J/MNRAS/505/L52 Properties of 185 SNe Ia and their 180 hosts (Hakobyan+, 2021)
Type Ia supernovae in the star formation deserts of spiral host galaxies.
Hakobyan A.A., Karapetyan A.G., Barkhudaryan L.V., Gevorgyan M.H.,
Adibekyan V.
<Mon. Not. R. Astron. Soc., 505, L52-57 (2021)>
=2021MNRAS.505L..52H 2021MNRAS.505L..52H (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Galaxies, nearby ; Galaxy catalogs ; Surveys
Keywords: supernovae: individual: Type Ia - galaxies: bar - galaxies: disc -
galaxies: star formation - galaxies: stellar content
Abstract:
Using a sample of nearby spiral galaxies hosting 185 supernovae (SNe)
Ia, we perform a comparative analysis of the locations and light-curve
decline rates (Δm15) of normal and peculiar SNe Ia in the star
formation deserts (SFDs) and beyond. To accomplish this, we present a
simple visual classification approach based on the UV/H α images
of the discs of host galaxies. We demonstrate that, from the
perspective of the dynamical time-scale of the SFD, where the star
formation is suppressed by the bar evolution, the Δm15 of SN
Ia and progenitor age can be related. The SFD phenomenon gives an
excellent possibility to separate a subpopulation of SN Ia progenitors
with ages older than a few Gyr. We show, for the first time, that the
SFDs contain mostly faster declining SNe Ia (Δm15>1.25). For
the galaxies without SFDs, the region within the bar radius, and outer
disc contain mostly slower declining SNe Ia. To better constrain the
delay times of SNe Ia, we encourage new studies (e.g. integral field
observations) using the SFD phenomenon on larger and more robust
datasets of SNe Ia and their host galaxies.
Description:
The database of 185 individual SNe Ia (SN name, location, deprojected,
and R25-normalized galactocentric distance) and their 180 hosts
(galaxy name, morphological type, bar detection, discs class, and
demarcation radius).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 87 185 Properties of 185 SNe and their 180 hosts
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See also:
J/MNRAS/499/1424 : Properties of 407 SNe and their 394 hosts (Hakobyan+, 2020)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- SN Supernova (SN) name
13- 34 A22 --- Gal SN host galaxy name
36- 38 A3 --- MType Galaxy morphological type
40 A1 --- u_MType [:?] Uncertainty flag on morphology (1)
42 A1 --- Bar [B] Presence of bar in the host galaxy
44 A1 --- u_Bar [:?] Uncertainty flag on bar (2)
46- 48 A3 --- clDisc Star formation (SF) class of galaxy disc (3)
50 A1 --- u_clDisc [:?] Uncertainty flag on SF class (4)
52- 61 A10 --- SNloc SN location
63 A1 --- u_SNloc [:] Uncertainty flag on SN location (5)
65- 75 F11.9 --- Rsn Deprojected and normalized galactocentric
distance of SN
77- 87 F11.9 --- Rdem ? Host galaxy demarcation radius
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Note (1): Uncertainties in host galaxy morphological type are marked by ":"
and "?" (highly uncertain).
Note (2): Uncertainties in host galaxy bar are marked by ":" and "?" (highly
uncertain).
Note (3): Note on SF class of galaxy disc as follows:
I = SF is distributed along the entire length of the unbarred disc
(from the centre to the edge)
II = like in the first case, but for the barred disc
(SF is along the bar, without star formation desert)
III = SF is along the bar, or SF might occur only at the bar ends
(with star formation desert)
IV = SF is distributed along the unbarred disc, except the central
star formation desert
Note (4): Uncertainties in SF class of galaxy disc are marked by ":"
and "?" (highly uncertain).
Note (5): Uncertainties in SN location are marked by ":".
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Acknowledgements:
Artur Hakobyan, artur.hakobyan(at)yerphi.am
References:
Hakobyan et al., 2020MNRAS.499.1424H 2020MNRAS.499.1424H, Cat. J/MNRAS/499/1424
(End) Artur Hakobyan [YerPHI], Patricia Vannier [CDS] 03-Sep-2021