An Investigation of New Brown Dwarf Spectral Binary Candidates From the Backyard Worlds: Planet 9 Citizen Science Initiative

被引：1

作者：

Bravo, Alexia ^{[1
]}

Schneider, Adam C. ^{[1
]}

Gagliuffi, Daniella Bardalez ^{[2
]}

Burgasser, Adam J. ^{[3
]}

Meisner, Aaron M. ^{[4
]}

Kirkpatrick, J. Davy ^{[5
]}

Faherty, Jacqueline K. ^{[6
]}

Kuchner, Marc J. ^{[7
]}

Caselden, Dan ^{[6
]}

Sainio, Arttu ^{[8
]}

Hamlet, Les ^{[8
]}

机构：

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

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

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

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

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

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

[7] NASA, Exoplanets & Stellar Astrophys Lab, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[8] Backyard Worlds Planet 9, Tucson, AZ USA

来源：

ASTRONOMICAL JOURNAL | 2023年 / 166卷 / 06期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

SPITZER FOLLOW-UP; T-DWARF; LOW-MASS; PHYSICAL-PROPERTIES; SPEX SPECTROSCOPY; ADAPTIVE OPTICS; COOL NEIGHBORS; DISCOVERY; 2MASS; SEARCH;

D O I：

10.3847/1538-3881/acffc1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present three new brown dwarf spectral-binary candidates: CWISE J072708.09-360729.2, CWISE J103604.84-514424.4, and CWISE J134446.62-732053.9, discovered by citizen scientists through the Backyard Worlds: Planet 9 project. Follow-up near-infrared spectroscopy shows that each of these objects is poorly fit by a single near-infrared standard. We constructed binary templates and found significantly better fits, with component types of L7+T4 for CWISE J072708.09-360729.2, L7+T4 for CWISE J103604.84-514424.4, and L7+T7 for CWISE J134446.62-732053.9. However, further investigation of available spectroscopic indices for evidence of binarity and large amplitude variability suggests that CWISE J072708.09-360729.2 may instead be a strong variability candidate. Our analysis offers tentative evidence and characterization of these peculiar brown dwarf sources, emphasizing their value as promising targets for future high-resolution imaging or photometric variability studies.

引用

页数：7

共 1 条

[1] New Candidate Extreme T Subdwarfs from the Backyard Worlds: Planet 9 Citizen Science Project
Meisner, Aaron M.
Schneider, Adam C.
Burgasser, Adam J.
Marocco, Federico
Line, Michael R.
Faherty, Jacqueline K.
Kirkpatrick, J. Davy
Caselden, Dan
Kuchner, Marc J.
Gelino, Christopher R.
Gagne, Jonathan
Theissen, Christopher
Gerasimov, Roman
Aganze, Christian
Hsu, Chih-chun
Wisniewski, John P.
Casewell, Sarah L.
Bardalez Gagliuffi, Daniella C.
Logsdon, Sarah E.
Eisenhardt, Peter R. M.
Allers, Katelyn
Debes, John H.
Allen, Michaela B.
Stevnbak Andersen, Nikolaj
Goodman, Sam
Gramaize, Leopold
Martin, David W.
Sainio, Arttu
Cushing, Michael C.
ASTROPHYSICAL JOURNAL, 2021, 915 (02)

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