2012ApJ...749..126W

Query : 2012ApJ...749..126W

2012ApJ...749..126W - Astrophys. J., 749, 126 (2012/April-3)

Evidence for type Ia supernova diversity from ultraviolet observations with the Hubble space telescope.

WANG X., WANG L., FILIPPENKO A.V., BARON E., KROMER M., JACK D., ZHANG T., ALDERING G., ANTILOGUS P., ARNETT W.D., BAADE D., BARRIS B.J., BENETTI S., BOUCHET P., BURROWS A.S., CANAL R., CAPPELLARO E., CARLBERG R.G., DI CARLO E., CHALLIS P.J., CROTTS A.P.S., DANZIGER J.I., DELLA VALLE M., FINK M., FOLEY R.J., FRANSSON C., GAL-YAM A., GARNAVICH P.M., GERARDY C.L., GOLDHABER G., HAMUY M., HILLEBRANDT W., HOFLICH P., HOLLAND S.T., HOLZ D.E., HUGHES J.P., JEFFERY D.J., JHA S.W., KASEN D., KHOKHLOV A.M., KIRSHNER R.P., KNOP R.A., KOZMA C., KRISCIUNAS K., LEE B.C., LEIBUNDGUT B., LENTZ E.J., LEONARD D.C., LEWIN W.H.G., LI W., LIVIO M., LUNDQVIST P., MAOZ D., MATHESON T., MAZZALI P.A., MEIKLE P., MIKNAITIS G., MILNE P.A., MOCHNACKI S.W., NOMOTO K., NUGENT P.E., ORAN E.S., PANAGIA N., PERLMUTTER S., PHILLIPS M.M., PINTO P., POZNANSKI D., PRITCHET C.J., REINECKE M., RIESS A.G., RUIZ-LAPUENTE P., SCALZO R.A., SCHLEGEL E.M., SCHMIDT B.P., SIEGRIST J., SODERBERG A.M., SOLLERMAN J., SONNEBORN G., SPADAFORA A., SPYROMILIO J., SRAMEK R.A., STARRFIELD S.G., STROLGER L.G., SUNTZEFF N.B., THOMAS R.C., TONRY J.L., TORNAMBE A., TRURAN J.W., TURATTO M., TURNER M., VAN DYK S.D., WEILER K.W., WHEELER J.C., WOOD-VASEY M., WOOSLEY S.E. and YAMAOKA H.

Abstract (from CDS):

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 Å. Significant diversity is seen in the near-maximum-light spectra (∼2000-3500 Å) 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 luminosities measured in the uvw1/F250W filter are found to correlate with the B-band light-curve shape parameter Δm₁₅(B), but with much larger scatter relative to the correlation in the broadband B band (e.g., ∼0.4 mag versus ∼0.2 mag for those with 0.8 mag < Δm₁₅(B) < 1.7 mag). SN 2004dt is found as an outlier of this correlation (at > 3σ), being brighter than normal SNe Ia such as SN 2005cf by ∼0.9 mag and ∼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.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - distance scale - dust, extinction - supernovae: general - ultraviolet: general

Simbad objects: 24

Full paper

View the references in ADS

Number of rows : 24

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag I	Sp type	#ref 1850 - 2023	#notes
1	SN 2001eh	SN*	01 38 12.10	+41 39 18.8		16.5		SNIa	51	1
2	SN 2004dt	SN*	02 02 12.3	-00 06 02				SNIa	139	1
3	NGC 799	LIN	02 02 12.3388058520	-00 06 02.270888460	14.2			~	63	0
4	SN 2005ke	SN*	03 35 04.35	-24 56 38.8		17.2		SNIap	141	1
5	SN 1992A	SN*	03 36 27.41	-34 57 31.4	12.56	12.50		SNIa	398	1
6	SN 2001el	SN*	03 44 30.60	-44 38 23.4	12.81			SNIa	257	1
7	SN 2001ep	SN*	04 57 00.26	-04 45 40.2		17.1		SNIa	68	1
8	NGC 2930	EmG	09 37 32.7585308016	+23 12 12.028906044	14.7			~	35	0
9	SN 2005M	SN*	09 37 32.76	+23 12 10.0		18.8		SNIa	76	1
10	SN 1989B	SN*	11 20 13.93	+13 00 18.9	12.25			SNIa	358	1
11	SN 2006X	SN*	12 22 53.93	+15 48 32.0		15.3		SNIa	315	1
12	SN 1991bg	SN*	12 25 03.70	+12 52 15.6	14.75	14.3		SNIapec	576	1
13	SN 1991T	SN*	12 34 10.20	+02 39 56.4	11.70	11.51		SNIapec	757	1
14	SN 1981B	SN*	12 34 29.57	+02 11 59.3	11.74			SNIa	397	1
15	SN 1990N	SN*	12 42 56.68	+13 15 23.4	12.69	12.62		SNIa	385	1
16	SN 2002cx	SN*	13 13 49.72	+06 57 31.9	17.68			SNIapec	220	1
17	SN 2011fe	SN*	14 03 05.711	+54 16 25.22	10.12	10.06		SNIa-norm	638	1
18	SN 2003fk	SN*	14 19 55.800	+53 05 50.64			18.90	SNIa	17	1
19	SN 2007af	SN*	14 22 21.03	-00 23 37.6		15.4		SNIa	157	1
20	SN 2005cf	SN*	15 21 33.12	-07 26 57.1	13.54			SNIa	270	1
21	MCG-01-39-003	GiP	15 21 33.377	-07 26 51.65	15			~	62	0
22	SN 2009dc	SN*	15 51 12.12	+25 42 28.0				SNIa-norm	160	1
23	SN 2004ef	SN*	22 42 10.020	+19 59 39.88				SNIa	87	1
24	UGC 12158	GiG	22 42 10.5285785904	+19 59 48.887242548	15.3			~	51	0

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