J/ApJS/166/549 HST/ACS observations of NGC 346 (Gouliermis+, 2006)
The star-forming region NGC 346 in the small Magellanic cloud with Hubble Space
telescope ACS observations. I. Photometry.
Gouliermis D.A., Dolphin A.E., Brandner W., Henning T.
<Astrophys. J. Suppl. 166, 549-556 (2006)>
=2006ApJS..166..549G 2006ApJS..166..549G
ADC_Keywords: Clusters, open ; Magellanic Clouds ; Photometry, VRI
Mission_Name: HST
Keywords: catalogs ; Hertzsprung-Russell diagram ;
galaxies: clusters: individual (NGC 346, [BS95] 90) ;
Magellanic Clouds; stars: evolution ; techniques: photometric
Abstract:
We present a photometric study of the star-forming region NGC 346 and
its surrounding field in the Small Magellanic Cloud, using data taken
with the Advanced Camera for Surveys (ACS) on board the Hubble Space
Telescope (HST). The data set contains both short and long exposures
for increased dynamic range, and photometry was performed using the
ACS module of the stellar photometry package DOLPHOT. We detected
almost 100,000 stars over a magnitude range of V∼11 to V∼28 mag,
including all stellar types from the most massive young stars to faint
lower main-sequence and pre-main-sequence stars. We find that this
region, which is characterized by a plethora of stellar systems and
interesting objects, is an outstanding example of mixed stellar
populations. We take into account different features of the
color-magnitude diagram of all the detected stars to distinguish the
two dominant stellar systems: the stellar association NGC 346 and the
old spherical star cluster BS 90. These observations provide a
complete stellar sample of a field about 5'x5' around the most active
star-forming region in this galaxy. Considering the importance of
these data for various investigations in the area, we provide the full
stellar catalog from our photometry. This paper is the first part of
an ongoing study to investigate in detail the two dominant stellar
systems in the area and their surrounding field.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 56 99079 Photometric catalog of stars observed with HST/ACS
in the region of NGC 346
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 56 99079 VI in NGC 346
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See also:
J/PASP/98/1133 : The open cluster NGC 346 (Niemela+, 1986)
J/AJ/98/1305 : Stellar content of NGC 346 (Massey+, 1989)
J/A+A/405/111 : LMC Survey of Young Stellar Systems (Gouliermis+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Num Star number
7- 8 I2 h RAh Hour of Right Ascension (J2000)
10- 11 I2 min RAm Minute of Right Ascension (J2000)
13- 17 F5.2 s RAs Second of Right Ascension (J2000)
19 A1 --- DE- Sign of the Declination (J2000)
20- 21 I2 deg DEd Degree of Declination (J2000)
23- 24 I2 arcmin DEm Arcminute of Declination (J2000)
26- 30 F5.2 arcsec DEs Arcsecond of Declination (J2000)
32- 37 F6.3 mag Vmag The V band (Vega) magnitude (F555W)
39- 43 F5.3 mag e_Vmag The 1σ error in Vmag
45- 50 F6.3 mag Imag The I band (Vega) magnitude (F814W)
52- 56 F5.3 mag e_Imag The 1σ error in Imag
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Francois Ochsenbein [CDS] 17-Apr-2007