Early ultraviolet, optical, and X-ray observations of the type IIPSN 2005cs in M51 with Swift

被引:49
作者
Brown, Peter J. [1 ]
Dessart, Luc
Holland, Stephen T.
Immler, Stefan
Landsman, Wayne
Blondin, Stephane
Blustin, Alexander J.
Breeveld, Alice
Dewangan, Gulab C.
Gehrels, Neil
Hutchins, Robert B.
Kirshner, Robert P.
Mason, Keith O.
Mazzali, Paolo A.
Milne, Peter
Modjaz, Maryam
Roming, Peter W. A.
机构
[1] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[2] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA
[3] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
[4] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Xray Astrophys Branch, Greenbelt, MD 20771 USA
[5] Univ Space Res Assoc, Columbia, MD 21044 USA
[6] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[7] UCL, Mullard Space Sci Lab, Dept Space & Climate Phys, Dorking RH5 6NT, Surrey, England
[8] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
[9] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Astroparticle Phys Lab, Greenbelt, MD 20771 USA
[10] Osserv Astron Trieste, INAF, I-34131 Trieste, Italy
[11] Max Planck Inst Astrophys, D-85741 Garching, Germany
关键词
galaxies : individual (M51); ultraviolet : general; X-rays : general;
D O I
10.1086/511968
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report early photospheric-phase observations of the Type IIP supernova ( SN) 2005cs obtained by the Swift ultraviolet-optical and X-ray telescopes. Observations started within 2 days of discovery and continued on a regular basis for 3 weeks. During this time the V-band magnitude remained essentially constant, while the UV was initially bright, but steadily faded until below the brightness of an underlying UV-bright H II region. This UV decay is similar to SNe II observed by the International Ultraviolet Explorer. UV grism spectra show the P Cygni absorption of Mg II 2798 8, indicating a photospheric origin of the UV flux. Based on non-LTE model atmosphere calculations with the CMFGEN code, we associate the rapid evolution of the UV flux with the cooling of the ejecta, the peak of the spectral energy distribution ( SED) shifting from similar to 700 angstrom on June 30 to similar to 1200 angstrom on July 5. Furthermore, the corresponding recombination of the ejecta, e. g., the transition from Fe III to Fe II, induces a considerable strengthening of metal line-blanketing at and above the photosphere, blocking more and more effectively this fading UV flux. SN 2005cs was not detected in the X-ray band, and the upper limit to the X-ray luminosity yields a limit to the mass-loss rate of the progenitor of M less than or similar to 1 x 10(-5) yr(-1) (v(w)/10 km s(-1)). Overall, Swift represents a unique opportunity to capture the early and fast evolution of Type II SNe in the UV, providing additional constraints on the reddening, the SED shortward of 4000 angstrom, and the ionization state and temperature of the photon-decoupling regions.
引用
收藏
页码:1488 / 1495
页数:8
相关论文
共 57 条
[1]  
BARBON R, 1982, ASTRON ASTROPHYS, V116, P35
[2]  
BARBON R, 1979, A A, V72, P2875
[3]   Preliminary spectral analysis of the Type II supernova 1999em [J].
Baron, E ;
Branch, D ;
Hauschildt, PH ;
Filippenko, AV ;
Kirshner, RP ;
Challis, PM ;
Jha, S ;
Chevalier, R ;
Fransson, C ;
Lundqvist, P ;
Garnavich, P ;
Leibundgut, B ;
McCray, R ;
Michael, E ;
Panagia, N ;
Phillips, MM ;
Pun, CSJ ;
Schmidt, B ;
Sonneborn, G ;
Suntzeff, NB ;
Wang, L ;
Wheeler, JC .
ASTROPHYSICAL JOURNAL, 2000, 545 (01) :444-448
[4]   Preliminary spectral analysis of SN 1994I [J].
Baron, E ;
Hauschildt, PH ;
Branch, D ;
Kirshner, RP ;
Filippenko, AV .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 279 (03) :799-803
[5]   NON-LTE SPECTRAL-ANALYSIS AND MODEL CONSTRAINTS ON SN-1993J [J].
BARON, E ;
HAUSCHILDT, PH ;
BRANCH, D ;
AUSTIN, S ;
GARNAVICH, P ;
ANN, HB ;
WAGNER, RM ;
FILIPPENKO, AV ;
MATHESON, T ;
LIEBERT, J .
ASTROPHYSICAL JOURNAL, 1995, 441 (01) :170-181
[6]  
BARON E, 2007, IN PRESS MULTICOLOUR
[7]   Recent star formation in nearby galaxies from Galaxy Evolution Explorer imaging:: M101 and M51 [J].
Bianchi, L ;
Thilker, DA ;
Burgarella, D ;
Friedman, PG ;
Hoopes, CG ;
Boissier, S ;
de Paz, AG ;
Barlow, TA ;
Byun, YI ;
Donas, J ;
Forster, K ;
Heckman, TM ;
Jelinsky, PN ;
Lee, YW ;
Madore, BF ;
Malina, RF ;
Martin, DC ;
Milliard, B ;
Morrissey, P ;
Neff, SG ;
Rich, RM ;
Schiminovich, D ;
Siegmund, OHW ;
Small, T ;
Szalay, AS ;
Welsh, BY ;
Wyder, TK .
ASTROPHYSICAL JOURNAL, 2005, 619 (01) :L71-L74
[8]  
BRANCH D, 1987, APJ, V20, pL121
[9]  
BROWN PJ, 2006, ATEL, P761
[10]   The Swift X-ray telescope [J].
Burrows, DN ;
Hill, JE ;
Nousek, JA ;
Kennea, JA ;
Wells, A ;
Osborne, JP ;
Abbey, AF ;
Beardmore, A ;
Mukerjee, K ;
Short, ADT ;
Chincarini, G ;
Campana, S ;
Citterio, O ;
Moretti, A ;
Pagani, C ;
Tagliaferri, G ;
Giommi, P ;
Capalbi, M ;
Tamburelli, F ;
Angelini, L ;
Cusumano, G ;
Bräuninger, HW ;
Burkert, W ;
Hartner, GD .
SPACE SCIENCE REVIEWS, 2005, 120 (3-4) :165-195