Brown Dwarfs and the TW Hydrae Association

By J. Gizis. 2002

210 citations recorded by the source corpus.

I report the results of a survey for low-mass (0.030 M☉ ≳ M ≳ 0.013 M☉) brown dwarfs in the direction of the TW Hya association using the Two Micron All Sky Survey (2MASS). Two late M dwarfs show signs of low surface gravity and are strong candidates to be young, very low mass (M ≈ 0.025 M☉) brown dwarfs related to the TW Hya association. The object 2MASSW J1207334-393254 is particularly notable for its strong Hα emission. The number of detected brown dwarfs is consistent with the substellar mass function in richer star formation environments. Newly identified late M and L dwarfs in the field are also discussed. Unusual objects include an L dwarf with strong Hα emission, a possible wide M8-M9 triple system, and a possible L dwarf companion to an LHS star.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/53e38175c34115893aed82bff9ef3a2192a1971e

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In Astronomy and Astrophysics

1. Michael C. Liu
2. K. Luhman
3. A. Burgasser
4. T. Dupuy
5. Eric Mamajek
6. L. Hillenbrand
7. Kelle Cruz
8. B. Bowler

In Instrumentation

1. Michael C. Liu
2. T. Dupuy
3. A. Burgasser
4. K. Luhman
5. Kelle Cruz
6. J. D. Kirkpatrick
7. K. Allers
8. Eric Mamajek

Citations in the corpus

• An Empirical Criterion to Classify T Tauri Stars and Substellar Analogs Using Low-Resolution Optical Spectroscopy (2003, unknown): “These results are depicted in Figure 4, which includes the Orion population (from Herbig & Bell 1988; Alcalá et al. 1996, 1998, 2000), Taurus (Briceño et al. 1993, 1998, 1999, 2002; Alencar & Basri 2001; Mart́ın et al. 2001a; Luhman et al. 2003a; White & Basri 2003; Muzerolle et al. 2003) IC348 (H”
• BANYAN. VII. A NEW POPULATION OF YOUNG SUBSTELLAR CANDIDATE MEMBERS OF NEARBY MOVING GROUPS FROM THE BASS SURVEY (2015, methodology): “We recovered this object in BASS as a candidate member of ABDMG, and Gizis (2002) identified it as a candidate member of TWA.”
• THE HAWAII INFRARED PARALLAX PROGRAM. II. YOUNG ULTRACOOL FIELD DWARFS (2016, background): “…(2009); (10) Faherty et al. (2012); (11) Faherty et al. (2013); (12) Gagné et al. (2014b); (13) Gagné et al. (2014a); (14) Gagné et al. (2015a); (15) Gizis (2002); (16) Gizis et al. (2012); (17) Hall (2002a); (18) Jameson et al. (2008); (19) Kirkpatrick et al. (2000); (20) Kirkpatrick et al.…”
• A Moving Cluster Distance to the Exoplanet 2M1207b in the TW Hydrae Association (2005, background): “I add to TWA numbers 1 through 25 (Zuckerman & Song 2004) the three, new, low-mass candidate members 2M1207 and 2MASSW J1139511-315921 from Gizis (2002), and SSSPM J1102-3431 from Scholz et al. (2005).”
• A giant planet candidate near a young brown dwarf - Direct VLT/NACO observations using IR wavefront sensing (2004, methodology): “This brown dwarf 2M1207 was identified by Gizis (2002) as a member of Based on observations obtained at the Paranal Observatory, Chile, in ESO programs 73.”
• THE GEMINI/NICI PLANET-FINDING CAMPAIGN: THE FREQUENCY OF PLANETS AROUND YOUNG MOVING GROUP STARS (2013, background): “…then, >20 TW Hya members have been identified (see Webb et al. 1999; Sterzik et al. 1999; Jayawardhana et al. 1999; Zuckerman et al. 2001c, 2004; Gizis 2002; Song et al. 2002, 2003; Kastner et al. 2008; Scholz et al. 2005; Mamajek 2005; Looper et al. 2007; Torres et al. 2008; Fernández et al.…”
• THE DISK POPULATION OF THE TAURUS STAR-FORMING REGION (2009, background): “…examined the colors of probable members of the η Cha, ǫ Cha, and TW Hya associations (TWA, Mamajek et al. 1999; Webb et al. 1999; Lawson et al. 2002; Gizis 2002; Feigelson et al. 2003; Luhman & Steeghs 2004; Luhman 2004a; Lyo et al. 2004; Song et al. 2004; Zuckerman & Song 2004; Mamajek 2005;…”
• Giant Planet Companion to 2MASSW J1207334-393254 (2005, background): “2M1207A was identified by Gizis (2002) as a member of the 8 Myr old TW Hydrae Association (TWA), a result corroborated later by subsequent measurements at optical, infrared, and X-ray wavelengths (see references in Chauvin et al (2004) and proper motion data presented below).”
• Meeting the Cool Neighbors. IX. The Luminosity Function of M7-L8 Ultracool Dwarfs in the Field (2006, background): “…(27) Gizis & Reid (1997); (28) Kirkpatrick et al. (2000); (29) Reid et al. (2001); (30) Hawkins & Bessell (1988); (31) Knapp et al. (2004); (32) Gizis (2002); (33) Liebert et al. (1984); (34) Freed et al. (2003); (35) Tinney et al. (1993); (36) Hartwick et al. (1984); (37) Kirkpatrick et al.…”
• Imaging Extrasolar Giant Planets (2016, background): “2M1207–3932 is in the TW Hydrae Association (Gizis 2002).”
• The T Tauri Phase Down to Nearly Planetary Masses: Echelle Spectra of 82 Very Low Mass Stars and Brown Dwarfs (2005, methodology): “For instance, 2MASS 1207 3932 has a spectral type of M8 from band indices (Gizis 2002); we find that its TiO band shape and strength are comparable to those of targets with spectral type M8 0:5, where the latter are derived from SED fitting.”