2015/03/30 by Tiantian Yuan, T. -T. Yuan, Chiaki Kobayashi +3
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Galaxy #Gamma-ray bursts and supernovae #Metallicity #Neutrino Physics Research #RADIUS #Redshift #Spiral galaxy #Supernova #astro-ph.CO #astro-ph.GA
paper · pdf · doi:10.1088/2041-8205/804/1/l14
5 pages, 3 figures, 1 table; accepted for publication in ApJ Letters
arxiv created 2015/03/30 · openalex publication_date 2015/04/27 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the local H ii region metallicity near the site of the recently discovered multiply lensed supernova (SN; "SN Refsdal") at redshift 1.49. "SN Refsdal" is located at the outer spiral arm (∼7 kpc) of the lensed host galaxy, which we previously reported to exhibit a steep negative galactocentric metallicity gradient. Based on our updated near-infrared integral field spectroscopic data, the gas-phase metallicity averaged in an intrinsic radius of ∼550 pc surrounding an H ii region ∼200 pc away from the SN site is 12 + log(O/H) . The metallicity averaged over nine H ii regions at similar galactocentric distances (∼5–7 kpc) as "SN Refsdal" is constrained to be 12 + log(O/H) . Given the fortuitous discovery of "SN Refsdal" in an advantageously lensed face-on spiral, this is the first observational constraint on the local metallicity environment of an SN site at redshift .