2018A&A...610A..11I


Query : 2018A&A...610A..11I

2018A&A...610A..11I - Astronomy and Astrophysics, volume 610A, 11-11 (2018/2-1)

The host of the Type I SLSN 2017egm. A young, sub-solar metallicity environment in a massive spiral galaxy.

IZZO L., THONE C.C., GARCIA-BENITO R., DE UGARTE POSTIGO A., CANO Z., KANN D.A., BENSCH K., DELLA VALLE M., GALADI-ENRIQUEZ D. and HEDROSA R.P.

Abstract (from CDS):

Context. Type I superluminous supernova (SLSN) host galaxies are predominantly low-metallicity, highly star-forming (SF) dwarfs. One of the current key questions is whether Type I SLSNe can only occur in such environments and hosts.
Aims. Here we present an integral-field study of the massive, high-metallicity spiral NGC 3191, the host of SN 2017egm, the closest Type I SLSN known to date. We use data from PMAS/CAHA and the public MaNGA survey to shed light on the properties of the SLSN site and the origin of star formation in this non-starburst spiral galaxy.
Methods. We map the physical properties of different HII regions throughout the galaxy and characterise their stellar populations using the STARLIGHT fitting code. Kinematical information allows us to study a possible interaction with its neighbouring galaxy as the origin of recent star formation activity which could have caused the SLSN.
Results. NGC 3191 shows intense star formation in the western part with three large SF regions of low metallicity. Taking only the properties of emitting gas, the central regions of the host have a higher metallicity, a lower specific star formation rate, and lower ionisation. Modelling the stellar populations gives a different picture: the SLSN region has two dominant stellar populations with different ages, the younger one with an age of 2-10Myr and lower metallicity, likely the population from which the SN progenitor originated. Emission line kinematics of NGC 3191 show indications of interaction with its neighbour MCG+08-19-017 at ∼45kpc, which might be responsible for the recent starburst. In fact, this galaxy pair has hosted a total of four SNe, 1988B (Type Ia), SN 2003ds (Type Ic in MCG+08-19-017), PTF10bgl (Type II), and 2017egm, underlying the enhanced SF in both galaxies due to interaction.

Abstract Copyright: © ESO, 2018

Journal keyword(s):

Simbad objects: 8

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Number of rows : 8
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 PTF 11hrq SN* 00 51 47.22 -26 25 10.0           SLSN-I 16 0
2 MCG+08-19-017 G 10 18 58.0030340976 +46 27 14.973786864   16       ~ 17 0
3 SN 2003ds SN* 10 18 58.35 +46 27 15.5     18.0     SNIc 12 1
4 PTF 10bgl SN* 10 19 04.70 +46 27 23.3           SNII 9 0
5 SN 1988B SN* 10 19 05.1 +46 27 14   15.5 15.5     SNIa 12 1
6 NGC 3191 G 10 19 05.1420906216 +46 27 14.753214288   13.9       ~ 57 0
7 SN 2017egm SN* 10 19 05.620 +46 27 14.08           SLSN-I 59 0
8 PTF 12dam SN* 14 24 46.20 +46 13 48.3           SLSNIc 135 0

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2022.08.09-02:57:26

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