PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROUPS

Brendan P. Bowler; Evgenya L. Shkolnik; Michael C. Liu; Joshua E. Schlieder; Andrew W. Mann; Trent J. Dupuy; Sasha Hinkley; Justin R. Crepp; John Asher Johnson; Andrew W. Howard; Laura Flagg; Alycia J. Weinberger; Kimberly M. Aller; Katelyn N. Allers; William M. J. Best; Michael C. Kotson; Benjamin T. Montet; Gregory J. Herczeg; Christoph Baranec; Reed Riddle; Nicholas M. Law; Eric L. Nielsen; Zahed Wahhaj; Beth A. Biller; Thomas L. Hayward

doi:10.1088/0004-637X/806/1/62

PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROUPS

Brendan P. Bowler^*, Evgenya L. Shkolnik, Michael C. Liu, Joshua E. Schlieder, Andrew W. Mann, Trent J. Dupuy, Sasha Hinkley, Justin R. Crepp, John Asher Johnson, Andrew W. Howard, Laura Flagg, Alycia J. Weinberger, Kimberly M. Aller, Katelyn N. Allers, William M. J. Best, Michael C. Kotson, Benjamin T. Montet, Gregory J. Herczeg, Christoph Baranec, Reed RiddleNicholas M. Law, Eric L. Nielsen, Zahed Wahhaj, Beth A. Biller, Thomas L. Hayward

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present optical and near-infrared adaptive optics (AO) imaging and spectroscopy of 13 ultracool (>M6) companions to late-type stars (K7-M4.5), most of which have recently been identified as candidate members of nearby young moving groups (YMGs; 8-120 Myr) in the literature. Three of these are new companions identified in our AO imaging survey, and two others are confirmed to be comoving with their host stars for the first time. The inferred masses of the companions (similar to 10-100 M-Jup) are highly sensitive to the ages of the primary stars; therefore we critically examine the kinematic and spectroscopic properties of each system to distinguish bona fide YMG members from old field interlopers. The new M7 substellar companion 2MASS J02155892-0929121 C (40-60 M-Jup) shows. clear spectroscopic signs of low gravity and, hence, youth. The primary, possibly a member of the similar to 40 Myr Tuc-Hor moving group, is visually resolved into three components, making it a young low-mass quadruple system in a compact (less than or similar to 100 AU) configuration. In addition, LiI lambda 6708 absorption in the intermediate-gravity M7.5 companion 2MASS J15594729+4403595 B provides unambiguous evidence that it is young (less than or similar to 200 Myr) and resides below the hydrogen-burning limit. Three new close-separation (

Original language	English
Article number	62
Number of pages	36
Journal	Astrophysical Journal
Volume	806
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/806/1/62
Publication status	Published - 10 Jun 2015

Keywords / Materials (for Non-textual outputs)

binaries: spectroscopic
brown dwarfs
stars: individual (2MASS J02155892, 0929121, 2MASS J15594729+4403595, HD 23514)
TW-HYDRAE ASSOCIATION
DIGITAL SKY SURVEY
VERY-LOW MASS
BRIGHT SOURCE CATALOG
X-RAY SOURCES
SOUTHERN SPECTROPHOTOMETRIC STANDARDS
CANDIDATE SUBSTELLAR COMPANION
SUPERNOVA FACTORY OBSERVATIONS
FINDING CAMPAIGN DISCOVERY
EXTRASOLAR GIANT PLANETS

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10.1088/0004-637X/806/1/62

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Bowler, B. P., Shkolnik, E. L., Liu, M. C., Schlieder, J. E., Mann, A. W., Dupuy, T. J., Hinkley, S., Crepp, J. R., Johnson, J. A., Howard, A. W., Flagg, L., Weinberger, A. J., Aller, K. M., Allers, K. N., Best, W. M. J., Kotson, M. C., Montet, B. T., Herczeg, G. J., Baranec, C., ... Hayward, T. L. (2015). PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROUPS. Astrophysical Journal, 806(1), Article 62. https://doi.org/10.1088/0004-637X/806/1/62

