H II REGION METALLICITY CONSTRAINTS NEAR THE SITE OF THE STRONGLY LENSED SUPERNOVA "SN REFSDAL" AT REDSHIFT 1.49

Tiantian Yuan; Chiaki Kobayashi; Lisa J. Kewley

doi:10.1088/2041-8205/804/1/L14

H II REGION METALLICITY CONSTRAINTS NEAR THE SITE OF THE STRONGLY LENSED SUPERNOVA "SN REFSDAL" AT REDSHIFT 1.49

Tiantian Yuan, Chiaki Kobayashi, Lisa J. Kewley

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Abstract

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)_PP04N2 ≤ 8.67. 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)_PP04N2 ≤ 8.11. 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 z > 1.

Original language	English
Article number	L14
Journal	Astrophysical Journal Letters
Volume	804
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/804/1/L14
Publication status	Published - 1 May 2015

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title = "H II REGION METALLICITY CONSTRAINTS NEAR THE SITE OF THE STRONGLY LENSED SUPERNOVA {"}SN REFSDAL{"} AT REDSHIFT 1.49",

abstract = "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)PP04N2 ≤ 8.67. 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)PP04N2 ≤ 8.11. 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 z > 1.",

keywords = "galaxies: abundances, gravitational lensing: strong, supernovae: general",

author = "Tiantian Yuan and Chiaki Kobayashi and Kewley, {Lisa J.}",

year = "2015",

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doi = "10.1088/2041-8205/804/1/L14",

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AU - Yuan, Tiantian

AU - Kobayashi, Chiaki

AU - Kewley, Lisa J.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - 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)PP04N2 ≤ 8.67. 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)PP04N2 ≤ 8.11. 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 z > 1.

AB - 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)PP04N2 ≤ 8.67. 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)PP04N2 ≤ 8.11. 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 z > 1.

KW - galaxies: abundances

KW - gravitational lensing: strong

KW - supernovae: general

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U2 - 10.1088/2041-8205/804/1/L14

DO - 10.1088/2041-8205/804/1/L14

M3 - Article

SN - 2041-8205

VL - 804

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L14

ER -

H II REGION METALLICITY CONSTRAINTS NEAR THE SITE OF THE STRONGLY LENSED SUPERNOVA "SN REFSDAL" AT REDSHIFT 1.49

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