干旱区生态环境知识资源中心(Arid): ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert

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DOI	10.1051/0004-6361/202039937
	ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert
	Palle, E.; Luque, R.; Zapatero Osorio, M. R.; Parviainen, H.; Ikoma, M.; Tabernero, H. M.; Zechmeister, M.; Mustill, A. J.; Bejar, V. S. J.; Narita, N.; Murgas, F.
通讯作者	Palle, E (corresponding author), Inst Astrofis Canarias IAC, Tenerife 38200, Spain. ; Palle, E (corresponding author), Univ La Laguna ULL, Dept Astrofis, Tenerife 38206, Spain.
来源期刊	ASTRONOMY & ASTROPHYSICS
ISSN	0004-6361
EISSN	1432-0746
出版年	2021
卷号	650
英文摘要	The TESS mission has reported a wealth of new planetary systems around bright and nearby stars amenable for detailed characterizations of planet properties and atmospheres. However, not all interesting TESS planets orbit around bright host stars. TOI-263 b is a validated ultra-short-period substellar object in a 0.56-day orbit around a faint (V = 18.97) M 3.5 dwarf star. The substellar nature of TOI-263 b was explored using multicolor photometry: a true radius of 0.87 +/- 0.21 R-J was determined, establishing TOI-263 b 's nature as somewhere between an inflated Neptune and a brown dwarf. The orbital period-radius parameter space occupied by TOI-263 b is quite unique, which prompted a further characterization of its true nature. Here, we report radial velocity measurements of TOI-263 obtained with three VLT units and the ESPRESSO spectrograph to retrieve the mass of TOI-263 b. We find that TOI-263 b is a brown dwarf with a mass of 61.6 +/- 4.0 M-Jup. Additionally, the orbital period of the brown dwarf is found to be synchronized with the rotation period of the host star, and the system is found to be relatively active, possibly revealing a star-brown dwarf interaction. All these findings suggest that the system's formation history might be explained via disk fragmentation and a later migration to close-in orbits. If the system is found to be unstable, TOI-263 will be an excellent target to test the migration mechanisms before the brown dwarf becomes engulfed by its parent star.
英文关键词	instrumentation: spectrographs techniques: radial velocities brown dwarfs planets and satellites: formation planets and satellites: fundamental parameters planets and satellites: individual: TOI-263b
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000661576300002
WOS关键词	ECLIPSING BINARY ; TRANSITING EXOPLANETS ; EVOLUTIONARY MODELS ; PLANET OCCURRENCE ; ERROR-CORRECTION ; SELF-CONSISTENT ; GIANT PLANETS ; STARS ; SYSTEM ; ARCHITECTURE
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/2XILL650/349601
作者单位	[Palle, E.; Luque, R.; Parviainen, H.; Bejar, V. S. J.; Narita, N.; Murgas, F.] Inst Astrofis Canarias IAC, Tenerife 38200, Spain; [Palle, E.; Luque, R.; Parviainen, H.; Bejar, V. S. J.; Murgas, F.] Univ La Laguna ULL, Dept Astrofis, Tenerife 38206, Spain; [Zapatero Osorio, M. R.] Ctr Astrobiol CSIC INTA, Carretera Ajalvir Km 4, Madrid 28850, Spain; [Ikoma, M.] Univ Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan; [Tabernero, H. M.] Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal; [Zechmeister, M.] Georg August Univ, Inst Astrophys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany; [Mustill, A. J.] Lund Univ, Dept Astron & Theoret Phys, Lund Observ, Box 43, S-22100 Lund, Sweden; [Narita, N.] Univ Tokyo, Komaba Inst Sci, Meguro Ku, 3-8-1 Komaba, Tokyo 1538902, Japan; [Narita, N.] JST, PRESTO, Meguro Ku, 3-8-1 Komaba, Tokyo 1538902, Japan; [Narita, N.] Astrobiol Ctr, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
推荐引用方式 GB/T 7714	Palle, E.,Luque, R.,Zapatero Osorio, M. R.,et al. ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert[J],2021,650.
APA	Palle, E..,Luque, R..,Zapatero Osorio, M. R..,Parviainen, H..,Ikoma, M..,...&Murgas, F..(2021).ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert.ASTRONOMY & ASTROPHYSICS,650.
MLA	Palle, E.,et al."ESPRESSO mass determination of TOI-263b: an extreme inhabitant of the brown dwarf desert".ASTRONOMY & ASTROPHYSICS 650(2021).