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J/ApJ/647/1180      Infrared photometry of Taurus SFR        (Luhman+, 2006)

A survey for new members of Taurus with the Spitzer Space Telescope. Luhman K.L., Whitney B.A., Meade M.R., Babler B.L., Indebetouw R., Bracker S., Churchwell E.B. <Astrophys. J., 647, 1180-1191 (2006)> =2006ApJ...647.1180L
ADC_Keywords: Associations, stellar ; Photometry, infrared Keywords: infrared: stars - stars: evolution - stars: formation - stars: low-mass, brown dwarfs - stars: luminosity function, mass function - stars: pre-main-sequence Abstract: We present the results of a search for new members of the Taurus star-forming region using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope. With IRAC images of 29.7deg2 of Taurus at 3.6, 4.5, 5.8, and 8.0um, we have identified sources with red mid-infrared colors indicative of disk-bearing objects and have obtained optical and infrared spectra of 23 of these candidate members. Through this work, we have discovered 13 new members of Taurus, two of which have spectral types later than M6 and thus are likely to be brown dwarfs, according to the theoretical evolutionary models of Chabrier & Baraffe (2000ApJ...542..464C). This survey indicates that the previous census of Taurus has a completeness of 80% for members with disks. The new members that we have found do not significantly modify the previously measured distributions of Taurus members as a function of position, mass, and extinction. For instance, we find no evidence for a population of highly reddened brown dwarfs ({LAMBDA}K∼2) that has been missed by previous optical and near-infrared surveys, which suggests that brown dwarf disks are not significantly more flared than disks around stars. In addition to the new members, we also present IRAC photometry for the 149 previously known members that appear within this survey, which includes 27 objects later than M6. Description: To search for new members of Taurus, we used unpublished archival images at 3.6, 4.5, 5.8, and 8.0um that were obtained with the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope during the General Observer program 3584 by D. Padgett. The plate scale and field of view of IRAC are 1.2" and 5.2'x5.2', respectively. The camera produces images with FWHM=1.6"-1.9" from 3.6 to 8.0um. The IRAC data for Taurus were collected between 2005 February 20 and 27 (UT). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 107 144 Previously Known Members of Taurus in Spitzer Survey
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 17 A17 --- 2MASS 2MASS name (JHHMMSSss+DDMMSSs) 19- 42 A24 --- Name Name 45- 48 F4.2 mag J-H ? 2MASS J-H colour index 50- 53 F4.2 mag H-Ks ? 2MASS H-Ks colour index 55- 59 F5.2 mag Ksmag ? 2MASS Ks magnitude 61 A1 --- l_[3.6] Limit flag on [3.6] 62- 66 F5.2 mag [3.6] ? IRAC 3.6um magnitude 68- 71 F4.2 mag e_[3.6] ? rms uncertainty on [3.6] 73 A1 --- l_[4.5] Limit flag on [3.6] 74- 78 F5.2 mag [4.5] ? IRAC 4.5um magnitude 80- 83 F4.2 mag e_[4.5] ? rms uncertainty on [4.5] 85 A1 --- l_[5.8] Limit flag on [3.6] 86- 90 F5.2 mag [5.8] ? IRAC 5.8um magnitude 92- 95 F4.2 mag e_[5.8] ? rms uncertainty on [5.8] 97 A1 --- l_[8.0] Limit flag on [3.6] 98-102 F5.2 mag [8.0] ? IRAC 8.0um magnitude 104-107 F4.2 mag e_[8.0] ? rms uncertainty on [8.0]
History: * 01-Aug-2008: From electronic version of the journal * 16-Feb-2009: First line of table4 has been restored
(End) Patricia Vannier [CDS] 11-Jul-2008
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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