Evidence for Type Ia Supernova Diversity From Ultraviolet Observations with the Hubble Space Telescope
Author
Wang, Xiaofeng
Wang, Lifan
Filippenko, Alexei V.
Baron, Eddie
Kromer, Markus
Jack, Dennis
Zhang, Tianmeng
Aldering, Greg
Antilogus, Pierre
Arnett, W. David
Baade, Dietrich
Barris, Brian J.
Benetti, Stefano
Bouchet, Patrice
Burrows, Adam S.
Canal, Ramon
Cappellaro, Enrico
Carlberg, Raymond G.
di Carlo, Elisa
Challis, Peter J.
Crotts, Arlin P. S.
Danziger, John I.
Valle, Massimo Della
Fink, Michael
Foley, Ryan J.
Fransson, Claes
Gal-Yam, Avishay
Garnavich, Peter M.
Gerardy, Chris L.
Goldhaber, Gerson
Hamuy, Mario
Hillebrandt, Wolfgang
Höflich, Peter
Holland, Stephen T.
Holz, Daniel E.
Hughes, John P.
Jeffery, David J.
Jha, Saurabh W.
Kasen, Dan
Khokhlov, Alexei M.
Kirshner, Robert P.
Knop, Robert A.
Kozma, Cecilia
Krisciunas, Kevin
Lee, Brian C.
Leibundgut, Bruno
Lentz, Eric J.
Leonard, Douglas C.
Lewin, Walter H. G.
Li, Weidong
Livio, Mario
Lundqvist, Peter
Maoz, Dan
Matheson, Thomas
Mazzali, Paolo A.
Meikle, Peter
Miknaitis, Gajus
Milne, Peter A.
Mochnacki, Stefan W.
Nomoto, Ken'ichi
Nugent, Peter E.
Oran, Elaine S.
Panagia, Nino
Perlmutter, Saul
Phillips, Mark M.
Pinto, Philip
Poznanski, Dovi
Pritchet, Christopher J.
Reinecke, Martin
Riess, Adam G.
Ruiz-Lapuente, Pilar
Scalzo, Richard A.
Schlegel, Eric M.
Schmidt, Brian P.
Siegrist, James
Soderberg, Alicia M.
Sollerman, Jesper
Sonneborn, George
Spadafora, Anthony
Spyromilio, Jason
Sramek, Richard A.
Starrfield, Sumner G.
Strolger, Louis G.
Suntzeff, Nicholas B.
Thomas, Rollin C.
Tonry, John L.
Tornambe, Amedeo
Truran, James W.
Turatto, Massimo
Turner, Michael
Van Dyk, Schuyler D.
Weiler, Kurt W.
Wheeler, J. Craig
Wood-Vasey, Michael
Woosley, Stanford E.
Yamaoka, Hitoshi
Published Version
https://doi.org/10.1088/0004-637X/749/2/126Metadata
Show full item recordCitation
Wang, Xiaofeng, Lifan Wang, Alexei V. Filippenko, Eddie Baron, Markus Kromer, Dennis Jack, Tianmeng Zhang, et al. 2012. “EVIDENCE FOR TYPE Ia SUPERNOVA DIVERSITY FROM ULTRAVIOLET OBSERVATIONS WITH THE HUBBLE SPACE TELESCOPE.” The Astrophysical Journal 749 (2): 126. https://doi.org/10.1088/0004-637x/749/2/126.Abstract
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.Terms of Use
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