干旱区生态环境知识资源中心(Arid): The B-Star Exoplanet Abundance Study: a co-moving 16-25 M-Jup companion to the young binary system HIP 79098

Arid

DOI	10.1051/0004-6361/201935687
	The B-Star Exoplanet Abundance Study: a co-moving 16-25 M-Jup companion to the young binary system HIP 79098
	Janson, Markus 1; Asensio-Torres, Ruben 1; Andre, Damien 1; Bonnefoy, Mickael 2; Delorme, Philippe 2; Reffert, Sabine 3; Desidera, Silvano 4; Langlois, Maud 5; Chauvin, Gael 2,6,7; Gratton, Raffaele 4; Bohn, Alexander J.8; Eriksson, Simon C.1; Marleau, Gabriel-Dominique 9; Mamajek, Eric E.10,11; Vigan, Arthur 12; Carson, Joseph C.13
通讯作者	Janson, Markus
来源期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
EISSN	1432-0746
出版年	2019
卷号	626
英文摘要	Wide low-mass substellar companions are known to be very rare among low-mass stars, but appear to become increasingly common with increasing stellar mass. However, B-type stars, which are the most massive stars within similar to 150 pc of the Sun, have not yet been examined to the same extent as AFGKM-type stars in that regard. In order to address this issue, we launched the ongoing B-star Exoplanet Abundance Study (BEAST) to examine the frequency and properties of planets, brown dwarfs, and disks around B-type stars in the Scorpius-Centaurus (Sco-Cen) association; we also analyzed archival data of B-type stars in Sco-Cen. During this process, we identified a candidate substellar companion to the B9-type spectroscopic binary HIP 79098 AB, which we refer to as HIP 79098 (AB)b. The candidate had been previously reported in the literature, but was classified as a background contaminant on the basis of its peculiar colors. Here we demonstrate that the colors of HIP 79098 (AB)b are consistent with several recently discovered young and low-mass brown dwarfs, including other companions to stars in Sco-Cen. Furthermore, we show unambiguous common proper motion over a 15-yr baseline, robustly identifying HIP 79098 (AB)b as a bona fide substellar circumbinary companion at a 345 +/- 6 AU projected separation to the B9-type stellar pair. With a model-dependent mass of 16-25 M-Jup yielding a mass ratio of <1%, HIP 79098 (AB)b joins a growing number of substellar companions with planet-like mass ratios around massive stars. Our observations underline the importance of common proper motion analysis in the identification of physical companionship, and imply that additional companions could potentially remain hidden in the archives of purely photometric surveys.
英文关键词	brown dwarfs stars: early-type planets and satellites: detection
类型	Article
语种	英语
国家	Sweden ; France ; Germany ; Italy ; Chile ; Netherlands ; USA
开放获取类型	Green Submitted, Bronze
收录类别	SCI-E
WOS记录号	WOS:000472022700006
WOS关键词	BROWN DWARF DESERT ; LOW-MASS STARS ; EVOLUTIONARY MODELS ; ROTATIONAL VELOCITIES ; POPULATION ; PLANETS ; SPECTROSCOPY ; MEMBERS ; NAOS ; 1ST
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214429
作者单位	1.Stockholm Univ, Dept Astron, Stockholm, Sweden; 2.Univ Grenoble Alpes, IPAG, Grenoble, France; 3.Heidelberg Univ, Zentrum Astron, Landessternwarte, Heidelberg, Germany; 4.INAF Osservatorio Astron Padova, Padua, Italy; 5.Univ Lyon, CNRS, CRAL, St Genis Laval, France; 6.Univ Chile, CNRS INSU, Unidad Mixta Int Franco Chilena Astron, Santiago, Chile; 7.Univ Chile, Dept Astron, Santiago, Chile; 8.Leiden Univ, Leiden Observ, Leiden, Netherlands; 9.Eberhard Karls Univ Tubingen, Inst Astron & Astrophys, Tubingen, Germany; 10.CALTECH, Jet Prop Lab, Pasadena, CA USA; 11.Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA; 12.Aix Marseille Univ, LAM, CNRS, Marseille, France; 13.Coll Charleston, Charleston, SC 29401 USA
推荐引用方式 GB/T 7714	Janson, Markus,Asensio-Torres, Ruben,Andre, Damien,et al. The B-Star Exoplanet Abundance Study: a co-moving 16-25 M-Jup companion to the young binary system HIP 79098[J],2019,626.
APA	Janson, Markus.,Asensio-Torres, Ruben.,Andre, Damien.,Bonnefoy, Mickael.,Delorme, Philippe.,...&Carson, Joseph C..(2019).The B-Star Exoplanet Abundance Study: a co-moving 16-25 M-Jup companion to the young binary system HIP 79098.ASTRONOMY & ASTROPHYSICS,626.
MLA	Janson, Markus,et al."The B-Star Exoplanet Abundance Study: a co-moving 16-25 M-Jup companion to the young binary system HIP 79098".ASTRONOMY & ASTROPHYSICS 626(2019).