2014MNRAS.437.1519V


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST19:30:02

2014MNRAS.437.1519V - Mon. Not. R. Astron. Soc., 437, 1519-1533 (2014/January-2)

PESSTO monitoring of SN 2012hn: further heterogeneity among faint Type I supernovae.

VALENTI S., YUAN F., TAUBENBERGER S., MAGUIRE K., PASTORELLO A., BENETTI S., SMARTT S.J., CAPPELLARO E., HOWELL D.A., BILDSTEN L., MOORE K., STRITZINGER M., ANDERSON J.P., BENITEZ-HERRERA S., BUFANO F., GONZALEZ-GAITAN S., McCRUM M.G., PIGNATA G., FRASER M., GAL-YAM A., LE GUILLOU L., INSERRA C., REICHART D.E., SCALZO R., SULLIVAN M., YARON O. and YOUNG D.R.

Abstract (from CDS):

We present optical and infrared monitoring data of SN 2012hn collected by the Public European Southern Observatory Spectroscopic Survey for Transient Objects. We show that SN 2012hn has a faint peak magnitude (MR ∼ -15.65) and shows no hydrogen and no clear evidence for helium in its spectral evolution. Instead, we detect prominent Caii lines at all epochs, which relates this transient to previously described `Ca-rich' or `gap' transients. However, the photospheric spectra (from -3 to +32d with respect to peak) of SN 2012hn show a series of absorption lines which are unique and a red continuum that is likely intrinsic rather than due to extinction. Lines of Tiii and Crii are visible. This may be a temperature effect, which could also explain the red photospheric colour. A nebular spectrum at +150d shows prominent Caii, Oi, Ci and possibly Mgi lines which appear similar in strength to those displayed by core-collapse supernovae (SNe). To add to the puzzle, SN 2012hn is located at a projected distance of 6 kpc from an E/S0 host and is not close to any obvious star-forming region. Overall SN 2012hn resembles a group of faint H-poor SNe that have been discovered recently and for which a convincing and consistent physical explanation is still missing. They all appear to explode preferentially in remote locations offset from a massive host galaxy with deep limits on any dwarf host galaxies, favouring old progenitor systems. SN 2012hn adds heterogeneity to this sample of objects. We discuss potential explosion channels including He-shell detonations and double detonations of white dwarfs as well as peculiar core-collapse SNe.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): supernovae: general - supernovae: individual: 2012hn

CDS comments: Reference stars in Tables A3, A4 and Figure 2 are not in Simbad.

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 SN 1990aa SN* 00 52 54 +29 01.1     17     SNIc 34 1
2 SN 2005E SN* 02 39 14.34 +01 05 55.0     16.8     SNIb/c 107 1
3 SN 2007gr SN* 02 43 27.98 +37 20 44.7       12.77   SNIc 185 1
4 SN 2007ke SN* 02 54 23.90 +41 34 16.3     18.5     SNIb 29 1
5 SN 2007Y SN* 03 02 35.92 -22 53 50.1     17.5     SNIb 88 1
6 SN 1999em SN* 04 41 27.04 -02 51 45.2   13.79 13.7     SNIIP 583 1
7 SN 2010X SN* 04 48 27.90 +73 28 14.8           SNIc 63 1
8 SN 2002bj SN* 05 11 46.41 -15 08 10.8     14.8     SNIIn 71 1
9 NGC 2272 GiG 06 42 41.307 -27 27 34.14   12.74 11.88 10.75 11.8 ~ 37 0
10 SN 2012hn SN* 06 42 42.55 -27 26 49.8           SNIcPec 24 1
11 SN 2005bl SN* 12 04 12.24 +20 24 24.6           SNIap 85 1
12 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 528 1
13 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5906 0
14 SN 2005cz SN* 12 37 27.85 +74 11 24.5     16.0     SNIb 44 1
15 PTF 11bij SN* 12 58 58.39 +37 23 12.0       19.9   ~ 14 0
16 SN 1994A SN* 13 07 38.7 +62 12 50     18     SNII 12 1
17 SN 2002cx SN* 13 13 49.72 +06 57 31.9   17.68       SNIapec 196 1
18 SN 1994I SN* 13 29 54.072 +47 11 30.50     12.9     SNIc 568 1
19 SN 2005cf SN* 15 21 33.12 -07 26 57.1   13.54       SNIa 239 1
20 SN 2010et SN* 17 16 54.08 +31 33 50.6           ~ 14 1
21 PTF 10iuv SN* 17 16 54.27 +31 33 51.7       21.2   ~ 23 0
22 SN 2004eo SN* 20 32 54.19 +09 55 42.7   15.07 17.8     SNIa 170 1
23 PTF 09dav SN* 22 46 55.15 +21 37 34.1           ~ 32 0
24 SN 2009jf SN* 23 04 52.98 +12 19 59.5           SNIb 70 1
25 SN 1990U SN* 23 04 54.96 +12 18 20.1   17.76       SNIb 56 1
26 SN 2008ha SN* 23 34 52.69 +18 13 35.4           SNIax 152 1
27 NAME Local Group GrG ~ ~           ~ 7067 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-19:30:02

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