J/AJ/127/1131 NGC 1333 low-mass stars infrared photometry (Wilking+, 2004)
Low-mass stars and substellar objects in the NGC 1333 molecular cloud.
Wilking B.A., Meyer M.R., Greene T.P., Mikhail A., Carlson G.
<Astron. J., 127, 1131-1146 (2004)>
=2004AJ....127.1131W 2004AJ....127.1131W
ADC_Keywords: Molecular clouds ; Stars, pre-main sequence ; Photometry, infrared
Keywords: infrared: stars - ISM: individual (NGC 1333) -
stars: low-mass, brown dwarfs - stars: pre-main-sequence
Abstract:
We present the results of near-infrared imaging and low-resolution
near-infrared spectroscopy of low-mass objects in the NGC 1333
molecular cloud. A JHK survey of an 11.4'x11.7' area of the northern
cluster was conducted to a sensitivity of K≤16mag. Using
near-infrared magnitudes and colors from this and previously published
surveys, 25 brown dwarf candidates were selected toward the
high-extinction cloud core. Spectra in the K band were obtained and
comparisons of the depths of water vapor absorption bands in our
candidate objects with a grid of dwarf, subgiant, and giant standards
were made to derive spectral types. These data were then used to
derive effective temperatures and stellar luminosities that, when
combined with theoretical tracks and isochrones for pre-main-sequence
objects, resulted in estimates for their masses and ages.
Description:
Near-infrared images of the NGC 1333 northern cluster were obtained
using the 1.6m telescope at Mount Bigelow (MBO) near Tucson, Arizona
on the nights of 1999 October 21-23.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 100 212 Photometry of northern NGC 1333 cluster
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See also:
J/A+A/401/543 : XMM-Newton observations of NGC 1333 (Preibisch, 2003)
J/A+AS/106/165 : Near-IR imaging photometry of NGC 1333 (Aspin+ 1994)
J/AJ/111/1964 : JHK photometry of NGC 1333 (Lada+, 1996)
J/ApJ/575/354 : Young stellar objects in the NGC 1333 (Getman+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- MBO Mount Bigelow Observatory number
5- 7 I3 --- ASR ? Aspin et al. (1994, Cat. J/A+AS/106/165)
number
9- 11 I3 --- [LAL96] ? Lada et al. (1996, Cat. J/AJ/111/1964)
number (SQIID)
13 I1 h RAh Hour of Right Ascension (J2000)
15- 16 I2 min RAm Minute of Right Ascension (J2000)
18- 22 F5.2 s RAs Second of Right Ascension (J2000)
23 A1 --- DE- Sign of Declination (J2000)
24- 25 I2 deg DEd Degree of Declination (J2000)
27- 28 I2 arcmin DEm Arcminute of Declination (J2000)
30- 33 F4.1 arcsec DEs Arcsecond of Declination (J2000)
35- 39 F5.2 mag Jmag ? The J band magnitude (1)
41 A1 --- f_Jmag [c] Flag on Jmag (2)
43- 46 F4.2 mag e_Jmag ? The 1σ error in Jmag (3)
48- 52 F5.2 mag Hmag ? The H band magnitude (1)
54 A1 --- f_Hmag [c:] Flag on Hmag (2)
56- 59 F4.2 mag e_Hmag ? The 1σ error in Hmag (3)
61- 65 F5.2 mag Kmag The K band magnitude (1)
67 A1 --- f_Kmag [c:] Flag on Kmag (2)
69- 72 F4.2 mag e_Kmag ? The 1σ error in Kmag (3)
74-100 A27 --- Com Comments
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Note (1): JHK photometry transformed into the CIT photometric system,
(J-K)SQIID=1.03(J-K)MBO-0.14 (see text).
Note (2): Flags are as follows:
c = photometry from Lada et al. (1996, Cat. J/AJ/111/1964);
: = uncertain photometry.
Note (3): Statistical errors only and can be exceeded by uncorrected
variations in the pixel to pixel response across the array of
±0.05mag in the central regions of the mosaic and as large as
±0.10mag in the outer regions.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 02-Jul-2004