Unveiling the infrared excess of SIPS J2045-6332: evidence for a young stellar object with potential low-mass companion

被引：0

作者：

Hyogo, Michiharu ^{[1
,2
]}

Bickle, Thomas P. ^{[3
]}

Biggs, Joseph R. ^{[1
]}

Burgasser, Adam J. ^{[4
]}

Caselden, Dan ^{[5
]}

Casewell, Sarah ^{[6
]}

Dieterich, Sergio B. ^{[6
]}

Luca, Hugo A. Durantini ^{[1
,2
,7
]}

Faherty, Jacqueline ^{[5
]}

Gagliuffi, Daniella Bardalez ^{[8
]}

Gagne, Jonathan ^{[9
,10
]}

Kirkpatrick, J. Davy ^{[11
]}

Kuchner, Marc J. ^{[12
]}

Lisse, Carey M. ^{[11
,13
]}

Marocco, Federico ^{[11
]}

Meisner, Aaron M. ^{[14
]}

Rothermich, Austin ^{[5
,15
]}

Schneider, Adam C. ^{[16
]}

Silverberg, Steven M. ^{[17
]}

机构：

[1] Disk Detect, Washington, DC 20546 USA

[2] Backyard Worlds Planet 9, Tucson, AZ 85719 USA

[3] Open Univ, Sch Phys Sci, Milton Keynes MK7 6AA, Bucks, England

[4] Univ Calif San Diego, Dept Astron & Astrophys, La Jolla, CA 92093 USA

[5] Amer Museum Nat Hist, Dept Astrophys, Cent Pk West & 79th St, New York, NY 10024 USA

[6] Univ Leicester, Ctr Exoplanet Res, Sch Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England

[7] UNC Famaf, Ave Medina Allende S-N,Ciudad Univ,X5000HUA, Cordoba, Argentina

[8] Amherst Coll, Dept Phys & Astron, 25 East Dr, Amherst, MA 01003 USA

[9] Planetarium Rio Tinto Alcan, 4801 Pierre de Coubertin Ave, Montreal, PQ H1V 3V4, Canada

[10] Univ Montreal, Inst Res Exoplanets, Dept Phys, CP 6128 Succ Ctr ville, Montreal, PQ H3C 3J7, Canada

[11] CALTECH, IPAC, Mail Code 100-22,1200 E Calif Blvd, Pasadena, CA 91125 USA

[12] NASA, Goddard Space Flight Ctr, Exoplanets & Stellar Astrophys Lab, Code 667, Greenbelt, MD 20771 USA

[13] Johns Hopkins Univ, Appl Phys Lab, 11100 Johns Hopkins Rd, Laurel, MD 20723 USA

[14] NSFs Natl Opt Infrared Astron Res Lab, 950 N Cherry Ave, Tucson, AZ 85719 USA

[15] CUNY, Grad Ctr, Dept Phys, 365 5th Ave, New York, NY 10016 USA

[16] US Naval Observ, Flagstaff Stn, 10391 West Naval Observ Rd, Flagstaff, AZ 86005 USA

[17] Smithsonian Astrophys Observ, 60 Garden Str, Cambridge, MA 01238 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2025年 / 538卷 / 02期

基金：

美国国家航空航天局;

关键词：

binaries: general; brown dwarfs; circumstellar matter; DWARF SPECTROSCOPIC SURVEY; BROWN DWARFS; DISK CANDIDATES; FOLLOW-UP; STARS; FIELD; COOL; DISCOVERY; SPECTRA; WISE;

D O I：

10.1093/mnras/staf360

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Disc Detective project, a citizen science initiative, aims to identify circumstellar discs around stars by detecting objects with infrared (IR) excess using data from the Wide-field Infrared Survey Explorer (WISE). In this study, we investigate SIPS J2045-6332, a potential brown dwarf with significant IR excess in WISE and Two Micron All Sky Survey (2MASS) bands, initially identified by project volunteers. Despite early indicators of a circumstellar disc, discrepancies between observed brightness and expected spectral energy distribution (SED) models suggested unusual properties. To explore potential explanations, we created SED templates for spectral types M9 to L4 and compared them with SIPS J2045-6332's photometric data, revealing an excess brightness that points to either an unresolved low-mass companion or a young, inflated primary star. Further analysis of IR spectral features and surface gravity indicators supports a youthful classification, estimating the object's age at 26-200 million years. Observations also suggest the presence of a mid L-type companion at a projected distance of 6.7 au. This study highlights SIPS J2045-6332 as an intriguing system with unique IR characteristics and recommends follow-up observations with high-resolution telescopes to confirm the companion hypothesis and further characterize the system.

引用

页码：1019 / 1028

页数：10

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