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Evidence for type ia supernova diversity from ultraviolet observations with the hubble space telescope
- Wang, Xiaofeng (author)
- Wang, Lifan (author)
- Filippenko, Alexei V. (author)
- show more...
- Baron, Eddie (author)
- Kromer, Markus (author)
- Jack, Dennis (author)
- Zhang, Tianmeng (author)
- Aldering, Greg (author)
- Antilogus, Pierre (author)
- Arnett, W. David (author)
- Baade, Dietrich (author)
- Barris, Brian J. (author)
- Benetti, Stefano (author)
- Bouchet, Patrice (author)
- Burrows, Adam S. (author)
- Canal, Ramon (author)
- Cappellaro, Enrico (author)
- Carlberg, Raymond G. (author)
- di Carlo, Elisa (author)
- Challis, Peter J. (author)
- Crotts, Arlin P. S. (author)
- Danziger, John I. (author)
- Della Valle, Massimo (author)
- Fink, Michael (author)
- Foley, Ryan J. (author)
- Gal-Yam, Avishay (author)
- Garnavich, Peter M. (author)
- Gerardy, Chris L. (author)
- Goldhaber, Gerson (author)
- Hamuy, Mario (author)
- Hillebrandt, Wolfgang (author)
- Hoeflich, Peter (author)
- Holland, Stephen T. (author)
- Holz, Daniel E. (author)
- Hughes, John P. (author)
- Jeffery, David J. (author)
- Jha, Saurabh W. (author)
- Kasen, Dan (author)
- Khokhlov, Alexei M. (author)
- Kirshner, Robert P. (author)
- Knop, Robert A. (author)
- Krisciunas, Kevin (author)
- Lee, Brian C. (author)
- Leibundgut, Bruno (author)
- Lentz, Eric J. (author)
- Leonard, Douglas C. (author)
- Lewin, Walter H. G. (author)
- Li, Weidong (author)
- Livio, Mario (author)
- Maoz, Dan (author)
- Matheson, Thomas (author)
- Mazzali, Paolo A. (author)
- Meikle, Peter (author)
- Miknaitis, Gajus (author)
- Milne, Peter A. (author)
- Mochnacki, Stefan W. (author)
- Nomoto, Ken'ichi (author)
- Nugent, Peter E. (author)
- Oran, Elaine S. (author)
- Panagia, Nino (author)
- Perlmutter, Saul (author)
- Phillips, Mark M. (author)
- Pinto, Philip (author)
- Poznanski, Dovi (author)
- Pritchet, Christopher J. (author)
- Reinecke, Martin (author)
- Riess, Adam G. (author)
- Ruiz-Lapuente, Pilar (author)
- Scalzo, Richard A. (author)
- Schlegel, Eric M. (author)
- Schmidt, Brian P. (author)
- Siegrist, James (author)
- Soderberg, Alicia M. (author)
- Sonneborn, George (author)
- Spadafora, Anthony (author)
- Spyromilio, Jason (author)
- Sramek, Richard A. (author)
- Starrfield, Sumner G. (author)
- Strolger, Louis G. (author)
- Suntzeff, Nicholas B. (author)
- Thomas, Rollin C. (author)
- Tonry, John L. (author)
- Tornambe, Amedeo (author)
- Truran, James W. (author)
- Turatto, Massimo (author)
- Turner, Michael (author)
- Van Dyk, Schuyler D. (author)
- Weiler, Kurt W. (author)
- Wheeler, J. Craig (author)
- Wood-Vasey, Michael (author)
- Woosley, Stanford E. (author)
- Yamaoka, Hitoshi (author)
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- (creator_code:org_t)
- 2012
- 2012
- English.
- In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 749:2, s. 126-
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- We present ultraviolet (UV) spectroscopy and photometry of four Type Ia supernovae (SNe 2004dt, 2004ef, 2005M, and 2005cf) obtained with the UV prism of the Advanced Camera for Surveys on the Hubble Space Telescope. This data set provides unique spectral time series down to 2000 angstrom. Significant diversity is seen in the near-maximum-light spectra (similar to 2000-3500 angstrom) for this small sample. The corresponding photometric data, together with archival data from Swift Ultraviolet/Optical Telescope observations, provide further evidence of increased dispersion in the UV emission with respect to the optical. The peak luminositiesmeasured in the uvw1/F250W filter are found to correlate with the B-band light-curve shape parameter Delta m(15)(B), but with much larger scatter relative to the correlation in the broadband B band (e.g., similar to 0.4 mag versus similar to 0.2 mag for those with 0.8 mag < Delta m(15)(B) < 1.7 mag). SN 2004dt is found as an outlier of this correlation (at > 3 sigma), being brighter than normal SNe Ia such as SN 2005cf by similar to 0.9 mag and similar to 2.0 mag in the uvw1/F250W and uvm2/F220W filters, respectively. We show that different progenitor metallicity or line-expansion velocities alone cannot explain such a large discrepancy. Viewing-angle effects, such as due to an asymmetric explosion, may have a significant influence on the flux emitted in the UV region. Detailed modeling is needed to disentangle and quantify the above effects.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- cosmology: observations
- distance scale
- dust
- extinction
- supernovae: general
- ultraviolet: general
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
- Wang, Xiaofeng
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- Stockholm University
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