J/MNRAS/514/5126 Star formation study of LSBs/STs galaxies (Narayanan+, 2022)
Are superthin galaxies low-surface-brightness galaxies seen edge-on?
The star formation probe.
Narayanan G., Banerjee A.
<Mon. Not. R. Astron. Soc. 514, 5126-5140 (2022)>
=2022MNRAS.514.5126N 2022MNRAS.514.5126N (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Optical ; Photometry ; Spectroscopy ; Infrared sources
Rotational velocities ; Positional data ; Ultraviolet ;
Stars, masses ; Star Forming Region
Keywords: dust, extinction - galaxy: evolution - galaxies: spiral -
galaxies: star formation - ultraviolet: galaxies
Abstract:
Superthin galaxies (STs) are edge-on disc galaxies with strikingly
high planar-to-vertical axes ratios of ∼10-20 with no bulge component,
and central surface brightness in the B band > 23 mag arcsec-2
comparable to low-surface-brightness galaxies (LSBs). Although STs and
LSBs have similar dynamical, stellar, and atomic hydrogen (H I)
masses on an average, it is tricky to conclude if they constitute the
same galaxy population, given the edge-on and face-on orientations of
the STs and the LSBs, respectively. We systematically study star
formation rate (SFR) in a sample of STs and LSBs using SED fitting of
photometric data in 10 bands including GALEX: FUV, NUV, SDSS :
u,g,r,i,z and 2MASS : J, H, Ks using stellar population synthesis
models employing the publicly available software MAGPHYS
(Multi-Wavelength Analysis of Galaxy Physical Properties). The
estimated median SFRs for LSBs and STs are 0.4+2.2-0.3 and
0.2+0.9-0.2 M☉.yr-1-, respectively. Our calculations
indicate that this deficit in the SFR of an ST can be attributed to
inclination and opacity effects. Therefore, we conclude that STs and
LSBs have equal intrinsic SFR over and above other physical
properties, which possibly implies that STs are just LSBs seen in
edge-on.
Description:
We compare and contrast the SFRs of STs and LSBs in a systematic
manner. We consider the STs from the RFGC (Karachentsev et al.
2000BSAO...50....5K 2000BSAO...50....5K, Cat. J/other/BSAO/50.5) and LSBs from Monnier
Ragaigne et al. (2003A&A...408...67M 2003A&A...408...67M, Cat. J/A+A/408/67). The
tablea1.dat and tablea2.dat list the B-band magnitude MB, distance,
asymptotic rotational velocity Vrot, axes ratios a/b, B-band central
surface brightness µB, and B-band diameter of the STs and LSBs
samples. For the sake of comparison, we also provide the above
properties of a subset of the sample of bulgeless disc galaxies from
Karachentseva et al. (2020Ap.....63..151K 2020Ap.....63..151K) in tablea3.dat. Most of
these above paremeters are available on HyperLeda database. For SED
fit with MAGPHYS algorithm, we present the input magnitude for our
sample LSBs and STs in tablea4.dat and tablea5.dat respectively. Then,
we provide modelled star formation properties in tablea6.dat and
tablea7.dat.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 48 63 *General physical properties of LSBs sample
tablea2.dat 48 53 *General physical properties of STs sample
tablea3.dat 48 66 *General physical properties of bulgeless spiral
galaxies
tablea4.dat 84 64 10 flux density inputs for SED fitting using
MAGPHYS for LSBs sample
tablea5.dat 84 45 10 flux density inputs for SED fitting using
MAGPHYS for STs sample
tablea6.dat 76 64 The modelled star formation property ouputs of
the SED fitting using MAGPHYS for LSBs sample
tablea7.dat 76 45 The modelled star formation property ouputs of
the SED fitting using MAGPHYS for STs sample
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Note on tablea1.dat: We have chosen the LSBs sample from the NIR catalogue of
LSBs of Monnier Ragaigne et al. (2003A&A...408...67M 2003A&A...408...67M, Cat. J/A+A/408/67).
