J/MNRAS/490/718 Properties of 109 SNe and their 104 hosts (Barkhudaryan+, 2019)
Supernovae and their host galaxies.
VI. Normal Type Ia and 91bg-like supernovae in ellipticals.
Barkhudaryan L.V., Hakobyan A.A., Karapetyan A.G., Mamon G.A.,
Kunth D., Adibekyan V., Turatto M.
<Mon. Not. R. Astron. Soc. 490, 718-732 (2019)>
=2019MNRAS.490..718B 2019MNRAS.490..718B (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Galaxies, optical ; Galaxy catalogs ;
Positional data ; Surveys
Keywords: supernovae: individual: Type Ia - galaxies: abundances -
galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: star formation - galaxies: stellar content
Abstract:
We present an analysis of the galactocentric distributions of the
'normal' and peculiar '91bg-like' subclasses of 109 supernovae (SNe)
Ia, and study the global parameters of their elliptical hosts. The
galactocentric distributions of the SN subclasses are consistent with
each other and with the radial light distribution of host stellar
populations, when excluding bias against central SNe. Among the global
parameters, only the distributions of u - r colours and ages are
inconsistent significantly between the ellipticals of different SN Ia
subclasses: the normal SN hosts are on average bluer/younger than
those of 91bg-like SNe. In the colour-mass diagram, the tail of colour
distribution of normal SN hosts stretches into the Green Valley -
transitional state of galaxy evolution, while the same tail of
91bg-like SN hosts barely reaches that region. Therefore, the
bluer/younger ellipticals might have more residual star formation that
gives rise to younger 'prompt' progenitors, resulting in normal SNe Ia
with shorter delay times. The redder and older ellipticals that
already exhausted their gas for star formation may produce
significantly less normal SNe with shorter delay times, outnumbered by
'delayed' 91bg-like events. The host ages (lower age limit of the
delay times) of 91bg-like SNe does not extend down to the stellar ages
that produce significant u-band fluxes - the 91bg-like events have no
prompt progenitors. Our results favour SN Ia progenitor models such as
He-ignited violent mergers that have the potential to explain the
observed SN/host properties.
Description:
The full database of 109 individual SNe Ia (SN designation, subclass,
source of the subclass, offset from host galaxy nucleus, and
fractional radial g-band flux) and their 104 elliptical hosts (galaxy
SDSS designation, distance, elongation, position angle, Re,
corrected D25, ugriz-band absolute magnitudes, and
luminosity-weighted age).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 179 109 Properties of 109 SNe and their 104 hosts
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
J/A+A/544/A81 : Supernovae and their hosts in SDSS DR8 (Hakobyan+, 2012)
J/MNRAS/444/2428 : Disturbance levels of SNe host galaxies (Hakobyan+, 2014)
J/MNRAS/456/2848 : Properties of 500 SNe and their 419 hosts (Hakobyan+, 2016)
J/MNRAS/459/3130 : Lists of arm and interarm supernovae (Aramyan+, 2016)
http://www.sdss.org : SDSS Home Page
https://sne.space : The Open Supernova Catalog
Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 29 A29 --- SN Supernova (SN) designation
31- 34 A4 --- Type SN subclass (1)
36- 64 A29 --- REF Source of SN subclass
66- 70 F5.1 arcsec oRA SN offset right ascension from host galaxy
nucleus, in the E/W direction
71 A1 --- n_oRA [EW] E/W direction of SN offset oRA
73- 76 F4.1 arcsec oDE SN offset declination from host galaxy
nucleus, in the N/S direction
77 A1 --- n_oDE [NS] N/S direction of SN offset oDE
79- 82 F4.2 --- Frg ? SN fractional radial g-band flux
84- 87 F4.2 --- iFrg ? SN inner-truncated fractional flux
89-107 A19 --- Gal SN host galaxy identification (2)
109-115 F7.3 Mpc Dist Host galaxy distance
117-121 F5.3 --- a/b Host galaxy axial ratio
123-125 I3 deg PA Host galaxy position angle
127-131 F5.2 arcsec Reff Host galaxy effective radius in g-band
133-138 F6.2 arcsec Diam Host galaxy diameter in g-band (3)
140-145 F6.2 mag uMag Host galaxy u-band absolute magnitude
147-152 F6.2 mag gMag Host galaxy g-band absolute magnitude
154-159 F6.2 mag rMag Host galaxy r-band absolute magnitude
161-166 F6.2 mag iMag Host galaxy i-band absolute magnitude
168-173 F6.2 mag zMag Host galaxy z-band absolute magnitude
175-179 I5 Myr Age Host galaxy luminosity-weighted age in Myr
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Note (1): Note on SN subclass as follows:
norm = normal Type Ia SNe
91bg = subluminous 91bg-like SNe
06gz = extremely luminous super-Chandrasekhar (06gz-like) SNe
Note (2): JHHMMSS.ss+DDMMSS.s for SDSS JHHMMSS.ss+DDMMSS.s
An alternative name is mentioned when SDSS identification was not
possible to obtain.
Note (3): Corrected major axis in arcsec (isophotal level of 25 mag/arcsec2
in the SDSS g-band) of the host galaxy.
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Acknowledgements:
Artur Hakobyan, hakobyan(at)bao.sci.am
References:
Hakobyan et al., Paper I 2012A&A...544A..81H 2012A&A...544A..81H, Cat. J/A+A/544/A81
Hakobyan et al., Paper II 2014MNRAS.444.2428H 2014MNRAS.444.2428H, Cat. J/MNRAS/444/2428
Hakobyan et al., Paper III 2016MNRAS.456.2848H 2016MNRAS.456.2848H, Cat. J/MNRAS/456/2848
Aramyan et al., Paper IV 2016MNRAS.459.3130A 2016MNRAS.459.3130A, Cat. J/MNRAS/459/3130
Hakobyan et al., Paper V 2017MNRAS.471.1390H 2017MNRAS.471.1390H, Cat. J/MNRAS/471/1390
(End) Artur Hakobyan [BAO], Patricia Vannier [CDS] 06-Nov-2019