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J/ApJ/653/240     Low-mass SDSS dwarf galaxy properties      (Geha+, 2006)

The baryon content of extremely low mass dwarf galaxies. Geha M., Blanton M.R., Masjedi M., West A.A. <Astrophys. J., 653, 240-254 (2006)> =2006ApJ...653..240G
ADC_Keywords: Galaxies, photometry ; H I data ; Morphology Keywords: galaxies: dwarf - galaxies: kinematics and dynamics Abstract: We investigate the gas content and baryonic Tully-Fisher relationship for extremely low luminosity dwarf galaxies in the absolute magnitude range -13.5>Mr-5logh70>-16. The sample is selected from the Sloan Digital Sky Survey and consists of 101 galaxies for which we have obtained follow-up HI observations using the Arecibo Observatory and Green Bank Telescope. This represents the largest homogeneous sample of dwarf galaxies at low luminosities with well-measured HI and optical properties. The sample spans a range of environments, from dense groups to truly isolated galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 105 101 Low-Mass SDSS Dwarf Galaxy Properties
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- Name Galaxy name (1) 8- 9 I2 h RAh Right ascension (J2000.0) 11- 12 I2 min RAm Right ascension (J2000.0) 14- 17 F4.1 s RAs Right ascension (J2000.0) 19 A1 --- DE- Declination sign (J2000.0) 20- 21 I2 deg DEd Declination (J2000.0) 23- 24 I2 arcmin DEm Declination (J2000.0) 26- 29 F4.1 arcsec DEs Declination (J2000.0) 31- 34 F4.1 Mpc Dist Distance (in Mpc/h70) (3) 36- 40 F5.2 mag rmag Apparent r magnitude (2) 42- 47 F6.2 mag rMAG Absolute r magnitude (2) 49- 52 F4.2 mag g-r g-r colour index (2) 54- 57 F4.1 mag/arcsec2 mueff Effective surface brightness in r band (4) 59- 61 F3.1 kpc reff Effective radius in r band, in kpc (4) 63 A1 --- --- [(] 64- 67 F4.1 arcsec reff2 Effective radius in r band, in arcsec (4) 68 A1 --- --- [)] 70- 73 F4.2 --- b/a Axis ratio (b/a) (4) 75- 78 F4.2 [solMass] logMstar Star mass (5) 80- 83 F4.2 [solMass] logMHI ? HI mass (10) (6) 85- 88 F4.2 [solMass] e_logMHI ? rms uncertainty on HI mass (10) (9) 90- 94 F5.1 km/s Wh ? HI velocity half-width at 20% (10) (7) 96-100 F5.1 km/s Wh(i,t) ? HI half-width corrected for inclination and turbulence (10) (8) 102-105 F4.1 km/s e_Wh(i,t) ? rms uncertainty on Wh(i,t) (9) (10)
Note (1): Galaxy names are based on position in the Blanton et al. (2005AJ....129.2562B) low-luminosity SDSS catalog. In Simbad, galaxies identified as SDSS Note (2): Absolute magnitudes and colors have been corrected for Galactic extinction based on Schlegel et al. (1998ApJ...500..525S). Note (3): Distances are estimated based on a model of the local velocity field (Willick et al., 1997ApJ...486..629W) and assume Note (4): The effective surface brightness (mueff,r), effective half-light radius (reff,r), and axis ratio (b/a) are measured from the SDSS r-band images. Note (5): Stellar masses are calculated based on Bell et al. (2003ApJS..149..289B) and a Kroupa et al. (1993MNRAS.262..545K) initial mass function. Note (6): HI masses are based on our Arecibo and GBT observations. Note (7): The HI velocity half-width, Wh (W20/2), is the observed uncorrected 20% peak HI half-width. Note (8): The quantity Wh(i,t) (W20i,t/2) is the HI half-width corrected for inclination and turbulence as described in Sect. 3.2. Note (9): Errors on the HI mass and HI line width were calculated from the scatter in the mean quantities recovered from Monte Carlo simulations. Note (10): Galaxies that were not detected in the radio do not have HI properties listed in this table.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 31-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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