A Caltech Library Service

A Strong Ultraviolet Pulse From a Newborn Type Ia Supernova

Cao, Yi and Kulkarni, S. R. and Howell, D. Andrew and Gal-Yam, Avishay and Kasliwal, Mansi Manoj and Valenti, Stefano and Johansson, J. and Amanullah, R. and Goobar, A. and Sollerman, J. and Taddia, F. and Horesh, Assaf and Sagiv, Ilan and Cenko, S. Bradley and Nugent, Peter E. and Arcavi, Iair and Surace, Jason and Woźniak, P. R. and Moody, Daniela I. and Rebbapragada, Umaa D. and Bue, Brian D. and Gehrels, Neil (2015) A Strong Ultraviolet Pulse From a Newborn Type Ia Supernova. Nature, 521 (7552). pp. 328-331. ISSN 0028-0836.

[img] Image (JPEG) (Extended Data Figure 1: Comparative analysis of iPTF14atg lightcurve) - Supplemental Material
See Usage Policy.

[img] Image (JPEG) (Extended Data Figure 2: Comparative analysis of iPTF14atg colour evolution) - Supplemental Material
See Usage Policy.

[img] Image (JPEG) (Extended Data Figure 3: The spectral evolution of iPTF14atg) - Supplemental Material
See Usage Policy.

[img] Image (JPEG) (Extended Data Figure 4: Comparative analysis of iPTF14atg spectra) - Supplemental Material
See Usage Policy.

[img] Image (JPEG) (Extended Data Table 1: Spectroscopic observation log) - Supplemental Material
See Usage Policy.

[img] Image (JPEG) (Extended Data Table 2: Swift Observation of iPTF14atg) - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


Type Ia supernovae are destructive explosions of carbon-oxygen white dwarfs. Although they are used empirically to measure cosmological distances, the nature of their progenitors remains mysterious. One of the leading progenitor models, called the single degenerate channel, hypothesizes that a white dwarf accretes matter from a companion star and the resulting increase in its central pressure and temperature ignites thermonuclear explosion. Here we report observations with the Swift Space Telescope of strong but declining ultraviolet emission from a type Ia supernova within four days of its explosion. This emission is consistent with theoretical expectations of collision between material ejected by the supernova and a companion star, and therefore provides evidence that some type Ia supernovae arise from the single degenerate channel.

Item Type:Article
Related URLs:
URLURL TypeDescription ReadCube access -- Article ReadCube access -- Erratum
Cao, Yi0000-0002-8036-8491
Kulkarni, S. R.0000-0001-5390-8563
Howell, D. Andrew0000-0003-4253-656X
Gal-Yam, Avishay0000-0002-3653-5598
Kasliwal, Mansi Manoj0000-0002-5619-4938
Valenti, Stefano0000-0001-8818-0795
Johansson, J.0000-0001-5975-290X
Amanullah, R.0000-0002-5559-9351
Goobar, A.0000-0002-4163-4996
Sollerman, J.0000-0003-1546-6615
Taddia, F.0000-0002-2387-6801
Horesh, Assaf0000-0002-5936-1156
Cenko, S. Bradley0000-0003-1673-970X
Nugent, Peter E.0000-0002-3389-0586
Arcavi, Iair0000-0001-7090-4898
Surace, Jason0000-0001-7291-0087
Woźniak, P. R.0000-0002-9919-3310
Rebbapragada, Umaa D.0000-0002-2560-3495
Bue, Brian D.0000-0002-7856-3570
Additional Information:© 2015 Macmillan Publishers Limited. Received 14 November 2014; accepted 16 March 2015. We thank A. L. Piro, M. Kromer and J. Cohen for discussions. We also thank A. Waszczak, A. Rubin, O. Yaron, A. De Cia, D. A. Perley, G. E. Duggan, O. Smirnova, S. Papadogiannakis, A. Nyholm, Y. F. Martinez and the staff at the Nordic Optical Telescope and Gemini for observation and data reduction. Some of the data presented here were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California and NASA. The observatory was made possible by the generous financial support of the W. M. Keck Foundation. Some data were obtained with the Nordic Optical Telescope, which is operated by the Nordic Optical Telescope Scientific Association at the Observatorio del Roque de los Muchachos, La Palma, Spain. This work also makes use of observations from the Las Cumbres Observatory Global Telescope (LCOGT) network. Research at California Institute of Technology is supported by the National Science Foundation. D.A.H. acknowledges support from the National Science Foundation. A.G.-Y. acknowledges support from the EU/FP7 via an ERC grant, the “Quantum Universe” I-Core programme, the ISF, Minerva and Weizmann-UK grants, and the Kimmel Award. M.M.K. acknowledges generous support from the Carnegie-Princeton fellowship. Supernova research at the Oskar Klein Centre is supported by the Swedish Research Council and by the Knut and Alice Wallenberg Foundation. The National Energy Research Scientific Computing Center, which is supported by the Office of Science of the US Department of Energy under contract number DE-AC02-05CH11231, provided staff, computational resources, and data storage for this project. The participation of the Los Alamos National Laboratory (LANL) in iPTF is supported by the US Department of Energy as part of the Laboratory Directed Research and Development programme. A portion of this work was carried out at the Jet Propulsion Laboratory under a Research and Technology Development Grant, under contract with the National Aeronautics and Space Administration.
Group:Palomar Transient Factory, Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
W. M. Keck FoundationUNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Israel Science FoundationUNSPECIFIED
Carnegie-Princeton FellowshipUNSPECIFIED
Swedish Research CouncilUNSPECIFIED
Knut and Alice Wallenberg FoundationUNSPECIFIED
Department of Energy (DOE)DE-AC02-05CH11231
Issue or Number:7552
Record Number:CaltechAUTHORS:20150227-145859366
Persistent URL:
Official Citation:A strong ultraviolet pulse from a newborn type Ia supernova Yi Cao, S. R. Kulkarni, D. Andrew Howell, Avishay Gal-Yam, Mansi M. Kasliwal, Stefano Valenti, J. Johansson, R. Amanullah, A. Goobar, J. Sollerman, F. Taddia, Assaf Horesh, Ilan Sagiv, S. Bradley Cenko, Peter E. Nugent, Iair Arcavi, Jason Surace, P. R. Woźniak, Daniela I. Moody, Umaa D. Rebbapragada, Brian D. Bue & Neil Gehrels Nature 521, 328–331 (21 May 2015) doi:10.1038/nature14440
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55347
Deposited By: Katherine Johnson
Deposited On:21 May 2015 18:32
Last Modified:06 May 2020 16:22

Repository Staff Only: item control page