2017A&A...602A...9C


Query : 2017A&A...602A...9C

2017A&A...602A...9C - Astronomy and Astrophysics, volume 602A, 9-9 (2017/6-1)

The evolution of superluminous supernova LSQ14mo and its interacting host galaxy system.

CHEN T.-W., NICHOLL M., SMARTT S.J., MAZZALI P.A., YATES R.M., MORIYA T.J., INSERRA C., LANGER N., KRUHLER T., PAN Y.-C., KOTAK R., GALBANY L., SCHADY P., WISEMAN P., GREINER J., SCHULZE S., MAN A.W.S., JERKSTRAND A., SMITH K.W., DENNEFELD M., BALTAY C., BOLMER J., KANKARE E., KNUST F., MAGUIRE K., RABINOWITZ D., ROSTAMI S., SULLIVAN M. and YOUNG D.R.

Abstract (from CDS):

We present and analyse an extensive dataset of the superluminous supernova (SLSN) LSQ14mo (z=0.256), consisting of a multi-colour light curve from -30 d to +70 d in the rest-frame (relative to maximum light) and a series of six spectra from PESSTO covering -7d to +50d. This is among the densest spectroscopic coverage, and best-constrained rising light curve, for a fast-declining hydrogen-poor SLSN. The bolometric light curve can be reproduced with a millisecond magnetar model with ∼4M ejecta mass, and the temperature and velocity evolution is also suggestive of a magnetar as the power source. Spectral modelling indicates that the SN ejected ∼6M of CO-rich material with a kinetic energy of ∼7x1051erg, and suggests a partially thermalised additional source of luminosity between -2d and +22d. This may be due to interaction with a shell of material originating from pre-explosion mass loss. We further present a detailed analysis of the host galaxy system of LSQ14mo. PESSTO and GROND imaging show three spatially resolved bright regions, and we used the VLT and FORS2 to obtain a deep (five-hour exposure) spectra of the SN position and the three star-forming regions, which are at a similar redshift. The FORS2 spectrum at +300-days shows no trace of SN emission lines and we place limits on the strength of [OI] from comparisons with otherIc supernovae. The deep spectra provides a unique chance to investigate spatial variations in the host star-formation activity and metallicity. The specific star-formation rate is similar in all three components,as is the presence of a young stellar population. However, the position of LSQ14mo exhibits a lower metallicity, with 12+log (O/H)=8.2 in both the R23 and N2 scales (corresponding to ∼0.3Z ). We propose that the three bright regions in the host system are interacting, which could induce gas flows triggering star formation in low-metallicity regions.

Abstract Copyright: © ESO, 2017

Journal keyword(s): supernovae: general - supernovae: individual: LSQ14mo - galaxies: abundances - galaxies: dwarf - galaxies: interactions - galaxies: interactions

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9991 1
2 LSQ 12dlf SN* 01 50 29.80 -21 48 45.4           SNIc 43 0
3 DES14X3taz SN* 02 28 04.46 -04 05 12.7           SNSL-I 33 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6082 1
5 SN 2006gy SN* 03 17 27.06 +41 24 19.5       14.20   SNIIn 306 1
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15673 1
7 L 595-22 PM* 05 56 24.7419816722 -27 51 32.362978169   12.31 12.38     sdG 150 0
8 iPTF 13ehe SN* 06 53 21.50 +67 07 56.0           SLSN-I 55 0
9 LSQ 14bdq SN* 10 01 41.60 -12 22 13.4           SNIc 54 0
10 PSO J155.6730-16.9216 ? 10 22 41.52000 -16 55 17.7600           ~ 1 0
11 LSQ 14mo ev 10 22 41.53 -16 55 14.4           SLSN-I 44 0
12 PS1-11ap SN* 10 48 27.73 +57 09 09.2           SLSNIc 48 0
13 SN 2010gx SN* 11 25 46.71 -08 49 41.4           SNIc 145 1
14 SN 2015bn SN* 11 33 41.57 +00 43 32.2           SNIc 94 0
15 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1290 1
16 NGC 4039 GiP 12 01 53.8 -18 53 06   11.08   9.77   ~ 1139 1
17 SN 2013dg SN* 13 18 41.35 -07 04 43.0           SLSNIc 35 1
18 SN 2007bi SN* 13 19 20.19 +08 55 44.3       18.3   SNIcpec 196 1
19 SN 2011ke SN* 13 50 57.77 +26 16 42.8     18.6     SLSNIc 75 1
20 PTF 12dam SN* 14 24 46.20 +46 13 48.3           SLSNIc 125 0
21 SN 2009dc SN* 15 51 12.12 +25 42 28.0           SNIap 140 1
22 PTF 09cnd SN* 16 12 08.94 +51 29 16.1           SLSNIc 101 0
23 iPTF 13ajg ev 16 39 03.95 +37 01 38.4           SLSN-I 47 0
24 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1710 2
25 SN 2006oz SN* 22 08 53.56 +00 53 50.4           SLSNIc 75 1

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2021.12.05-07:29:49

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