Clustering of supernova Ia host galaxies

Abstract

For the first time the cross-correlation between type Ia supernova host galaxies and surrounding field galaxies is measured using the Supernova Legacy Survey sample. Over the z=0.2 to 0.9 redshift range we find that supernova hosts are correlated an average of 60% more strongly than similarly selected field galaxies over the 3-100 arcsec range and about a factor of 3 more strongly below 10 arcsec. The correlation errors are empirically established with a jackknife analysis of the four SNLS fields. The hosts are more correlated than the field at a significance of 99% in the fitted amplitude and slope, with the point-by-point difference of the two correlation functions having a reduced ${\chi }^2$ for 8 degrees of freedom of 4.3, which has a probability of random occurrence of less than 3x10^{-5}. The correlation angle is 1.5+/-0.5 arcsec, which deprojects to a fixed co-moving correlation length of approximately 6.5+/- 2/h mpc. Weighting the field galaxies with the mass and star formation rate supernova frequencies of the simple A+B model produces good agreement with the observed clustering. We conclude that these supernova clustering differences are primarily the expected outcome of the dependence of supernova rates on galaxy masses and stellar populations with their clustering environment.

ApJ (Letts) accepted

References in corpus (11)

• The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
• Rates and properties of type Ia supernovae as a function of mass and star-formation in their host galaxies
• Evolutionary synthesis of galaxies at high spectral resolution with the code PEGASE-HR
• The Type Ia Supernova Rate
• The rates of Type Ia Supernovae. I. Analytical Formulations
• Photometric redshifts from evolutionary synthesis with PEGASE: the code ZPEG and the z=0 age constraint
• Predicted and observed evolution in the mean properties of Type Ia supernovae with redshift
• The supernova rate in local galaxy clusters
• Supernovae in Low-Redshift Galaxy Clusters: the Type-Ia Supernova Rate
• On the cross-correlation of sub-mm sources and optically-selected galaxies
• Type Ia Supernovae Rates and Galaxy Clustering from the CFHT Supernova Legacy Survey

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• The 6x2pt method: supernova velocities meet multiple tracers
• An Efficient Approach to Obtaining Large Numbers of Distant Supernova Host Galaxy Redshifts
• The large-scale environment of thermonuclear and core-collapse supernovae
• The Properties of Type Ia Supernova Host Galaxies from the Sloan Digital Sky Survey