Angus, Charlotte R., Levan, Andrew J., Perley, D. A., Tanvir, N. R., Lyman, J. D., Stanway, Elizabeth R. and Fruchter, A. S. (2016) A Hubble Space Telescope survey of the host galaxies of Superluminous Supernovae. Monthly Notices of the Royal Astronomical Society, 458 (1). pp. 84-104. doi:10.1093/mnras/stw063

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Abstract

We present Hubble Space Telescope (HST) Wide Field Camera 3 UV and near-IR (nIR) imaging of 21 Superluminous Supernovae (SLSNe) host galaxies, providing a sensitive probe of star formation and stellar mass within the hosts. Comparing the photometric and morphological properties of these host galaxies with those of core-collapse supernovae (CCSNe) and long-duration gamma-ray bursts (LGRBs), we find SLSN hosts are fainter and more compact at both UV and nIR wavelengths, in some cases we barely recover hosts with absolute magnitude around MV ≈ −14. With the addition of ground based optical observations and archival results, we produce spectral energy distribution fits to these hosts, and show that SLSN hosts possess lower stellar mass and star formation rates. This is most pronounced for the hydrogen deficient Type-I SLSN hosts, although Type-II H-rich SLSN host galaxies remain distinct from the bulk of CCSNe, spanning a remarkably broad range of absolute magnitudes, with ∼30 per cent of SLSNe-II arising from galaxies fainter than MnIR ∼ −14. The detection of our faintest SLSN hosts increases the confidence that SLSNe-I hosts are distinct from those of LGRBs in star formation rate and stellar mass, and suggests that apparent similarities in metallicity may be due to the limited fraction of hosts for which emission line metallicity measurements are feasible. The broad range of luminosities of SLSN-II hosts is difficult to describe by metallicity cuts, and does not match the expectations of any reasonable UV-weighted luminosity function, suggesting additional environmental constraints are likely necessary to yield hydrogen rich SLSNe.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Supernovae, Dwarf galaxies, Starbursts
Journal or Publication Title:	Monthly Notices of the Royal Astronomical Society
Publisher:	Oxford University Press
ISSN:	0035-8711
Official Date:	1 May 2016
Dates:	Date Event 1 May 2016 Published 7 January 2016 Accepted 4 March 2016 Available 7 January 2016 Submitted
Date of first compliant deposit:	24 October 2016
Volume:	458
Number:	1
Page Range:	pp. 84-104
DOI:	10.1093/mnras/stw063
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Midlands Physics Alliance Graduate School (MPAGS), Science and Technology Facilities Council (Great Britain) (STFC), Leverhulme Trust (LT), United States. National Aeronautics and Space Administration (NASA), Hubble Space Telescope (Spacecraft) (HST), European Southern Observatory (ESO), Royal Greenwich Observatory. Isaac Newton Group of Telescopes (Santa Cruz de la Palma, Canary Islands)
Grant number:	ST/I001719/1, ST/L000733/1 (STFC), NAS 5-26555 (NASA), GO-13025, GO-13480 (HST), ID 092.D-0815 (ESO)

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