@article{16abe0340f094780a6829522de57f95c,

title = "PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROUPS",

abstract = "We present optical and near-infrared adaptive optics (AO) imaging and spectroscopy of 13 ultracool (>M6) companions to late-type stars (K7-M4.5), most of which have recently been identified as candidate members of nearby young moving groups (YMGs; 8-120 Myr) in the literature. Three of these are new companions identified in our AO imaging survey, and two others are confirmed to be comoving with their host stars for the first time. The inferred masses of the companions (similar to 10-100 M-Jup) are highly sensitive to the ages of the primary stars; therefore we critically examine the kinematic and spectroscopic properties of each system to distinguish bona fide YMG members from old field interlopers. The new M7 substellar companion 2MASS J02155892-0929121 C (40-60 M-Jup) shows. clear spectroscopic signs of low gravity and, hence, youth. The primary, possibly a member of the similar to 40 Myr Tuc-Hor moving group, is visually resolved into three components, making it a young low-mass quadruple system in a compact (less than or similar to 100 AU) configuration. In addition, LiI lambda 6708 absorption in the intermediate-gravity M7.5 companion 2MASS J15594729+4403595 B provides unambiguous evidence that it is young (less than or similar to 200 Myr) and resides below the hydrogen-burning limit. Three new close-separation (",

keywords = "binaries: spectroscopic, brown dwarfs, stars: individual (2MASS J02155892, 0929121, 2MASS J15594729+4403595, HD 23514), TW-HYDRAE ASSOCIATION, DIGITAL SKY SURVEY, VERY-LOW MASS, BRIGHT SOURCE CATALOG, X-RAY SOURCES, SOUTHERN SPECTROPHOTOMETRIC STANDARDS, CANDIDATE SUBSTELLAR COMPANION, SUPERNOVA FACTORY OBSERVATIONS, FINDING CAMPAIGN DISCOVERY, EXTRASOLAR GIANT PLANETS",

author = "Bowler, {Brendan P.} and Shkolnik, {Evgenya L.} and Liu, {Michael C.} and Schlieder, {Joshua E.} and Mann, {Andrew W.} and Dupuy, {Trent J.} and Sasha Hinkley and Crepp, {Justin R.} and Johnson, {John Asher} and Howard, {Andrew W.} and Laura Flagg and Weinberger, {Alycia J.} and Aller, {Kimberly M.} and Allers, {Katelyn N.} and Best, {William M. J.} and Kotson, {Michael C.} and Montet, {Benjamin T.} and Herczeg, {Gregory J.} and Christoph Baranec and Reed Riddle and Law, {Nicholas M.} and Nielsen, {Eric L.} and Zahed Wahhaj and Biller, {Beth A.} and Hayward, {Thomas L.}",

year = "2015",

month = jun,

day = "10",

doi = "10.1088/0004-637X/806/1/62",

language = "English",

volume = "806",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing",

number = "1",

}

Bowler, BP, Shkolnik, EL, Liu, MC, Schlieder, JE, Mann, AW, Dupuy, TJ, Hinkley, S, Crepp, JR, Johnson, JA, Howard, AW, Flagg, L, Weinberger, AJ, Aller, KM, Allers, KN, Best, WMJ, Kotson, MC, Montet, BT, Herczeg, GJ, Baranec, C, Riddle, R, Law, NM, Nielsen, EL, Wahhaj, Z, Biller, BA & Hayward, TL 2015, 'PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROUPS', Astrophysical Journal, vol. 806, no. 1, 62. https://doi.org/10.1088/0004-637X/806/1/62

TY - JOUR

T1 - PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROUPS

AU - Bowler, Brendan P.

AU - Shkolnik, Evgenya L.

AU - Liu, Michael C.

AU - Schlieder, Joshua E.

AU - Mann, Andrew W.

AU - Dupuy, Trent J.

AU - Hinkley, Sasha

AU - Crepp, Justin R.

AU - Johnson, John Asher

AU - Howard, Andrew W.

AU - Flagg, Laura

AU - Weinberger, Alycia J.

AU - Aller, Kimberly M.

