Measurements of Ω and Λ from 42 High-Redshift Supernovae
- S. Perlmutter, G. Aldering, The Supernova Cosmology Project
- Physics
- 1 December 1998
We report measurements of the mass density, ΩM, and cosmological-constant energy density, ΩΛ, of the universe based on the analysis of 42 type Ia supernovae discovered by the Supernova Cosmology…
Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets
- M. Kowalski, D. Rubin, J. Yun
- Physics
- 25 April 2008
We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This…
The Palomar Transient Factory: System Overview, Performance, and First Results
- N. Law, S. Kulkarni, J. Zolkower
- Physics
- 30 June 2009
The Palomar Transient Factory (PTF) is a fully-automated, wide-field survey aimed at a systematic exploration of the optical transient sky. The transient survey is performed using a new 8.1 square…
Hydrogen-poor superluminous stellar explosions
- R. Quimby, S. Kulkarni, D. Levitan
- PhysicsNature
- 1 October 2009
Observations of a class of luminous supernovae whose properties cannot be explained by any of the following processes: radioactive decay of freshly synthesized elements, explosion shock in the envelope of a supergiant star, and interaction between the debris and slowly moving, hydrogen-rich circumstellar material.
An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy
Multiwavelength observations of a unique γ-ray–selected transient detected by the Swift satellite, accompanied by bright emission across the electromagnetic spectrum, and whose properties are unlike any previously observed source are presented.
Supernova SN 2011fe from an exploding carbon–oxygen white dwarf star
- P. Nugent, M. Sullivan, D. Poznanski
- PhysicsNature
- 27 October 2011
Early observations of type Ia supernova SN 2011fe in the galaxy M101 at a distance from Earth of 6.4 megaparsecs find that the exploding star was probably a carbon–oxygen white dwarf, and from the lack of an early shock it is concluded that the companion was likely a main-sequence star.
Illuminating gravitational waves: A concordant picture of photons from a neutron star merger
- M. Kasliwal, E. Nakar, W. Zhao
- PhysicsScience
- 16 October 2017
It is demonstrated that merging neutron stars are a long-sought production site forging heavy elements by r-process nucleosynthesis, which is dissimilar to classical short gamma-ray bursts with ultrarelativistic jets.
New Constraints on ΩM, ΩΛ, and w from an Independent Set of 11 High-Redshift Supernovae Observed with the Hubble Space Telescope
- R. Knop, G. Aldering, N. Yasuda
- Physics
- 20 November 2003
We report measurements of ΩM, ΩΛ, and w from 11 supernovae (SNe) at z = 0.36-0.86 with high-quality light curves measured using WFPC2 on the Hubble Space Telescope (HST). This is an independent set…
SN 2006gy: Discovery of the Most Luminous Supernova Ever Recorded, Powered by the Death of an Extremely Massive Star like η Carinae
- N. Smith, Weidong Li, Charles E. Hansen
- Physics
- 21 December 2006
We report the discovery and early observations of the peculiar Type IIn supernova (SN) 2006gy in NGC 1260. With a peak visual magnitude of about -22, it is the most luminous supernova ever recorded.…
A CONTINUUM OF H- TO He-RICH TIDAL DISRUPTION CANDIDATES WITH A PREFERENCE FOR E+A GALAXIES
- I. Arcavi, A. Gal-yam, R. Laher
- Physics
- 6 May 2014
We present the results of a Palomar Transient Factory (PTF) archival search for blue transients that lie in the magnitude range between “normal” core-collapse and superluminous supernovae (i.e., with…
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