Host Galaxy Properties and Hubble Residuals of Type Ia Supernovae from the Nearby Supernova Factory
M. J. Childress,Greg Aldering,P. Antilogus,Cecilia Aragon,Stephen Bailey,C. Baltay,S. Bongard,C. Buton,A. Canto,F. Cellier-Holzem,N. Chotard,Y. Copin,H. K. Fakhouri,H. K. Fakhouri,E. Gangler,Julien Guy,Eric Hsiao,M. Kerschhaggl,A. G. Kim,M. Kowalski,S. C. Loken,Peter Nugent,K. Paech,Reynald Pain,E. Pecontal,R. Pereira,Saul Perlmutter,Saul Perlmutter,David Rabinowitz,M. Rigault,K. Runge,Richard Scalzo,G. Smadja,Charling Tao,Charling Tao,R. C. Thomas,Benjamin A. Weaver,Chen Wu,Chen Wu +38 more
TLDR
This paper examined the relationship between Type Ia supernova (SN Ia) Hubble residuals and the properties of their host galaxies using a sample of 115 SNe Ia from the Nearby Supernova Factory.Abstract:
We examine the relationship between Type Ia supernova (SN Ia) Hubble residuals and the properties of their host galaxies using a sample of 115 SNe Ia from the Nearby Supernova Factory. We use host galaxy stellar masses and specific star formation rates fitted from photometry for all hosts, as well as gas-phase metallicities for a subset of 69 star-forming (non-active galactic nucleus) hosts, to show that the SN Ia Hubble residuals correlate with each of these host properties. With these data we find new evidence for a correlation between SN Ia intrinsic color and host metallicity. When we combine our data with those of other published SN Ia surveys, we find the difference between mean SN Ia brightnesses in low- and high-mass hosts is 0.077 ? 0.014?mag. When viewed in narrow (0.2?dex) bins of host stellar mass, the data reveal apparent plateaus of Hubble residuals at high and low host masses with a rapid transition over a short mass range (9.8 ? log (M */M ?) ? 10.4). Although metallicity has been a favored interpretation for the origin of the Hubble residual trend with host mass, we illustrate how dust in star-forming galaxies and mean SN Ia progenitor age both evolve along the galaxy mass sequence, thereby presenting equally viable explanations for some or all of the observed SN Ia host bias.read more
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Journal ArticleDOI
Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
Marc Betoule,Richard Kessler,Julien Guy,Julien Guy,J. Mosher,D. Hardin,Rahul Biswas,Pierre Astier,P. El-Hage,M. Konig,Steve Kuhlmann,John Marriner,Reynald Pain,Nicolas Regnault,Christophe Balland,Bruce A. Bassett,Bruce A. Bassett,Peter J. Brown,Heather Campbell,Heather Campbell,Raymond G. Carlberg,F. Cellier-Holzem,D. Cinabro,A. Conley,C. B. D'Andrea,Darren L. DePoy,M. Doi,Richard S. Ellis,Sebastien Fabbro,Alexei V. Filippenko,Ryan J. Foley,Joshua A. Frieman,Joshua A. Frieman,Dominique Fouchez,Lluís Galbany,Lluís Galbany,Ariel Goobar,Ravi R. Gupta,Ravi R. Gupta,Gary J. Hill,Renée Hlozek,Craig J. Hogan,Craig J. Hogan,Isobel Hook,Dale Andrew Howell,Dale Andrew Howell,Saurabh Jha,L. Le Guillou,Giorgos Leloudas,Giorgos Leloudas,C. Lidman,Jennifer L. Marshall,Anais Möller,A. Mourao,J. Neveu,Robert C. Nichol,Matthew D. Olmstead,Nathalie Palanque-Delabrouille,Saul Perlmutter,J. L. Prieto,Christopher J. Pritchet,Michael Richmond,Adam G. Riess,Adam G. Riess,V. Ruhlmann-Kleider,Masao Sako,K. Schahmaneche,D. P. Schneider,M. R. Smith,Jesper Sollerman,Mark Sullivan,Nicholas A. Walton,C. Wheeler +72 more
TL;DR: In this article, the authors presented cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations.