Note on tablea2.dat: The ST sample was chosen from Karachentsev et al.
(2003yCatp011005001K 2003yCatp011005001K Cat. J/other/BSAO/50.5).
Note on tablea3.dat: We also provide the above properties of a subset of the
sample of bulgeless disc galaxies from Karachentseva et al.
(2020Ap.....63..151K 2020Ap.....63..151K).
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See also:
J/ApJ/847/136 : Hβ to N2 line fluxes of nearby galaxies (Brown+, 2017)
J/ApJ/703/1672 : Far-IR and Hα fluxes in galaxies (Kennicutt+, 2009)
J/ApJS/242/11 : Hα imaging survey of the 40% ALFALFA HI LSBGs
(Lei+, 2019)
J/A+A/408/67 : LSB galaxies in near-infrared. II. (Monnier-Ragaigne+,2003)
J/other/BSAO/50.5 : Velocities of RFGC galaxies (Karachentsev+, 2000)
V/139 : The SDSS Photometric Catalog, Release 9
(Adelman-McCarthy+, 2012)
VII/237 : HYPERLEDA. I. Catalog of galaxies (Paturel+, 2003)
VII/219 : Revised Flat Galaxy Catalogue (RFGC) (Karachentsev+, 1999)
VII/115 : Surface Photometry of ESO-Uppsala Galaxies (Lauberts+ 1989)
II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7)
(Bianchi+ 2017)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
Byte-by-byte Description of file: tablea1.dat tablea2.dat tablea3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Galaxy Name of the galaxy (Name)
13- 17 F5.2 mag Bmag B-band apparent magnitude (MB)
19- 24 F6.2 Mpc D Distance (Distance)
26- 31 F6.2 km/s Vrot ? Asymptotic rotational velocity (Vrot)
33- 36 F4.2 --- a/b Ratio of isophotal minor and major axes
(a/b)
38- 42 F5.2 mag/arcsec2 SB B-band central surface brightness
(µB)
44- 48 F5.2 kpc Diam B-band galaxy diameter (Diameter)
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Byte-by-byte Description of file: tablea4.dat tablea5.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Id Identifier name of the galaxy (Name)
6- 12 E7.1 Jy FFUV GALEX FUV flux density (FUV)
14- 20 E7.1 Jy FNUV GALEX NUV flux density (NUV)
22- 28 E7.1 Jy FSDSSu SDSS u-band flux density (SDSSu)
30- 36 E7.1 Jy FSDSSg SDSS g-band flux density (SDSSg)
38- 44 E7.1 Jy FSDSSr SDSS r-band flux density (SDSSr)
46- 52 E7.1 Jy FSDSSi SDSS i-band flux density (SDSSi)
54- 60 E7.1 Jy FSDSSz SDSS z-band flux density (SDSSz)
62- 68 E7.1 Jy F2MASSJ 2MASS J-band flux density (J)
70- 76 E7.1 Jy F2MASSH 2MASS H-band flux density (H)
78- 84 E7.1 Jy F2MASSKs 2MASS Ks-band flux density (Ks)
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Byte-by-byte Description of file: tablea6.dat tablea7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Id Identifier name of the galaxy (Name)
6- 13 E8.2 Msun M* Stellar mass (Mstar)
15- 22 E8.2 1/yr sSFR Specific star formation rate (sSFR)
24- 31 E8.2 Msun/yr SFR Star formation rate (SFR)
33- 40 E8.2 Lsun Ldust Luminosity of dust (Ldust)
42- 49 E8.2 Msun Mdust Dust mass (Mdust)
51- 58 E8.2 1/Gyr Gamma Star formation time-scale parameter (γ)
60- 67 E8.2 --- Nburst Number of formation bursts since in the age
of tform (Nbursts)
69- 76 E8.2 Gyr tf Age of the oldest population (tform)
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History:
From electronic version of the journal
References:
Karachentseva et al., 2020Ap.....63..151K 2020Ap.....63..151K
(End) Luc Trabelsi [CDS] 15-Apr-2025