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Hidden Companions to Intermediate-mass Stars. XX. Discovery of a 0.58M ⊙, 7.4 au Companion to p Puppis 中质量恒星的隐藏伴星。XX.发现 p Puppis 的 0.58M ⊙, 7.4 au 伴星
Research notes of the AAS Pub Date : 2024-06-14 DOI: 10.3847/2515-5172/ad5724
I. Waisberg, Y. Klein, B. Katz
{"title":"Hidden Companions to Intermediate-mass Stars. XX. Discovery of a 0.58M ⊙, 7.4 au Companion to p Puppis","authors":"I. Waisberg, Y. Klein, B. Katz","doi":"10.3847/2515-5172/ad5724","DOIUrl":"https://doi.org/10.3847/2515-5172/ad5724","url":null,"abstract":"p Puppis is a nearby 3.1M ⊙ B8V star with astrometric evidence for a close companion in addition to its two wide companions at 1.3 kau (a white dwarf (WD)) and 38.7 kau (an F2V astrometric binary). Here we report on a VLTI/GRAVITY observation that revealed the close companion to be a 0.58M ⊙ star at a projected separation ρ = 100.2 mas ↔ 7.4 au, confirming the system to be a quintuple. The discovered companion explains the X-ray emission of p Pup detected by eROSITA. Moreover, we also find that the isochrone age of 100−20+50  Myr of p Pup is incompatible with the minimum cooling age of 350 Myr for the 1.3 kau wide WD companion, suggesting that either they are not coeval or that the WD was formed through a non-trivial channel.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"52 49","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141345265","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
Discovery of the Blazhko-type Effect in the HADS Star V965 Cep 在 HADS 星 V965 Cep 中发现布拉兹科型效应
Research notes of the AAS Pub Date : 2024-06-13 DOI: 10.3847/2515-5172/ad567a
M. Y. Pyatnytskyy, I. Andronov
{"title":"Discovery of the Blazhko-type Effect in the HADS Star V965 Cep","authors":"M. Y. Pyatnytskyy, I. Andronov","doi":"10.3847/2515-5172/ad567a","DOIUrl":"https://doi.org/10.3847/2515-5172/ad567a","url":null,"abstract":"We derived additional pulsation frequencies in the HADS star V965 Cep from the frequency analysis of the O − C diagram built with the TESS Quick-Look Pipeline (QLP) data and from the TESS QLP light curve. Thus, the star appeared to be a multi-mode pulsator with a modulated light curve, similar to RR Stars with the Blazhko effect.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"15 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141347600","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
ASKAP-EMU Discovery of New Galactic SNR Candidate: Unicycle (G312.65+2.87) ASKAP-EMU发现新的银河 SNR 候选者：Unicycle (G312.65+2.87)
Research notes of the AAS Pub Date : 2024-06-13 DOI: 10.3847/2515-5172/ad5309
Zachary J. Smeaton, M. D. Filipović, B. Koribalski, S. Lazarević, R. Alsaberi, Werner Becker, K. Dage, Yjan A. Gordon, Andrew M. Hopkins, R. Kothes, D. Leahy, Ana Mitras̆inović
{"title":"ASKAP-EMU Discovery of New Galactic SNR Candidate: Unicycle (G312.65+2.87)","authors":"Zachary J. Smeaton, M. D. Filipović, B. Koribalski, S. Lazarević, R. Alsaberi, Werner Becker, K. Dage, Yjan A. Gordon, Andrew M. Hopkins, R. Kothes, D. Leahy, Ana Mitras̆inović","doi":"10.3847/2515-5172/ad5309","DOIUrl":"https://doi.org/10.3847/2515-5172/ad5309","url":null,"abstract":"We present the serendipitous discovery of a low surface brightness Galactic supernova remnant candidate, Unicycle (G312.65+2.87). Unicycle was initially discovered in the Evolutionary Map of the Universe large-scale radio survey at 943.5 MHz. We measure a diffuse shell (D = 288″ × 300″) and an integrated flux density of S I 944 MHz = 150 ± 20 mJy. We estimate the most likely intrinsic diameters of 30 < D < 36 pc or 42 < D < 47 pc, corresponding to distances of 10 < d < 12 kpc or 14 < d < 16 kpc, placing it within either the Scutum–Centaurus or outer Sagittarius spiral arms.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"91 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141347730","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 the Abundance of Mercury from the Hg ii Line at 5677.10 Å in Late B-type Stars. II. HD 143807 and HD 16727 通过 B 型晚期恒星中位于 5677.10 Å 处的 Hg ii 线确定汞的丰度。II.HD 143807 和 HD 16727
Research notes of the AAS Pub Date : 2024-06-12 DOI: 10.3847/2515-5172/ad55f5
R. Monier
{"title":"Determination of the Abundance of Mercury from the Hg ii Line at 5677.10 Å in Late B-type Stars. II. HD 143807 and HD 16727","authors":"R. Monier","doi":"10.3847/2515-5172/ad55f5","DOIUrl":"https://doi.org/10.3847/2515-5172/ad55f5","url":null,"abstract":"The weak line of Hg ii located at 5677.10 Å is used to measure the mercury abundance in two HgMn stars, HD 143807 (ι CrB) and HD 16727 (11 Per). This line is detected at 3σ above the noise in the adjacent continuum in HD 143807 but not detected in HD 16727. The synthesis of this line, using the current atomic parameters available in NIST, confirms the large overabundance of mercury in HD 143807, about +4.60 dex, in very good agreement with the excess derived in earlier studies from the 3983.93 Å line. At the overabundance expected for HD 16727 (3.90 dex), the line is predicted to contribute a 1% absorption feature which is not seen in the observed spectrum.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"31 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353755","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
