J/AJ/132/2665 QUEST2 BRI photometry of Taurus-Auriga PMS (Slesnick+, 2006)
A distributed population of low-mass pre-main-sequence stars near the
Taurus molecular clouds.
Slesnick C.L., Carpenter J.M., Hillenbrand L.A., Mamajek E.E.
<Astron. J., 132, 2665-2674 (2006)>
=2006AJ....132.2665S 2006AJ....132.2665S
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry, infrared ;
Spectra, infrared
Keywords: open clusters and associations: individual (Taurus) -
stars: low-mass, brown dwarfs - stars: pre-main sequence
Abstract:
We present a drift-scan survey covering a ∼5°x5° region toward
the southern portion of the Taurus-Auriga molecular cloud. Data taken
in the B,R,I filters with the Quest-2 camera on the Palomar 48 inch
(1.2m) Samuel Oschin Telescope were combined with Two Micron All Sky
Survey near-infrared photometry to select candidate young stars.
Follow-up optical spectroscopy of 190 candidates led to the
identification of 42 new low-mass pre-main-sequence stars with
spectral types M4-M8, of which approximately half exhibit surface
gravity signatures similar to known Taurus stars, while the other half
exhibit surface gravity signatures similar to members of the somewhat
older Upper Scorpius, TW Hya, and Pic associations.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 86 42 Measured quantities for new PMS stars
tablea1.dat 72 148 Measured quantities for candidates
spectroscopically confirmed as field dwarfs
--------------------------------------------------------------------------------
See also:
J/A+A/312/439 : New T Tauri stars in Taurus-Auriga (Wichmann+, 1996)
J/A+AS/101/485 : Multisite UBVRI photometry in Tau-Aur cloud (Bouvier+ 1993)
J/A+AS/124/449 : Young stars south of Taurus-Auriga (Magazzu+ 1997)
J/A+AS/132/173 : New weak-line T Tauri stars in Taurus-Auriga (Li+ 1998)
J/A+AS/145/187 : uvby-β photometry of WTTS (Chavarria-K+, 2000)
J/ApJ/581/1194 : Taurus-Auriga PMS stars ages and Teff (Palla+, 2002)
J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [SCH]
5- 20 A16 --- [SCH2006b] Stellar identification, JHHMMSSs+DDMMSSs
22 A1 --- f_[SCH2006b] [b] Flag on [SCH2006b] (1)
24- 27 F4.1 mag Bmag ? Quest-2 B band magnitude
29- 32 F4.1 mag Rmag Quest-2 R band magnitude
34- 37 F4.1 mag Imag Quest-2 I band magnitude
39- 43 F5.2 mag Jmag 2MASS J band magnitude
45- 49 F5.2 mag Hmag 2MASS H band magnitude
51- 55 F5.2 mag Ksmag 2MASS KS band magnitude
57- 60 F4.2 --- TiO(7140) The TiO-7140 spectral index
62- 65 F4.2 --- TiO(8165) The TiO-8165 spectral index
67- 70 F4.2 --- Na(8195) The Na-8195 spectral index
72- 76 A5 --- SpType MK spectral type
78- 80 I3 0.1nm EWHa ? The Hα equivalent width in Angstroms
82- 86 A5 --- Age Stellar age, as young (1-2Myr)
or int (5-10Myr)
--------------------------------------------------------------------------------
Note (1): Three of our PMS objects were previously identified in the literature:
SCH J0429595+2433080 = Gueiu et al., 2006, Cat. J/A+A/446/485
SCH J0431191+2335048 = Luhman, 2006, Cat. J/ApJ/645/676
SCH J0416272+2053093 = Wichmann et al., 1996, Cat. J/A+A/312/439
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [SCH]
5- 22 A18 --- [SCH2006b] Stellar identification, JHHMMSSss+DDMMSSss
24 A1 --- f_[SCH2006b] [b] Flag on [SCH2006b] (1)
26- 29 F4.1 mag Bmag ? Quest-2 B band magnitude
31- 34 F4.1 mag Rmag ? Quest-2 R band magnitude
36- 39 F4.1 mag Imag Quest-2 I band magnitude
41- 45 F5.2 mag Jmag 2MASS J band magnitude
47- 51 F5.2 mag Hmag 2MASS H band magnitude
53- 57 F5.2 mag Ksmag 2MASS KS band magnitude
59- 62 F4.2 --- TiO(7140) The TiO-7140 index
64- 67 F4.2 --- TiO(8165) The TiO-8165 spectral index
69- 72 F4.2 --- Na(8195) The Na-8195 spectral index
--------------------------------------------------------------------------------
Note (1): Two faint candidates observed during the first spectroscopic
observing run before the final photometric calibrations were finished
do not have R-band photometry.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-Jul-2008