J/ApJ/950/108 Spectroscopic analysis of ASAS-SN SNe Ia (Holoien+, 2023)
Examining the properties of low-luminosity hosts of Type Ia supernovae from
ASAS-SN.
Holoien T.W.-S., Berger V.L., Hinkle J.T., Galbany L., Strom A.L.,
Vallely P.J., Anderson J.P., Boutsia K., French K.D., Kochanek C.S.,
Kuncarayakti H., Lyman J.D., Morrell N., Prieto J.L., Sanchez S.F.,
Stanek K.Z., Walth G.L.
<Astrophys. J., 950, 108 (2023)>
=2023ApJ...950..108H 2023ApJ...950..108H
ADC_Keywords: Supernovae; Spectra, optical; Redshifts; Galaxies, nearby;
Abundances; Magnitudes, absolute; Infrared
Keywords: Type Ia supernovae ; Supernovae ; Galaxy abundances
Abstract:
We present a spectroscopic analysis of 44 low-luminosity host galaxies
of Type Ia supernovae (SNe Ia) detected by the All-Sky Automated
Survey for Supernovae (ASAS-SN), using hydrogen, oxygen, and sulfur
emission lines to measure metallicities and star formation rates. We
find no statistically significant evidence that the star formation
activity and metallicities of the galaxies in our sample are
inconsistent with galaxies of similar luminosities and masses. We
identify two 3σ outlier galaxies that have high metallicities
for their stellar masses, but find that their other properties are
consistent with general galaxies. The overall consistency between our
sample and general galaxy samples further strengthens the evidence
from more luminous SN Ia host galaxy samples that SN Ia host galaxies
are typical.
Description:
To select a representative sample of low-luminosity host galaxies of
SNe Ia, we first started with the sample of SN Ia used by
Brown+ 2019, J/MNRAS/484/3785 to measure the relative specific SN Ia
rate from the first 3yr of ASAS-SN.
The final sample presented here comprises 44 of these galaxies, for
which we were able to obtain spectra with high enough signal-to-noise
ratios (S/Ns) to measure the emission line fluxes needed for our
analyses. These are primarily Hα, Hβ, the
[OIII]λ4959/5007 doublet, and the [NII]λ6548/6583
doublet, though we also measure several others when possible.
The telescopes and instruments used to obtain the spectra for our
sample were:
(1) the Inamori-Magellan Areal Camera and Spectrograph (IMACS) on
the 6.5m Magellan-Baade telescope;
(2) the Low-Dispersion Survey Spectrograph 3 (LDSS-3) on the 6.5m
Magellan Clay telescope;
(3) the Multi-Object Double Spectrograph (MODS) on the dual 8.4m Large
Binocular Telescope (LBT);
(4) the Multi-Unit Spectroscopic Explorer (MUSE), located at the
Nasmyth B focus of Yepun, the Very Large Telescope UT4 telescope at
Cerro Paranal Observatory; and
(5) the Potsdam Multi-Aperture Spectrograph (PMAS) mounted on the 3.5m
telescope of the Centro Astronomico Hispano Aleman at the Calar Alto
Observatory.
With the exception of the MUSE and PMAS spectra, these spectra
consisted of longslit spectra obtained at the parallactic angle and
centered on the host nucleus, with total integration times typically
between 1 and 4hr. We chose to center our spectra on the host nuclei,
as the majority of the galaxies in our sample are either too small to
differentiate the location of the SN from the host nucleus or too
diffuse to obtain a high-S/N spectrum at the SN location.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 660 Emission line fluxes of our low-luminosity SN Ia
host galaxy sample
table2.dat 210 44 Physical properties of our low-luminosity SN Ia
host galaxy sample
fig2/* . 53 *Individual spectra in MRT format
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Note on fig2/* : The directory contains nine additional galaxies that were
observed, but are not included in our analyses as they did not yield
well-measured emission line fluxes.
