ti and Cr). Yttrium and zirconium are very overabundant by +4.00, +2.48 dex respectively.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871309","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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