Journal ArticleDOI
The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch
Wendy L. Freedman,Barry F. Madore,Dylan Hatt,Taylor J. Hoyt,In Sung Jang,Rachael L. Beaton,Christopher R. Burns,Myung Gyoon Lee,Andrew J. Monson,Jillian R. Neeley,Mark M. Phillips,Jeffrey A. Rich,Mark Seibert +12 more
TL;DR: In this article, a new and independent determination of the local value of the Hubble constant based on a calibration of the Tip of the Red Giant Branch (TRGB) applied to Type Ia supernovae (SNeIa) is presented.
The Carnegie Supernova Project: Analysis of the First Sample of Low-Redshift Type-Ia Supernovae
Gastón Folatelli,Mark M. Phillips,Christopher R. Burns,Carlos Contreras,Mario Hamuy,Wendy L. Freedman,S. E. Persson,Maximilian Stritzinger,N. B. Suntzeff,Kevin Krisciunas,L. Boldt,S. Gonzalez,Wojtek Krzeminski,Nidia Morrell,M. Roth,Francisco Salgado,B. F. Madore,David Murphy,P. Wyatt,Wenxiong Li,Alexei V. Filippenko +20 more
TL;DR: In this paper, an analysis of the first set of low-redshift (z < 0.08) Type Ia supernovae (SNe Ia) monitored by the Carnegie Supernova Project between 2004 and 2006 is presented.
Journal ArticleDOI
Confirmation of a Star Formation Bias in Type Ia Supernova Distances and its Effect on the Measurement of the Hubble Constant
M. Rigault,Greg Aldering,Marek Kowalski,Y. Copin,P. Antilogus,Cecilia Aragon,Cecilia Aragon,Stephen Bailey,C. Baltay,D. Baugh,S. Bongard,Kyle Boone,Kyle Boone,C. Buton,J. Chen,N. Chotard,H. K. Fakhouri,U. Feindt,U. Feindt,Parker Fagrelius,Parker Fagrelius,M. Fleury,Dominique Fouchez,E. Gangler,Brian Hayden,A. G. Kim,P.-F. Leget,S. Lombardo,Jakob Nordin,Jakob Nordin,Reynald Pain,E. Pecontal,R. Pereira,Saul Perlmutter,Saul Perlmutter,David Rabinowitz,K. Runge,David Rubin,David Rubin,C. Saunders,G. Smadja,Caroline Sofiatti,Caroline Sofiatti,Nao Suzuki,Nao Suzuki,C. Tao,C. Tao,B. A. Weaver +47 more
Abstract: Previously we used the Nearby Supernova Factory sample to show that SNe~Ia having locally star-forming environments are dimmer than SNe~Ia having locally passive environments.Here we use the \constitution\ sample together with host galaxy data from \GALEX\ to independently confirm that result. The effect is seen using both the SALT2 and MLCS2k2 lightcurve fitting and standardization methods, with brightness differences of $0.094 \pm 0.037\ \mathrm{mag}$ for SALT2 and $0.155 \pm 0.041\ \mathrm{mag}$ for MLCS2k2 with $R_V=2.5$. When combined with our previous measurement the effect is $0.094 \pm 0.025\ \mathrm{mag}$ for SALT2. If the ratio of these local SN~Ia environments changes with redshift or sample selection, this can lead to a bias in cosmological measurements. We explore this issue further, using as an example the direct measurement of $H_0$. \GALEX{} observations show that the SNe~Ia having standardized absolute magnitudes calibrated via the Cepheid period--luminosity relation using {\textit{HST}} originate in predominately star-forming environments, whereas only ~50% of the Hubble-flow comparison sample have locally star-forming environments. As a consequence, the $H_0$ measurement using SNe~Ia is currently overestimated. Correcting for this bias, we find a value of $H_0^{corr}=70.6\pm 2.6\ \mathrm{km\ s^{-1}\ Mpc^{-1}}$ when using the LMC distance, Milky Way parallaxes and the NGC~4258 megamaser as the Cepheid zeropoint, and $68.8\pm 3.3\ \mathrm{km\ s^{-1}\ Mpc^{-1}}$ when only using NGC~4258. Our correction brings the direct measurement of $H_0$ within $\sim 1\,\sigma$ of recent indirect measurements based on the CMB power spectrum.
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Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
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Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
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TL;DR: In this paper, the authors present observations of 10 type Ia supernovae (SNe Ia) between 0.16 0 and 4.0 sigma confidence levels, for two fitting methods respectively.
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