An Independent Discovery of the 1946 Eruption of the Recurrent Nova T Coronae Borealis and an Early Prediction of a Future Outburst 独立发现 1946 年新星 T Coronae Borealis 的喷发，以及对未来爆发的早期预测
Research notes of the AAS Pub Date : 2024-06-12 DOI: 10.3847/2515-5172/ad566b
J. H. Shears
{"title":"An Independent Discovery of the 1946 Eruption of the Recurrent Nova T Coronae Borealis and an Early Prediction of a Future Outburst","authors":"J. H. Shears","doi":"10.3847/2515-5172/ad566b","DOIUrl":"https://doi.org/10.3847/2515-5172/ad566b","url":null,"abstract":"One of the earliest independent discoveries of the 1946 eruption of the recurrent nova T CrB was by British amateur variable star observer, N.F.H. Knight, on 1946 February 9 at 05.40 UT. Correspondence between Knight and W.M. Lindley, the Director of the British Astronomical Association Variable Star Section, reveals what might be the first prediction of a future eruption in 2026–27.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"122 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141351625","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
Probing Shocked Ejecta in SN 1987A with XRISM-Resolve: The Effects of the Gate Valve Closed 用XRISM-Resolve探测SN 1987A中的冲击喷出物：关闭闸阀的影响
Research notes of the AAS Pub Date : 2024-06-11 DOI: 10.3847/2515-5172/ad55f6
Vincenzo Sapienza, Marco Miceli, Aya Bamba, Salvatore Orlando, Shiu-Hang Lee, Shigehiro Nagataki, Masaomi Ono, Satoru Katsuda, Koji Mori, Makoto Sawada, Yukikatsu Terada, Roberta Giuffrida and Fabrizio Bocchino
{"title":"Probing Shocked Ejecta in SN 1987A with XRISM-Resolve: The Effects of the Gate Valve Closed","authors":"Vincenzo Sapienza, Marco Miceli, Aya Bamba, Salvatore Orlando, Shiu-Hang Lee, Shigehiro Nagataki, Masaomi Ono, Satoru Katsuda, Koji Mori, Makoto Sawada, Yukikatsu Terada, Roberta Giuffrida and Fabrizio Bocchino","doi":"10.3847/2515-5172/ad55f6","DOIUrl":"https://doi.org/10.3847/2515-5172/ad55f6","url":null,"abstract":"Supernova (SN) 1987A is widely regarded as an excellent candidate for leveraging the capabilities of the freshly launched XRISM satellite. Recent researches indicate that the X-ray emission from SN 1987A will increasingly originate from its ejecta in the years to come. In a previous study, we thoroughly examined the proficiency of XRISM-Resolve in identifying signatures of shocked ejecta in SN 1987A, synthesizing the XRISM-Resolve spectrum based on a state-of-the-art magneto-hydrodynamic simulation. However, following the satellite’s launch, a technical issue arose with the XRISM instrument’s gate valve, which failed to open, thereby affecting observations with the Resolve spectrometer. Here, we update our analysis, reevaluating our diagnostic approach under the assumption that the gate valve remains closed. We find that, even with the reduced instrumental capabilities, it will be possible to pinpoint the ejecta contribution through the study of the line profiles in the XRISM-Resolve spectrum of SN 1987A.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"85 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524960","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
SKYSURF-5: Probing the Integrated Galaxy Light with a SDSS-SKYSURF Cross-matched Catalog SKYSURF-5：利用SDSS-SKYSURF交叉匹配目录探测综合星系光
Research notes of the AAS Pub Date : 2024-06-10 DOI: 10.3847/2515-5172/ad54c8
Purvansh Bhatia, T. Carleton, R. Windhorst, R. Jansen, Rosalia O’Brien
{"title":"SKYSURF-5: Probing the Integrated Galaxy Light with a SDSS-SKYSURF Cross-matched Catalog","authors":"Purvansh Bhatia, T. Carleton, R. Windhorst, R. Jansen, Rosalia O’Brien","doi":"10.3847/2515-5172/ad54c8","DOIUrl":"https://doi.org/10.3847/2515-5172/ad54c8","url":null,"abstract":"Project SKYSURF aims to account for the difference between observed integrated background light levels and those expected from galaxy-count measurements using archival Hubble Space Telescope (HST) images. Due to the scarcity of bright objects in a typical HST field of view, Poisson uncertainty and Cosmic Variance can significantly hinder calculations of the total integrated background light from galaxies. Since the existing SKYSURF analysis cannot constrain bright galaxy counts well, we catalog the bright object number density by cross-matching SKYSURF pointings with objects in the Sloan Digital Sky Survey. Here, we present the cross-matched catalogs and measure the distribution of integrated galaxy light from the SDSS objects. We find a median integrated light level in the r-band of 2.45 nW m−2 sr−1, consistent with previous findings given the level of incompleteness in SDSS and suggesting that SKYSURF pointings are in general not substantially biased toward object-rich fields on the sky.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141363359","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
