2022ApJ...938...47P

Query : 2022ApJ...938...47P

2022ApJ...938...47P - Astrophys. J., 938, 47 (2022/October-2)

The Absolute Magnitudes of 1991T-like Supernovae.

PHILLIPS M.M., ASHALL C., BURNS C.R., CONTRERAS C., GALBANY L., HOEFLICH P., HSIAO E.Y., MORRELL N., NUGENT P., UDDIN S.A., BARON E., FREEDMAN W.L., HARRIS C.E., KRISCIUNAS K., KUMAR S., LU J., PERSSON S.E., PIRO A.L., POLIN A., SHAHBANDEH M., STRITZINGER M. and SUNTZEFF N.B.

Abstract (from CDS):

1991T-like supernovae are the luminous, slow-declining extreme of the Branch shallow-silicon (SS) subclass of Type Ia supernovae. They are distinguished by extremely weak Ca II H & K and Si IIλ6355 and strong Fe III absorption features in their optical spectra at pre-maximum phases, and have long been suspected to be over-luminous compared to normal Type Ia supernovae. In this paper, the pseudo-equivalent width of the Si IIλ6355 absorption obtained at light curve phases from ≤ +10 days is combined with the morphology of the i-band light curve to identify a sample of 1991T-like supernovae in the Carnegie Supernova Project II. Hubble diagram residuals show that, at optical as well as near-infrared wavelengths, these events are over-luminous by ∼0.1-0.5 mag with respect to the less extreme Branch SS (1999aa-like) and Branch core-normal supernovae with similar B-band light-curve decline rates.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Supernovae - Type Ia supernovae - Observational cosmology

Simbad objects: 28

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Number of rows : 28
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 2005hk SN* 00 27 50.89 -01 11 53.3   15.92       SNIax 240 1
2 OGLE 2014-SN-107 ev 00 42 28.76 -64 45 51.0           ~ 8 0
3 APMUKS (BJ) B004021.02-650219.5 G 00 42 29.113 -64 45 53.22           ~ 3 0
4 SN 2007if SN* 01 10 51.37 +15 27 39.9   23.3 19.5     SNIap 142 1
5 SN 1998es SN* 01 37 17.60 +05 52 50.6   13.99       SNIapec 128 1
6 ESO 154-10 AG? 02 45 08.716 -55 44 26.15   13.39   11.79   ~ 46 0
7 SN 2013fc SN* 02 45 08.95 -55 44 27.3           SNIIn 20 0
8 SN 2014eg SN* 02 45 09.27 -55 44 16.9           SNIapec 19 1
9 OGLE 2014-SN-141 SN* 05 37 18.64 -75 43 17.0           SNIa 6 0
10 2MASX J05371898-7543157 G 05 37 18.9018249408 -75 43 16.457456676           ~ 4 0
11 SN 1999aa SN* 08 27 42.03 +21 29 14.8           SNIap 274 1
12 NGC 2949 G 09 39 52.1446968600 +16 55 04.481925420   15.2       ~ 18 0
13 CRTS MLS130215 J093953+165516 SN* 09 39 53.18 +16 55 16.4           SNIa 7 0
14 Z 8-23 GiG 10 01 11.8770502968 +00 19 45.534479988   15.4       ~ 25 0
15 SN 2013U SN* 10 01 12.00 +00 19 42.3           SNIaPec 15 1
16 CRTS CSS130303 J105206-133424 SN* 10 52 06.06 -13 34 24.7           SNIa 6 0
17 GALEXASC J105206.27-133420.2 UV 10 52 06.280 -13 34 20.25           ~ 3 0
18 SN 1991T SN* 12 34 10.20 +02 39 56.4   11.70 11.51     SNIapec 795 1
19 LEDA 170248 AG? 13 26 50.8089931968 -10 01 26.437673388   15.75   14.55   ~ 19 0
20 SN 2013bz SN* 13 26 51.32 -10 01 32.2           SNIaPec 10 1
21 SN 2011fe SN* 14 03 05.711 +54 16 25.22   10.12 10.06     SNIa-norm 747 1
22 SN 2014dl SN* 16 29 46.1 +08 38 30           SNIa-91T 15 1
23 Z 52-31 GiG 16 29 47.2965556272 +08 38 39.193479636   15.4       ~ 23 0
24 SN 1999ee SN* 22 16 09.40 -36 50 31.5   14.85       SNIa 201 1
25 LEDA 1273459 G 22 53 24.7573756656 +04 47 58.251023484           ~ 10 0
26 ASASSN -14kd SN* 22 53 24.95 +04 47 57.3     16.8     SNIa 15 0
27 LSQ 12gdj SN* 23 54 43.32 -25 40 34.0           SNIa 40 1
28 MCG-04-01-002 G 23 54 45.17 -25 40 22.3   15.81   14.57   ~ 18 0

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