2001A&A...368..391R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET10:04:30

2001A&A...368..391R - Astronomy and Astrophysics, volume 368, 391-397 (2001/3-3)

The brightness of SN 1991T and the uniformity of decline-rate and colour corrected absolute magnitudes of supernovae Ia.

RICHTLER T., JENSEN J.B., TONRY J., BARRIS B. and DRENKHAHN G.

Abstract (from CDS):

We present a distance to NGC 4527, the host galaxy of the type Ia SN 1991T, measured by surface brightness fluctuations. This supernova has been labelled ``peculiar'' both on the grounds of its spectroscopic behaviour and its apparent overluminosity with respect to other supernovae. The distance modulus to NGC 4527 and thus to SN 1991T is 30.26±0.09. This relatively short distance largely removes the discrepancy with other Ia supernovae having similar light-curve characteristics and also removes the motivation for interpreting SN 1991T as a super-Chandrasekhar explosion. However, the reddening uncertainty results in significant uncertainty of the absolute magnitudes. We show further that, although the intrinsic absolute magnitudes among Ia supernovae are quite different, their brightness, corrected for decline-rate and colour, shows a high degree of uniformity, including underluminous events like SN1991bg and SN1997cn. In particular, the present data do not support a significant difference between corrected SNe Ia luminosities in late-type and early-type host galaxies.

Abstract Copyright:

Journal keyword(s): supernovae: general - supernovae: individual: SN 1991T - galaxies: individual: NGC 4527 - distance scale

Simbad objects: 27

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Number of rows : 27

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1216 1
2 SN 1980N SN* 03 22 59 -37 12.8   12.5 12.37     SNIa 140 1
3 SN 1992A SN* 03 36 27.41 -34 57 31.4   12.56 12.50     SNIa 383 1
4 NGC 1380 GiP 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 381 1
5 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 747 1
6 SN 1998bu SN* 10 46 46.01 +11 50 07.5   12.11       SNIa 296 1
7 SN 1989B SN* 11 20 13.93 +13 00 18.9   12.25       SNIa 342 1
8 M 66 GiP 11 20 15.026 +12 59 28.64 9.85 9.65 8.92     ~ 1176 4
9 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 528 1
10 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1645 2
11 NGC 4414 GiG 12 26 27.089 +31 13 24.76 11.12 10.96 10.12     ~ 516 2
12 SN 1974G SN* 12 26 28 +31 12.4   12.48       SNIa 94 1
13 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5909 0
14 NGC 4505 GiP 12 31 39.2222350443 +03 56 21.641915355   11.71       ~ 314 0
15 SN 1960F SN* 12 31 42.05 +03 56 47.7   11.34 11.43     SNIa 111 1
16 SN 1994D SN* 12 34 02.395 +07 42 05.70   11.75 12.03     SNIa 520 1
17 NGC 4526 GiG 12 34 03.029 +07 41 56.90   10.6       ~ 602 1
18 NGC 4527 GiP 12 34 08.496 +02 39 13.72   12.4       ~ 491 2
19 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 702 1
20 NGC 4536 GiP 12 34 27.129 +02 11 16.37 11.14 11.16 10.55 17.393   ~ 757 3
21 SN 1981B SN* 12 34 29.57 +02 11 59.3   11.74       SNIa 386 1
22 IC 4182 BiC 13 05 48.7470958923 +37 36 13.015792630   11.86   11.40   ~ 322 1
23 SN 1937C SN* 13 05 53.2 +37 36 07   8.80 8.77     SNIa 199 1
24 SN 1972E SN* 13 39 52.7 -31 40 09   8.49 8.30     SNIa 298 1
25 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33   ~ 1274 4
26 NGC 5490 rG 14 09 57.330 +17 32 43.53   13.4 15.5     ~ 148 1
27 SN 1997cn SN* 14 09 57.76 +17 32 32.3   17.2 16.7     SNIapec 73 1

    Equat.    Gal    SGal    Ecl

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2020.10.25-10:04:30

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