Deep HST Imaging Favors the Bulgeless Edge-on Galaxy Explanation for the Hypothetical Stellar Wake Created by a Runaway Supermassive Black Hole 对失控超大质量黑洞产生的假想恒星漩涡，HST 深度成像更倾向于 "无边缘星系 "的解释
Research notes of the AAS Pub Date : 2024-06-03 DOI: 10.3847/2515-5172/ad530b
Mireia Montes, Jorge Sánchez Almeida and Ignacio Trujillo
{"title":"Deep HST Imaging Favors the Bulgeless Edge-on Galaxy Explanation for the Hypothetical Stellar Wake Created by a Runaway Supermassive Black Hole","authors":"Mireia Montes, Jorge Sánchez Almeida and Ignacio Trujillo","doi":"10.3847/2515-5172/ad530b","DOIUrl":"https://doi.org/10.3847/2515-5172/ad530b","url":null,"abstract":"A long linear structure recently discovered could be the stellar wake produced by the passage of a runaway supermassive black hole (SMBH) or, alternatively, a bulgeless edge-on galaxy. We report on new very deep Hubble Space Telescope imaging that seems to be in tension with the SMBH runaway scenario but is consistent with the bulgeless edge-on galaxy scenario. The new observations were aimed at detecting two key features expected in the SMBH scenario, namely, the bow shock formed where the SMBH meets the surrounding medium, and a counter stellar wake created by another binary SMBH hypothesized as part of the ejection mechanism. Neither of these two features appears to be present in the new images, as would be expected in the edge-on galaxy scenario.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255972","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
Gaia DR3 Data of Very Young Open Cluster NGC 6530: Distance and Evolutionary Stage of Selected Stars 非常年轻的疏散星团 NGC 6530 的 Gaia DR3 数据：部分恒星的距离和演化阶段
Research notes of the AAS Pub Date : 2024-06-03 DOI: 10.3847/2515-5172/ad530a
Mudumba Parthasarathy
{"title":"Gaia DR3 Data of Very Young Open Cluster NGC 6530: Distance and Evolutionary Stage of Selected Stars","authors":"Mudumba Parthasarathy","doi":"10.3847/2515-5172/ad530a","DOIUrl":"https://doi.org/10.3847/2515-5172/ad530a","url":null,"abstract":"Gaia EDR3 and Gaia DR3 data of selected stars in the very young (1.5 million years old) open cluster NGC 6530 are presented. All the selected stars have very accurate Gaia DR3 distances. Most of the selected stars are very young B stars and several of them are young stellar objects. From the analysis of selected stars, the distance to NGC 6530 is found to be 1318 pc. The two very red stars VAJ 304 and 338 have little bit less proper motion than other members of the NGC 6530 and their Mv values are found to be −3.57 and −3.68 respectively. They are much brighter than K5 III RGB stars and less luminous than massive K5 red supergiants. It is likely VAJ 304 and VAJ 338 are not members of NGC 6530 they may be field K5 type AGB or post-AGB stars. Further study of these two stars is needed.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141256301","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
Progenitor Stars Calculated with Small Reaction Networks should not be Used as Initial Conditions for Core Collapse 用小型反应网络计算的原初恒星不应作为核心坍缩的初始条件
Research notes of the AAS Pub Date : 2024-06-03 DOI: 10.3847/2515-5172/ad530e
M. Renzo, J. A. Goldberg, A. Grichener, O. Gottlieb and M. Cantiello
{"title":"Progenitor Stars Calculated with Small Reaction Networks should not be Used as Initial Conditions for Core Collapse","authors":"M. Renzo, J. A. Goldberg, A. Grichener, O. Gottlieb and M. Cantiello","doi":"10.3847/2515-5172/ad530e","DOIUrl":"https://doi.org/10.3847/2515-5172/ad530e","url":null,"abstract":"Core collapse initial conditions are a bottleneck in understanding the explosion mechanism(s) of massive stars. Stellar evolution codes struggle after carbon burning, and either stop or adopt numerical simplifications missing crucial physics. The use of small nuclear reaction networks (NRN) that account for energy production but bypass weak reactions is typical, but insufficient to study the dynamics of the collapse. We advise against the use of progenitors computed with small NRN in expensive multidimensional simulations of core collapse, bounce, (jet formation), and explosion.","PeriodicalId":74684,"journal":{"name":"Research notes of the AAS","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141256122","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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