The Velocity Field from Type Ia Supernovae Matches the Gravity Field from Galaxy Surveys
Author
Riess, Adam G.
Davis, Marc
Baker, Jonathan
Kirshner, Robert P.
Published Version
https://doi.org/10.1086/310917Metadata
Show full item recordCitation
Riess, Adam G., Marc Davis, Jonathan Baker, and Robert P. Kirshner. 1997. “The Velocity Field from Type Ia Supernovae Matches the Gravity Field from Galaxy Surveys.” The Astrophysical Journal 488 (1): L1–5. https://doi.org/10.1086/310917.Abstract
We compare the peculiar velocities of nearby Type la supernovae (SNs) with those predicted by the gravity fields of full-sky galaxy catalogs. The method provides a powerful test of the gravitational instability paradigm and strong constraints on the density parameter beta = Omega(0.6)/b. For 24 Type Ia SNs within 10,000 km s(-1), we find that the observed Type Ia SN peculiar velocities are well modeled by the predictions derived from the 1.2 Jy IRAS survey and the Optical Redshift Survey (ORS). Our best beta value is 0.4 from IRAS, and 0.3 from the ORS, with beta>0.7 and beta<0.15 ruled out at 95% confidence levels from the IRAS comparison. Bootstrap resampling tests show these results to be robust in the mean and in its error. The precision of this technique will improve as additional nearby Type Ia SNs are discovered and monitored.Terms of Use
This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAACitable link to this page
http://nrs.harvard.edu/urn-3:HUL.InstRepos:41399823
Collections
- FAS Scholarly Articles [18172]
Contact administrator regarding this item (to report mistakes or request changes)