J/ApJS/176/457 Taurus dark cloud background star catalog (Shenoy+, 2008)
A catalog of background stars reddened by dust in the Taurus dark clouds.
Shenoy S.S., Whittet D.C.B., Ives J.A., Watson D.M.
<Astrophys. J. Suppl. Ser., 176, 457-466 (2008)>
=2008ApJS..176..457S 2008ApJS..176..457S
ADC_Keywords: Photometry, infrared ; YSOs ; Molecular clouds ; Extinction
Keywords: dust, extinction - infrared: stars - ISM: clouds
ISM: individual (Taurus Dark Cloud)
Abstract:
Normal field stars located behind dense clouds are a valuable resource
in interstellar astrophysics, as they provide continua in which to
study phenomena such as gas-phase and solid-state absorption features,
interstellar extinction, and polarization. This paper reports the
results of a search for highly reddened stars behind the Taurus Dark
Cloud complex. We use the Two Micron All Sky Survey (2MASS) Point
Source Catalog to survey a ∼50deg2 area of the cloud to a limiting
magnitude of Ks=10.0. Photometry in the 1.2-2.2um passbands from 2MASS
is combined with photometry at longer infrared wavelengths (3.6-12um)
from the Spitzer Space Telescope and the Infrared Astronomical
Satellite to provide effective discrimination between reddened field
stars and young stellar objects (YSOs) embedded in the cloud. Our
final catalog contains 248 confirmed or probable background field
stars, together with estimates of their total visual extinctions,
which span the range 2<AV<29mag. We also identify the 2MASS source
J04292083+2742074 (IRAS 04262+2735) as a previously unrecognized
candidate YSO, based on the presence of infrared emission greatly in
excess of that predicted for a normal reddened photosphere at
wavelengths >5um.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 96 259 Catalog of reddened field stars and associated
data (table 1 and 2 of the paper)
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
J/ApJ/647/1180 : Infrared photometry of Taurus SFR (Luhman+, 2006)
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 2MASS 2MASS identification (JHHMMSSss+DDMMSSs)
18 A1 --- f_2MASS [*] Object from table 2 (YSO)
20- 39 A20 --- OName Other name (1)
41- 46 A6 --- SpT MK Spectral type (2)
47 A1 --- r_SpT [bdef] Origin of spectral type (2)
49- 52 F4.2 mag J-H ? 2MASS J-H color index
54- 57 F4.2 mag H-Ks ? 2MASS H-Ks color index
59- 62 F4.2 mag Ksmag ? 2MASS Ks magnitude
64- 67 F4.2 mag [3.6] ? Spitzer IRAC magnitude at 3.6um
68 A1 --- f_[3.6] [s] indicates saturation
70- 73 F4.2 mag [4.5] ? Spitzer IRAC magnitude at 4.5um
74 A1 --- f_[4.5] [s] indicates saturation
76- 79 F4.2 mag [5.8] ? Spitzer IRAC magnitude at 5.8um
81- 84 F4.2 mag [8.0] ? Spitzer IRAC magnitude at 8.0um
85 A1 --- f_[8.0] [s] indicates saturation
87- 90 F4.2 mag [12] ? IRAS 12um flux data (4)(3)
91 A1 --- f_[12] [c] 12um flux simulated from Spitzer data (4)
93- 96 F4.1 mag Av Visual extinction
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Note (1): Key to identifications as follows:
Elias = Elias (1978ApJ...224..857E 1978ApJ...224..857E, Elia 3-NN in Simbad);
GJL = Goodman et al. (1992ApJ...399..108G 1992ApJ...399..108G, [GJL92] HHMMSS.s+DDMMSS in
Simbad);
GKH = Gomez et al. (1994AJ....107.1850G 1994AJ....107.1850G, [GKH94] NN in Simbad);
IRAS = Beichman et al. (1988, Cat. II/125);
JH = Jones & Herbig (1979AJ.....84.1872J 1979AJ.....84.1872J, JH NNN in Simbad);
Kim = unpublished catalog cited by Murakawa et al. (2000ApJS..128..603M 2000ApJS..128..603M,
Kim 1-NNN in Simbad);
TNS = Tamura et al., 1987MNRAS.224..413T 1987MNRAS.224..413T ([TNS87] NN in Simbad);
V410 Anon = Strom & Strom (1994ApJ...424..237S 1994ApJ...424..237S, [SS94] V410 Anon NN in
Simbad).
Note (2): Spectral classifications are from SIMBAD unless flag indications as
follows:
b = Spectral classification from Shenoy (2003, Ph.D. thesis, Rensselaer
Polytech).
d = Excess infrared flux at λ>5um suggests this star to be a YSO (see
Section 5).
e = Spectral classification from Murakawa et al. (2000ApJS..128..603M 2000ApJS..128..603M)
f = Spectral type from Luhman et al. (2006, Cat. J/ApJ/647/1180)
Note (3): Photometry at 12um is calculated from flux data in the IRAS Point
Source Catalog (ver. 2.0, Cat. II/125) unless flag 'c' indication.
Note (4): Photometry simulated from Spitzer IRS 9.9-19.6um calibrated flux
spectra (Whittet et al., 2007ApJ...655..332W 2007ApJ...655..332W).
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 31-Aug-2009