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

N. R. Deacon; E. A. Magnier; Michael C. Liu; Joshua E. Schlieder; Kimberly M. Aller; William M. J. Best; Brendan P. Bowler; W. S. Burgett; K. C. Chambers; P. W. Draper; H. Flewelling; K. W. Hodapp; N. Kaiser; N. Metcalfe; W. E. Sweeney; R. J. Wainscoat; C. Waters

doi:10.1093/mnras/stx065

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

N. R. Deacon, E. A. Magnier, Michael C. Liu, Joshua E. Schlieder, Kimberly M. Aller, William M. J. Best, Brendan P. Bowler, W. S. Burgett, K. C. Chambers, P. W. Draper, H. Flewelling, K. W. Hodapp, N. Kaiser, N. Metcalfe, W. E. Sweeney, R. J. Wainscoat, C. Waters

Centre for Astrophysics Research (CAR)

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Abstract

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-STARRS1 data and, despite its relative proximity to the Sun (22.2$_{-4.0}^{+6.4}$ pc; Pan-STARRS1 parallax) and brightness ($J$=15.3), 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 H$\alpha$ emission and shows evidence for UV flares. The binary's weak {\it GALEX} UV emission and strong Na I 8200\AA Na absorption leads us to an age range of $\sim$1-10Gyr. Applying this age range to evolutionary models implies the wide companion has a mass of 0.063$\pm$0.009\,$M_{\odot}$. 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.

Original language	English
Pages (from-to)	1126-1139
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	467
Issue number	1
Early online date	24 Jan 2017
DOIs	https://doi.org/10.1093/mnras/stx065
Publication status	Published - 1 May 2017

Keywords

astro-ph.SR

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Deacon, N. R., Magnier, E. A., Liu, M. C., Schlieder, J. E., Aller, K. M., Best, W. M. J., Bowler, B. P., Burgett, W. S., Chambers, K. C., Draper, P. W., Flewelling, H., Hodapp, K. W., Kaiser, N., Metcalfe, N., Sweeney, W. E., Wainscoat, R. J., & Waters, C. (2017). 2MASS 0213+3648 C: A wide T3 benchmark companion to an an active, old M dwarf binary. Monthly Notices of the Royal Astronomical Society, 467(1), 1126-1139. https://doi.org/10.1093/mnras/stx065

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title = "2MASS 0213+3648 C:: A wide T3 benchmark companion to an an active, old M dwarf binary",

abstract = "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-STARRS1 data and, despite its relative proximity to the Sun (22.2$_{-4.0}^{+6.4}$ pc; Pan-STARRS1 parallax) and brightness ($J$=15.3), 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 H$\alpha$ emission and shows evidence for UV flares. The binary's weak {\it GALEX} UV emission and strong Na I 8200\AA Na absorption leads us to an age range of $\sim$1-10Gyr. Applying this age range to evolutionary models implies the wide companion has a mass of 0.063$\pm$0.009\,$M_{\odot}$. 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.",

keywords = "astro-ph.SR",

author = "Deacon, {N. R.} and Magnier, {E. A.} and Liu, {Michael C.} and Schlieder, {Joshua E.} and Aller, {Kimberly M.} and Best, {William M. J.} and Bowler, {Brendan P.} and Burgett, {W. S.} and Chambers, {K. C.} and Draper, {P. W.} and H. Flewelling and Hodapp, {K. W.} and N. Kaiser and N. Metcalfe and Sweeney, {W. E.} and Wainscoat, {R. J.} and C. Waters",

note = "This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. {\textcopyright} 2017 The Author (s). Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2017",

month = may,

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doi = "10.1093/mnras/stx065",

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Deacon, NR, Magnier, EA, Liu, MC, Schlieder, JE, Aller, KM, Best, WMJ, Bowler, BP, Burgett, WS, Chambers, KC, Draper, PW, Flewelling, H, Hodapp, KW, Kaiser, N, Metcalfe, N, Sweeney, WE, Wainscoat, RJ & Waters, C 2017, '2MASS 0213+3648 C: A wide T3 benchmark companion to an an active, old M dwarf binary', Monthly Notices of the Royal Astronomical Society, vol. 467, no. 1, pp. 1126-1139. https://doi.org/10.1093/mnras/stx065

TY - JOUR

T1 - 2MASS 0213+3648 C:

T2 - A wide T3 benchmark companion to an an active, old M dwarf binary

AU - Deacon, N. R.

AU - Magnier, E. A.

AU - Liu, Michael C.

AU - Schlieder, Joshua E.

AU - Aller, Kimberly M.

AU - Best, William M. J.

AU - Bowler, Brendan P.

AU - Burgett, W. S.

AU - Chambers, K. C.

AU - Draper, P. W.

AU - Flewelling, H.

AU - Hodapp, K. W.

AU - Kaiser, N.

AU - Metcalfe, N.

AU - Sweeney, W. E.

AU - Wainscoat, R. J.

AU - Waters, C.

N1 - This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2017 The Author (s). Published by Oxford University Press on behalf of the Royal Astronomical Society.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - 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-STARRS1 data and, despite its relative proximity to the Sun (22.2$_{-4.0}^{+6.4}$ pc; Pan-STARRS1 parallax) and brightness ($J$=15.3), 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 H$\alpha$ emission and shows evidence for UV flares. The binary's weak {\it GALEX} UV emission and strong Na I 8200\AA Na absorption leads us to an age range of $\sim$1-10Gyr. Applying this age range to evolutionary models implies the wide companion has a mass of 0.063$\pm$0.009\,$M_{\odot}$. 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.

AB - 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-STARRS1 data and, despite its relative proximity to the Sun (22.2$_{-4.0}^{+6.4}$ pc; Pan-STARRS1 parallax) and brightness ($J$=15.3), 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 H$\alpha$ emission and shows evidence for UV flares. The binary's weak {\it GALEX} UV emission and strong Na I 8200\AA Na absorption leads us to an age range of $\sim$1-10Gyr. Applying this age range to evolutionary models implies the wide companion has a mass of 0.063$\pm$0.009\,$M_{\odot}$. 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.

KW - astro-ph.SR

U2 - 10.1093/mnras/stx065

DO - 10.1093/mnras/stx065

M3 - Article

SN - 0035-8711

VL - 467

SP - 1126

EP - 1139

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

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

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