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See also:
VII/233 : 2MASS All-Sky Extended Source Catalog (XSC) (IPAC/UMass, 2003-2006)
II/328 : AllWISE Data Release (Cutri+ 2013)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
J/ApJ/560/566 : K-band galaxy LF from 2MASS (Kochanek+, 2001)
J/A+A/459/85 : O/H & gas densities in star-forming galaxies (Nagao+, 2006)
J/ApJS/178/247 : Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008)
J/ApJ/707/1449 : Local hosts of SNe Ia (Neill+, 2009)
J/ApJ/722/566 : Host gal. of SNe Ia in SDSS-II SN survey (Lampeitl+, 2010)
J/MNRAS/406/782 : Type Ia supernovae luminosities (Sullivan+, 2010)
J/ApJ/770/107 : Host galaxies of SNIa from SNfactory (Childress+, 2013)
J/MNRAS/438/1391 : Host galaxies of Type Ia SN from PTF (Pan+, 2014)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/MNRAS/448/732 : Type Ia SN environment within host gal. (Anderson+, 2015)
J/ApJ/812/31 : Local Star Formation effects on type Ia SNe (Jones+, 2015)
J/MNRAS/471/4966 : ASAS-SN bright supernova catalogue 2016 (Holoien+, 2017)
J/MNRAS/467/1098 : ASAS-SN bright supernova catalogue 2015 (Holoien+, 2017)
J/MNRAS/464/2672 : ASAS-SN bright supernova catalog 2013-2014 (Holoien+, 2017)
J/ApJ/841/48 : UBVR and IR photometry of SN 2011fe (Ia) (Shappee+, 2017)
J/ApJ/855/107 : PMAS Integral-field SN hosts COmpilation (Galbany+, 2018)
J/ApJ/863/134 : SDSS low-metallicity blue compact dwarf gal. (Hsyu+, 2018)
J/ApJ/867/108 : Stellar masses & rest-frame u-g of SNIa (Jones+, 2018)
J/ApJ/854/24 : Environmental dependence of SN Ia luminosities (Kim+, 2018)
J/A+A/615/A68 : Type Ia supernova luminosities (Roman+, 2018)
J/MNRAS/484/3785 : Relative specific Type Ia supernovae rate (Brown+, 2019)
J/ApJ/874/32 : Environment and hosts of Type Ia supernovae (Rose+, 2019)
J/ApJ/870/13 : K2 LC alternative analysis of ASASSN-18bt (Shappee+, 2019)
J/A+A/644/A176 : Sample of 141 SNe Ia (Rigault+, 2020)
J/MNRAS/494/4426 : Effect of host galaxies on SN luminosity (Smith+, 2020)
J/MNRAS/493/1044 : Nebular spectra of 111 Type Ia supernovae (Tucker+, 2020)
J/ApJ/923/197 : SNIa observed in H-band with UV-opt. LCs (Ponder+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 38 A38 --- Gal Name of the galaxy (G1)
40- 48 A9 --- x_Value Units for Value
50- 64 A15 --- Line Line identifier and wavelength (1)
66- 72 F7.2 --- Value [0.08/8394]? Value of Line (1)
74- 80 F7.2 --- e_Value [0.04/1026]? Uncertainty in Value
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Note (1): The first 13 entries for each target are the emission line
fluxes, corrected for underlying stellar absorption and internal
reddening, in units of 10-17erg/s/cm2. The next 2 entries give
the Halpha and Hbeta equivalent widths in Angstroms.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 38 A38 --- Gal Name of the galaxy (G1)
40- 62 A23 --- SN Name of the supernova
64- 71 F8.6 --- z [0.008/0.052] Galaxy redshift
73 A1 --- f_z [*] Flag on z (1)
75- 79 F5.1 Mpc Dist [35.1/229.0] Distance to galaxy
81 A1 --- l_Mass Limit flag on Mass
83- 86 F4.2 Msun Mass [6.49/9.5] Stellar mass
88- 91 F4.2 Msun e_Mass [0.01/1.61]? Lower uncertainty on Mass
93- 96 F4.2 Msun E_Mass [0.01/1]? Upper uncertainty on Mass
98 A1 --- l_Metal Limit flag on Metallicity
100- 103 F4.2 --- Metal [8.27/8.8]? Metallicity (2)
105- 108 F4.2 --- e_Metal [0/0.12]? Lower uncertainty on Metal
110- 113 F4.2 --- E_Metal [0/0.16]? Upper uncertainty on Metal
115- 119 F5.2 Msun/yr SFR [-3.33/-0.16] Star formation rate
121- 124 F4.2 Msun/yr e_SFR [0/0.8] Lower uncertainty on SFR
126- 129 F4.2 Msun/yr E_SFR [0/0.3] Upper uncertainty on SFR
131 A1 --- l_sSFR Limit flag on sSFR
133- 138 F6.3 Gyr-1 sSFR [-2.52/0.33] Specific star formation rate
140- 143 F4.2 Gyr-1 e_sSFR [0.01/1.8]? Lower uncertainty on sSFR
145- 148 F4.2 Gyr-1 E_sSFR [0.01/1.7]? Upper uncertainty on sSFR
150 A1 --- l_KsMag Limit flag on KsMag
152- 157 F6.2 mag KsMag [-19.7/-15.3] Absolute Ks-band magnitude (3)
159- 162 F4.2 mag e_KsMag [0.1/0.2]? Uncertainty on KsMag (3)
164- 204 A41 --- File Name of the MRT file; column added by CDS
206- 210 A5 --- Inst Instrument used for the spectrum;
column added by CDS (4)
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Note (1): Flag as follows:
* = Redshifts that had not been previously measured in archival
data or that differ substantially from archival measurements.
Note (2): Metallicities are calculated using the N2 method of
Curti+ 2017MNRAS.465.1384C 2017MNRAS.465.1384C
Note (3): Ks-band magnitudes are taken from the 2MASS catalogs when
available, or calculated from the WISE W1-band magnitudes when
not. If the galaxy is not detected in either catalog, we assume
an upper limit of MKs>15.6, as described in the text.
Note (4): Instrument as follows:
LDSS = the Low-Dispersion Survey Spectrograph 3 (LDSS-3) on the 6.5m
Magellan Clay telescope (22 occurrences)
MODS = the Multi-Object Double Spectrograph on the dual 8.4m Large
Binocular Telescope (LBT; 9 occurrences)
MUSE = the Multi-Unit Spectroscopic Explorer, located at the Nasmyth B
focus of Yepun, the Very Large Telescope UT4 telescope at
Cerro Paranal Observatory (6 occurrences)
IMACS = the Inamori-Magellan Areal Camera and Spectrograph on
the 6.5m Magellan-Baade telescope (6 occurrences)
PMAS = the Potsdam Multi-Aperture Spectrograph mounted on the 3.5m telescope
of the Centro Astronomico Hispano Aleman at the Calar Alto
Observatory (1 occurrence)
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Global notes:
Note (G1): Galaxies that have not been previously catalogued by any
survey are given the name "Uncatalogued" with the associated
supernova name in parentheses.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 01-Aug-2025