J/MNRAS/462/3766 List of galaxies with star forming regions (Cook+, 2016)
The connection between galaxy environment and the luminosity function slopes
of star-forming regions.
Cook D.O., Dale D.A., Lee J.C., Thilker D., Calzetti D., Kennicutt R.C.
<Mon. Not. R. Astron. Soc., 462, 3766-3799 (2016)>
=2016MNRAS.462.3766C 2016MNRAS.462.3766C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Star Forming Region
Keywords: galaxies: dwarf - galaxies: irregular - Local Group -
galaxies: spiral - galaxies: star clusters: general -
galaxies: star formation
Abstract:
We present the first study of GALEX far-ultraviolet (FUV) luminosity
functions of individual star-forming regions within a sample of 258
nearby galaxies spanning a large range in total stellar mass and star
formation properties. We identify ∼65000 star-forming regions
(i.e. FUV sources), measure each galaxy's luminosity function, and
characterize the relationships between the luminosity function slope
(α) and several global galaxy properties. A final sample of 82
galaxies with reliable luminosity functions are used to define these
relationships and represent the largest sample of galaxies with the
largest range of galaxy properties used to study the connection
between luminosity function properties and galaxy environment. We find
that α correlates with global star formation properties, where
galaxies with higher star formation rates and star formation rate
densities (ΣSFR) tend to have flatter luminosity function
slopes. In addition, we find that neither stochastic sampling of the
luminosity function in galaxies with low-number statistics nor the
effects of blending due to distance can fully account for these
trends. We hypothesize that the flatter slopes in high ΣSFR
galaxies is due to higher gas densities and higher star formation
efficiencies which result in proportionally greater numbers of bright
star-forming regions. Finally, we create a composite luminosity
function composed of star-forming regions from many galaxies and find
a break in the luminosity function at brighter luminosities. However,
we find that this break is an artefact of varying detection limits for
galaxies at different distances.
Description:
The local volume legacy (LVL) sample consists of 258 of our nearest
galaxy neighbours reflecting a statistically complete, representative
sample of the local universe. The sample selection and description are
detailed in Dale et al. (2009, Cat. J/ApJ/703/517).
The full LVL sample and basic properties are listed in Table 1.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 60 258 General galaxy properties
--------------------------------------------------------------------------------
See also:
J/ApJ/703/517 : The Spitzer Local Volume Legacy: IR photometry (Dale+, 2009)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 20 A20 --- Name Galaxy name
23- 24 I2 h RAh Right ascension (J2000)
26- 27 I2 min RAm Right ascension (J2000)
29- 33 F5.2 s RAs Right ascension (J2000)
36 A1 --- DE- Declination sign (J2000)
37- 38 I2 deg DEd Declination (J2000)
40- 41 I2 arcmin DEm Declination (J2000)
43- 46 F4.1 arcsec DEs Declination (J2000)
49- 53 F5.2 Mpc Dist Distance from Kennicutt et al.
(2008, Cat. J/ApJS/178/247)
59- 60 I2 --- Ttype Optical morphology from Kennicutt et al.
(2008, Cat. J/ApJS/178/247)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Mar-2018