AU - Allers, Katelyn N.

AU - Best, William M. J.

AU - Kotson, Michael C.

AU - Montet, Benjamin T.

AU - Herczeg, Gregory J.

AU - Baranec, Christoph

AU - Riddle, Reed

AU - Law, Nicholas M.

AU - Nielsen, Eric L.

AU - Wahhaj, Zahed

AU - Biller, Beth A.

AU - Hayward, Thomas L.

PY - 2015/6/10

Y1 - 2015/6/10

N2 - We present optical and near-infrared adaptive optics (AO) imaging and spectroscopy of 13 ultracool (>M6) companions to late-type stars (K7-M4.5), most of which have recently been identified as candidate members of nearby young moving groups (YMGs; 8-120 Myr) in the literature. Three of these are new companions identified in our AO imaging survey, and two others are confirmed to be comoving with their host stars for the first time. The inferred masses of the companions (similar to 10-100 M-Jup) are highly sensitive to the ages of the primary stars; therefore we critically examine the kinematic and spectroscopic properties of each system to distinguish bona fide YMG members from old field interlopers. The new M7 substellar companion 2MASS J02155892-0929121 C (40-60 M-Jup) shows. clear spectroscopic signs of low gravity and, hence, youth. The primary, possibly a member of the similar to 40 Myr Tuc-Hor moving group, is visually resolved into three components, making it a young low-mass quadruple system in a compact (less than or similar to 100 AU) configuration. In addition, LiI lambda 6708 absorption in the intermediate-gravity M7.5 companion 2MASS J15594729+4403595 B provides unambiguous evidence that it is young (less than or similar to 200 Myr) and resides below the hydrogen-burning limit. Three new close-separation (

AB - We present optical and near-infrared adaptive optics (AO) imaging and spectroscopy of 13 ultracool (>M6) companions to late-type stars (K7-M4.5), most of which have recently been identified as candidate members of nearby young moving groups (YMGs; 8-120 Myr) in the literature. Three of these are new companions identified in our AO imaging survey, and two others are confirmed to be comoving with their host stars for the first time. The inferred masses of the companions (similar to 10-100 M-Jup) are highly sensitive to the ages of the primary stars; therefore we critically examine the kinematic and spectroscopic properties of each system to distinguish bona fide YMG members from old field interlopers. The new M7 substellar companion 2MASS J02155892-0929121 C (40-60 M-Jup) shows. clear spectroscopic signs of low gravity and, hence, youth. The primary, possibly a member of the similar to 40 Myr Tuc-Hor moving group, is visually resolved into three components, making it a young low-mass quadruple system in a compact (less than or similar to 100 AU) configuration. In addition, LiI lambda 6708 absorption in the intermediate-gravity M7.5 companion 2MASS J15594729+4403595 B provides unambiguous evidence that it is young (less than or similar to 200 Myr) and resides below the hydrogen-burning limit. Three new close-separation (

KW - binaries: spectroscopic

KW - brown dwarfs

KW - stars: individual (2MASS J02155892, 0929121, 2MASS J15594729+4403595, HD 23514)

KW - TW-HYDRAE ASSOCIATION

KW - DIGITAL SKY SURVEY

KW - VERY-LOW MASS

KW - BRIGHT SOURCE CATALOG

KW - X-RAY SOURCES

KW - SOUTHERN SPECTROPHOTOMETRIC STANDARDS

KW - CANDIDATE SUBSTELLAR COMPANION

KW - SUPERNOVA FACTORY OBSERVATIONS

KW - FINDING CAMPAIGN DISCOVERY

KW - EXTRASOLAR GIANT PLANETS

U2 - 10.1088/0004-637X/806/1/62

DO - 10.1088/0004-637X/806/1/62

M3 - Article

SN - 0004-637X

VL - 806

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 62

ER -

PLANETS AROUND LOW-MASS STARS (PALMS). V. AGE-DATING LOW-MASS COMPANIONS TO MEMBERS AND INTERLOPERS OF YOUNG MOVING GROUPS

Abstract

Keywords / Materials (for Non-textual outputs)

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