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J/ApJ/672/914          HST photometry in NGC 346      (Hennekemper+, 2008)

NGC 346 in the Small Magellanic Cloud. III. Recent star formation and stellar clustering properties in the bright HII region N66. Hennekemper E., Gouliermis D.A., Henning T., Brandner W., Dolphin A.E. <Astrophys. J., 672, 914-929 (2008)> =2008ApJ...672..914H
ADC_Keywords: Magellanic Clouds ; Associations, stellar ; Stars, pre-main sequence ; Photometry Keywords: galaxies: clusters: individual (NGC 346) - galaxies: star clusters - Magellanic Clouds - stars: evolution Abstract: In the third part of our photometric study of the star-forming region NGC 346/N66 and its surrounding field in the Small Magellanic Cloud (SMC), we focus on the large number of low-mass pre-main-sequence (PMS) stars revealed by the Hubble Space Telescope observations with the Advanced Camera for Surveys. We investigate the origin of the observed broadening of the PMS population in the V-I,V color-magnitude diagram. The most likely explanations are either the presence of differential reddening or an age spread among the young stars. Description: The observations used in this study, taken with HST ACS (GO Program 10248), and the photometry with the package DOLPHOT,2 is thoroughly presented in Paper I (Gouliermis et al., Cat. J/ApJS/166/549). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 86 31 Photometry of OB Stars in NGC 346 table2.dat 64 16 *Candidate YSOs found with Spitzer in the area centered on NGC 346
Note on table2.dat: None of these objects were detected in the longer wave bands of MIPS (70 and 160um).
See also: J/ApJS/166/549 : HST/ACS observations of NGC 346 (Gouliermis+, 2006) J/ApJ/655/212 : S3MC IRAC and MIPS photometry (Bolatto+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- [GDB2006] Sequential number, as in Gouliermis et al. 2006, Cat. J/ApJS/166/549 4- 5 I2 h RAh Right ascension (J2000) 7- 8 I2 min RAm Right ascension (J2000) 10- 14 F5.2 s RAs Right ascension (J2000) 16 A1 --- DE- Declination sign (J2000) 17- 18 I2 deg DEd Declination (J2000) 20- 21 I2 arcmin DEm Declination (J2000) 23- 27 F5.2 arcsec DEs Declination (J2000) 29- 33 F5.2 mag VmagA ACS V magnitude (1) 35- 39 F5.2 mag VmagC CTIO V magnitude (1) 41- 45 F5.2 mag U-B CTIO U-B colour index (1) 47- 51 F5.2 mag B-V CTIO B-V colour index (1) 53- 64 A12 ---- SpType MK spectral Type 66- 70 F5.2 mag Q Reddening-free parameter 72- 76 F5.2 mag (B-V)0 Deredenned B-V colour index 78- 81 F4.2 mag E(B-V) B-V colour excess 83- 86 F4.2 mag AV Absorption in V band
Note (1): Photometry of OB stars in NGC 346 by Massey et al. (1989, Cat. J/AJ/98/1305) and from our ACS analysis. Colors and spectral types are also taken from Massey et al. (1989, Cat. J/AJ/98/1305).
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [BSS2007] Sequential number from Bolato et al., 2007, Cat. J/ApJ/655/212 5- 11 F7.4 deg RAdeg Right ascension in degrees (J2000) 13- 20 F8.4 deg DEdeg Declination in decimal degrees (J2000) 22- 26 F5.2 mag [3.6] ?=- IRAC 3.6um magnitude 28- 32 F5.2 mag [4.5] IRAC 4.5um magnitude 34- 38 F5.2 mag [5.8] IRAC 5.8um magnitude 40- 44 F5.2 mag [8.0] IRAC 8.0um magnitude 46- 49 F4.2 mag [24] ?=- MIPS 24um magnitude 51- 52 I2 ---- N* Numbers of stars found to coincide from our ACS photometry (Paper I) with the loci of these YSOs (within 1.5") 54- 58 F5.2 mag F555W F555W Vega magnitude 60- 64 F5.2 mag F814W F814W Vega magnitude
History: From electronic version of the journal References: Gouliermis et al., Paper I 2006ApJS..166..549G, Cat. J/ApJS/166/549 Rochau et al., Paper II 2007ApJ...664..322R
(End) Patricia Vannier [CDS] 07-Apr-2010
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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