J/AJ/146/46 Star Formation Rate in nearby galaxies (Karachentsev+, 2013)
Star formation properties in the Local Volume galaxies via Hα and
far-ultraviolet fluxes.
Karachentsev I.D., Kaisina E.I.
<Astron. J., 146, 46 (2013)>
=2013AJ....146...46K 2013AJ....146...46K
ADC_Keywords: Galaxy catalogs ; Galaxies, nearby ; Morphology
Keywords: catalogs - galaxies: dwarf - galaxies: evolution - stars: formation -
surveys
Abstract:
A distance-limited sample of 869 objects from the Updated Nearby
Galaxy Catalog is used to characterize the star formation status of
the Local Volume population. We present a compiled list of 1217 star
formation rate (SFR) estimates for 802 galaxies within 11Mpc, derived
from the Hα imaging surveys and the GALEX far-ultraviolet
survey. We briefly discuss some basic scaling relations between SFR
and luminosity, morphology, HI mass, surface brightness, and the
environment of the galaxies. About 3/4 of our sample consist of dwarf
galaxies, for which we offer a more refined classification. We note
that the specific SFR of nearly all luminous and dwarf galaxies does
not exceed the maximum value: log(SFR/LK)=-9.4[yr-1]. Most spiral
and blue dwarf galaxies have enough time to generate their stellar
mass during the cosmological time, T0, with the observed SFRs. They
dispose of a sufficient amount of gas to support their present SFRs
over the next T0term. We note that only a small fraction of BCD, Im,
and Ir galaxies (about 1/20) proceed in a mode of vigorous starburst
activity. In general, the star formation history of spiral and blue
dwarf galaxies is mainly driven by their internal processes. The
present SFRs of E, S0, and dSph galaxies typically have 1/30-1/300 of
their former activity.
Description:
A distance-limited sample of 869 objects from the Updated Nearby
Galaxy Catalog (Karachentsev et al., 2013, cat. J/AJ/145/101) is used
to characterize the star formation status of the Local Volume
population. We discuss the available observational data on the current
rate of star formation in the galaxies with distances D<11Mpc, which
was determined from the integral flux of the galaxy in the emission
Hα line or from the far-ultraviolet flux, obtained at the GALEX
orbital telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 91 802 List of the nearby galaxies with measured SFR
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See also:
J/AJ/145/101 : Updated nearby galaxy catalog (Karachentsev+, 2013)
J/ApJS/192/6 : A GALEX UV imaging survey of nearby galaxies (Lee+, 2011)
J/ApJS/173/185 : GALEX ultraviolet atlas of nearby galaxies (Gil de Paz+, 2007)
J/ApJS/165/307 : Survey for ionization in neutral gas gal.. I. (Meurer+, 2006)
J/AJ/128/2170 : Hα imaging of irregular galaxies (Hunter+, 2004)
J/A+A/414/23 : CCD Hα and R photometry of 334 galaxies (James+, 2004)
J/ApJS/147/29 : BRHa data of blue compact dwarf galaxies (Gil De Paz+, 2003)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Galaxy name
20- 21 I2 h RAh Hour of Right Ascension (J2000)
23- 24 I2 min RAm Minute of Right Ascension (J2000)
26- 29 F4.1 s RAs Second of Right Ascension (J2000)
31 A1 --- DE- Sign of the Declination (J2000)
32- 33 I2 deg DEd Degree of Declination (J2000)
35- 36 I2 arcmin DEm Arcminute of Declination (J2000)
38- 39 I2 arcsec DEs Arcsecond of Declination (J2000)
41- 42 I2 --- TT [-3/11] de Vaucouleurs morphological type (1)
44- 49 F6.2 mag BMag ? Absolute B band magnitude (2)
51 A1 --- l_SFRa [<] Upper limit flag on SFRHa
52- 56 F5.2 [Msun/yr] SFRa ? Hα derived integral Star Formation
Rate (2)
58 A1 --- l_Pa [<] Upper limit flag on PHa
59- 63 F5.2 [yr-1] Pa ? Hα derived evolutionary P parameter (3)
65 A1 --- l_Fa [>] Lower limit flag on FHa
66- 70 F5.2 [-] Fa ? Hα derived evolutionary F parameter (3)
72 A1 --- l_SFRu [<] Upper limit flag on SFRFUV
73- 77 F5.2 [Msun/yr] SFRu ? FUV derived integral Star Formation Rate (2)
79 A1 --- l_Pu [<] Upper limit flag on PFUV
80- 84 F5.2 [yr-1] Pu ? FUV derived evolutionary P parameter (3)
86 A1 --- l_Fu [>] Lower limit flag on FFUV
87- 91 F5.2 [-] Fu ? FUV derived evolutionary F parameter (3)
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Note (1): From de Vaucouleurs et al. (1991, cat. VII/155). Morphological type
are: 2-8=Sa-Sdm; 9=irregular magellanic, Im and Blue Compact Dwarf (BCD);
10=dwarf irregular, Ir. See Table1 for more details.
Note (2): Corrected for the Galactic and internal extinction.
Note (3): Corrected for the Galactic and internal extinction. To characterize
the evolutionary status of a sample of galaxies, Karachentsev & Kaisin
(2007AJ....133.1883K 2007AJ....133.1883K) proposed a diagnostic "past-future" (PF) diagram,
where the dimensionless parameters P=log(SFR.T0/LK) and
F=log(1.85MH1/SFR.T0) are independent from errors in finding
distances to the galaxies. The parameter P is actually the sSFR
(specific star formation rate) over the entire age scale of the
universe, T0=13.7Gyr. The F parameter corresponds to the notion
of gas depletion time, expressed in units of T0. The coefficient
1.85 at MHI is introduced in order to account for the contribution
of helium and molecular hydrogen to the total mass of the gas
(Fukugita & Peebles, 2004ApJ...616..643F 2004ApJ...616..643F).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 30-Jun-2014