TY - CONF
T1 - Correlations Between Type Ia Supernova Properties and Early-type Host Galaxy Spectra
AU - Meyers, Joshua
AU - Graves, G.
AU - Aldering, G. S.
AU - Amanullah, R.
AU - Barbary, K. H.
AU - Brown, P. J.
AU - Fakhouri, H.
AU - Hennawi, J.
AU - Lidman, C.
AU - Mendez, J.
AU - Nordin, J.
AU - Perlmutter, S.
AU - Rubin, D.
AU - Ruiz-Lapuente, P.
AU - Rykoff, E. S.
AU - Saunders, C.
AU - Spadafora, A. L.
AU - Suzuki, N.
AU - Cosmology Project, Supernova
PY - 2013/1/1
Y1 - 2013/1/1
N2 - We have obtained deep, very high signal-to-noise ratio spectra of a sample of 40 host galaxies of Type Ia supernovae (SNe). The host galaxies are chosen from the Nearby SN Factory, the SDSS SN Survey, and Swift-observed SNe, with the requirement that they have passive stellar populations. We perform a detailed stellar population analysis of the SN host galaxies, measuring their ages and the abundances of multiple elements, including Fe, Mg, C, N, and Ca. We find that the age and abundance patterns of the SN hosts are similar to those of a control sample of early-type SDSS galaxies. We rediscover the correlation between the SN decline rate and host galaxy age, and show that host [Mg/Fe], [C/Fe], and [N/Fe] enhancement are also correlated with SN decline rates. In contrast to studies of SNe with mixed host types, however, we do not see any evidence for correlations between SN Hubble residuals and early-type host galaxy properties, suggesting that Hubble residual correlations with host properties saturate at the domains of early-type galaxies.
AB - We have obtained deep, very high signal-to-noise ratio spectra of a sample of 40 host galaxies of Type Ia supernovae (SNe). The host galaxies are chosen from the Nearby SN Factory, the SDSS SN Survey, and Swift-observed SNe, with the requirement that they have passive stellar populations. We perform a detailed stellar population analysis of the SN host galaxies, measuring their ages and the abundances of multiple elements, including Fe, Mg, C, N, and Ca. We find that the age and abundance patterns of the SN hosts are similar to those of a control sample of early-type SDSS galaxies. We rediscover the correlation between the SN decline rate and host galaxy age, and show that host [Mg/Fe], [C/Fe], and [N/Fe] enhancement are also correlated with SN decline rates. In contrast to studies of SNe with mixed host types, however, we do not see any evidence for correlations between SN Hubble residuals and early-type host galaxy properties, suggesting that Hubble residual correlations with host properties saturate at the domains of early-type galaxies.
M3 - Paper
SP - 106.07
ER -