2MASS 0213+3648 C: a wide T3 benchmark companion to an active, old M dwarf binary

被引：18

作者：

Deacon, N. R. ^{[1
,2
]}

Magnier, E. A. ^{[3
]}

Liu, Michael C. ^{[3
]}

Schlieder, Joshua E. ^{[2
,4
]}

Aller, Kimberly M. ^{[3
]}

Best, William M. J. ^{[3
]}

Bowler, Brendan P. ^{[5
]}

Burgett, W. S. ^{[6
]}

Chambers, K. C. ^{[3
]}

Draper, P. W. ^{[7
]}

Flewelling, H. ^{[3
]}

Hodapp, K. W. ^{[8
]}

Kaiser, N. ^{[3
]}

Metcalfe, N. ^{[7
]}

Sweeney, W. E. ^{[3
]}

Wainscoat, R. J. ^{[3
]}

Waters, C. ^{[3
]}

机构：

[1] Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England

[2] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[3] Univ Hawaii Manoa, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[4] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[5] Univ Texas Austin, Dept Astron, 2515 Speedway, Austin, TX 78712 USA

[6] Giant Magellan Telescope Observ, Pasadena, CA USA

[7] Univ Durham, Dept Phys, South Rd, Durham DH1 3LE, England

[8] Univ Hawaii, Inst Astron, 640 North Aohoku Pl, Hilo, HI 96720 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 467卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

binaries: visual; brown dwarfs; stars: low-mass; LOW-MASS STARS; VERY-LOW MASS; L/T TRANSITION DWARFS; PROPER MOTION SURVEY; X-RAY-EMISSION; BROWN DWARF; PAN-STARRS; SKY SURVEY; DYNAMICAL MASS; NEARBY STARS;

D O I：

10.1093/mnras/stx065

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of a 360 au separation T3 companion to the tight (3.1 au) M4.5+M6.5 binary 2MASS J02132062+3648506. This companion was identified using Pan-STARRS 1 data and despite its relative proximity to the Sun (22.2(-4.0)(+6.4) pc; Pan-STARRS 1 parallax) and brightness (J= 15.3), it appears to have been missed by previous studies due to its position near a diffraction spike in 2MASS. The close M dwarf binary has active X-ray and Ha emission and shows evidence for UV flares. The binary's weak GALEX UV emission and strong Na I 8200 A Na absorption lead us to an age range of similar to 1-10 Gyr. Applying this age range to evolutionary models implies that the wide companion has a mass of 0.063 similar to 0.009 M circle dot. 2MASS J0213+3648 C provides a relatively old benchmark close to the L/T transition and acts as a key, older comparison to the much younger early-T companions HN Peg B and GU Psc b.

引用

页码：1126 / 1139

页数：14

共 106 条

[1] CAFE: Calar Alto Fiber-fed Echelle spectrograph [J].

Aceituno, J. ;

Sanchez, S. F. ;

Grupp, F. ;

Lillo, J. ;

Hernan-Obispo, M. ;

Benitez, D. ;

Montoya, L. M. ;

Thiele, U. ;

Pedraz, S. ;

Barrado, D. ;

Dreizler, S. ;

Bean, J. .

ASTRONOMY & ASTROPHYSICS, 2013, 552

[2]

Allard F., 2011, ASP Conf. Ser. 448, XVI Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, V448, P91, DOI [10.48550/arXiv.1011.5405, DOI 10.48550/ARXIV.1011.5405]

[3] LOW-MASS TERTIARY COMPANIONS TO SPECTROSCOPIC BINARIES. I. COMMON PROPER MOTION SURVEY FOR WIDE COMPANIONS USING 2MASS [J].

Allen, Peter R. ;

Burgasser, Adam J. ;

Faherty, Jacqueline K. ;

Kirkpatrick, J. Davy .

ASTRONOMICAL JOURNAL, 2012, 144 (02)

[4] A NEAR-INFRARED SPECTROSCOPIC STUDY OF YOUNG FIELD ULTRACOOL DWARFS [J].

Allers, K. N. ;

Liu, Michael C. .

ASTROPHYSICAL JOURNAL, 2013, 772 (02)

[5] CARMENES input catalogue of M dwarfs I. Low-resolution spectroscopy with CAFOS [J].

Alonso-Floriano, F. J. ;

Morales, J. C. ;

Caballero, J. A. ;

Montes, D. ;

Klutsch, A. ;

Mundt, R. ;

Cortes-Contreras, M. ;

Ribas, I. ;

Reiners, A. ;

Amado, P. J. ;

Quirrenbach, A. ;

Jeffers, S. V. .

ASTRONOMY & ASTROPHYSICS, 2015, 577

[6] THE NEAR-ULTRAVIOLET LUMINOSITY FUNCTION OF YOUNG, EARLY M-TYPE DWARF STARS [J].

Ansdell, Megan ;

Gaidos, Eric ;

Mann, Andrew W. ;

Lepine, Sebastien ;

James, David ;

Buccino, Andrea ;

Baranec, Christoph ;

Law, Nicholas M. ;

Riddle, Reed ;

Mauas, Pablo ;

Petrucci, Romina .

ASTROPHYSICAL JOURNAL, 2015, 798 (01)

[7] Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458 [J].

Baraffe, I ;

Chabrier, G ;

Barman, TS ;

Allard, F ;

Hauschildt, PH .

ASTRONOMY & ASTROPHYSICS, 2003, 402 (02) :701-712

[8] A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood [J].

Bell, Cameron P. M. ;

Mamajek, Eric E. ;

Naylor, Tim .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2015, 454 (01) :593-614

[9] A SEARCH FOR L/T TRANSITION DWARFS WITH PAN-STARRS1 AND WISE. II. L/T TRANSITION ATMOSPHERES AND YOUNG DISCOVERIES [J].

Best, William M. J. ;

Liu, Michael C. ;

Magnier, Eugene A. ;

Deacon, Niall R. ;

Aller, Kimberly M. ;

Redstone, Joshua ;

Burgett, W. S. ;

Chambers, K. C. ;

Draper, P. ;

Flewelling, H. ;

Hodapp, K. W. ;

Kaiser, N. ;

Metcalfe, N. ;

Tonry, J. L. ;

Wainscoat, R. J. ;

Waters, C. .

ASTROPHYSICAL JOURNAL, 2015, 814 (02)

[10] A SEARCH FOR L/T TRANSITION DWARFS WITH Pan-STARRS1 AND WISE: DISCOVERY OF SEVEN NEARBY OBJECTS INCLUDING TWO CANDIDATE SPECTROSCOPIC VARIABLES [J].

Best, William M. J. ;

Liu, Michael C. ;

Magnier, Eugene A. ;

Aller, Kimberly M. ;

Deacon, Niall R. ;

Dupuy, Trent J. ;

Redstone, Joshua ;

Burgett, W. S. ;

Chambers, K. C. ;

Hodapp, K. W. ;

Kaiser, N. ;

Kudritzki, R-P. ;

Morgan, J. S. ;

Price, P. A. ;

Tonry, J. L. ;

Wainscoat, R. J. .

ASTROPHYSICAL JOURNAL, 2013, 777 (02)

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