J/MNRAS/506/1346 SFR in Local Volume late-type galaxies (Karachentsev+, 2021)
Local Volume late-type galaxies with an extreme ratio of Hα-to-FUV SFRs.
Karachentsev I.D., Kaisina E.I., Kaisin S.S.
<Mon. Not. R. Astron. Soc., 506, 1346-1354 (2021)>
=2021MNRAS.506.1346K 2021MNRAS.506.1346K (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby; Galaxies, photometry; Photometry, H-alpha
Keywords: galaxies: dwarf - galaxies: star formation - galaxies: statistics
Abstract:
Using a currently most representative sample of 477 late-type galaxies
within 11Mpc of the Milky Way with measured star formation rates
(SFRs) from the far-ultraviolet (FUV) and Hα emission line
fluxes, we select galaxies with the extreme ratios:
SFR(Hα)/SFR(FUV)>2 and SFR(Hα)/SFR(FUV)<1/20. Each
subsample amounts to ∼5 per cent of the total number and consists of
dwarf galaxies with the stellar masses M*/M☉=(5.5-9.5)dex. In
spite of a huge difference in their SFR(Hα) activity on a scale
of ∼10Myr, the temporarily 'excited' and temporarily 'quiescent'
galaxies follow one and the same relation between SFR(FUV) and M* on a
scale of ∼100Myr. Their average specific SFR
log[SFR(FUV)/M*]=-10.1±0.1yr-1) coinsides with the Hubble
parameter log(H0)=-10.14(yr-1). On a scale of t∼10Myr, variations
of SFR have a moderate flash amplitude of less than one order above
the main sequence and a fading amplitude to two orders below the
average level. In general, both temporarily excited and temporarily
quiescent galaxies have almost similar gas fractions as normal
main-sequence galaxies, being able to maintain the current rate of
star formation on another Hubble time-scale. Ranging the galaxies
according to the density contrast produced by the nearest massive
neighbour exhibits only a low average excess of SFR caused by tidal
interactions.
Description:
We present the sample of 476 late-type galaxies from the LV with SFR
estimated via the Hα and FUV fluxes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 55 476 Stellar masses and SFRS of late-type galaxies
in the LV
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See also:
J/ApJ/703/517 : The Spitzer Local Volume Legacy: IR photometry (Dale+, 2009)
J/ApJ/706/599 : Hα and UV SFR in the local volume (Lee+, 2009)
J/MNRAS/440/405 : Brightest galaxies in Local Volume (McCall, 2014)
J/AJ/150/94 : Chandra Local Volume Survey. I. (Binder+, 2015)
J/MNRAS/478/1611 : Local Volume H I Survey (LVHIS) (Koribalski+, 2018)
J/MNRAS/479/3509 : LVHIS. Far-infrared radio correlation (Shao+, 2018)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Galaxy name in well-known catalogs
20- 21 I2 h RAh Right Ascension (J2000)
22- 23 I2 min RAm Right Ascension (J2000)
24- 27 F4.1 s RAs Right Ascension (J2000)
28 A1 --- DE- Declination sign (J2000)
29- 30 I2 deg DEd Declination (J2000)
31- 32 I2 arcmin DEm Declination (J2000)
33- 34 I2 arcsec DEs Declination (J2000)
37- 41 F5.2 [Msun] logM* Log the stellar mass
43 A1 --- l_logSFRHa Limit flag on logSFRHa
44- 48 F5.2 [Msun/yr] logSFRHa Log H-alpha derived integral
star formation rate
50 A1 --- l_logSFRFUV Limit flag on logSFRFUV
51- 55 F5.2 [Msun/yr] logSFRFUV Log FUV derived integral
star formation rate
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Acknowledgements:
Serafim Kaisin, sskaisin(at)gmail.com
(End) Serafim Kaisin [SAO RAS, Russia], Patricia Vannier [CDS] 25-Nov-2021