J/PASJ/58/L29 JHK photometry of low-mass stars in BRC 14 (Matsuyanagi+, 2006)
Sequential formation of low-mass stars in the BRC 14 region.
Matsuyanagi I., Itoh Y., Sugitani K., Oasa Y., Mukai T., Tamura M.
<Publ. Astron. Soc. Jap., 58, L29-L34 (2006)>
=2006PASJ...58L..29M 2006PASJ...58L..29M
ADC_Keywords: Molecular clouds ; Stars, masses ; Photometry, infrared
Keywords: infrared: stars - stars: formation - stars: low-mass, brown dwarfs -
stars: luminosity function, mass function
Abstract:
We carried out a deep near-infrared survey of a bright-rimmed
molecular cloud, BRC 14 (IC 1848A). The 10σ limiting
magnitude of the survey is 17.7mag at the K-band. Seventy-four
sources are classified as young stellar object (YSO) candidates based
on a near-infrared color-color diagram. The faintest YSO candidates
may have masses on the order of tenths of the solar mass, assuming an
age of 1Myr. We examined three values as indicators of star formation:
fraction of the YSO candidates, extinctions of all sources, and
near-infrared excesses of the YSO candidates. All indicators increase
from outside of the rim to the center of the molecular cloud, which
suggests that the formation of the low-mass stars in the BRC 14 region
proceeds from outside to the center of the cloud.
Description:
The observations were carried out in 2001 August 26 with the
Simultaneous-3 color InfraRed Imager for Unbiased Survey (SIRIUS)
mounted on the 2.2m telescope of University of Hawaii.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 90 74 Near-infrared survey of BRC 14 (IC 1848A)
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Byte-by-byte Description of file: tablee1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [MIS2006] Sequential number
4 I1 h RAh Right ascension (J2000)
6- 7 I2 min RAm Right ascension (J2000)
9- 12 F4.1 s RAs Right ascension (J2000)
14 A1 --- DE- Declination sign (J2000)
15- 16 I2 deg DEd Declination (J2000)
18- 19 I2 arcmin DEm Declination (J2000)
21- 22 I2 arcsec DEs Declination (J2000)
24- 28 F5.2 mag Jmag J magnitude
30 A1 --- leJmag Limit flag on e_Jmag
31- 34 F4.2 mag e_Jmag rms uncertainty on Jmag
36- 40 F5.2 mag Hmag H magnitude
42 A1 --- leHmag Limit flag on e_Hmag
43- 46 F4.2 mag e_Hmag rms uncertainty on Hmag
48- 52 F5.2 mag Ksmag Ks magnitude
54 A1 --- leKsmag Limit flag on e_Ksmag
55- 58 F4.2 mag e_Ksmag rms uncertainty on Ksmag
60- 90 A31 ---- Onames Other names (1)
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Note (1): [OSP02] NN = [OSP2002] BRC 14 NN in Simbad
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 01-Jun-2007