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Title: Metallicity from Type II supernovae from the (i)PTF

Journal Article · · Astronomy and Astrophysics
 [1];  [1];  [1];  [2];  [3];  [2];  [4];  [5];  [6];  [6];  [7];  [8];  [9];  [10];  [11];  [2]
  1. Stockholm Univ. (Sweden)
  2. Weizmann Inst. of Science, Rehovot (Israel)
  3. Weizmann Inst. of Science, Rehovot (Israel); Univ. of Copenhagen (Denmark)
  4. Las Cumbres Observatory Global Telescope, Goleta, CA (United States); Univ. of California, Santa Barbara, CA (United States)
  5. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  6. Univ. of California, Berkeley, CA (United States)
  7. Liverpool John Moores Univ., Liverpool (United Kingdom); Max Planck Inst. for Astrophysics, Garching (Germany)
  8. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  9. Univ. of Illinois, Urbana, IL (United States)
  10. Univ. of Texas, Austin, TX (United States)
  11. Chinese Academy of Sciences (CAS), Beijing (China)
+ Show Author Affiliations

Type IIP supernovae (SNe IIP) have recently been proposed as metallicity (Z) probes. The spectral models of Dessart et al. (2014, MNRAS, 440, 1856) showed that the pseudo-equivalent width of Fe ii λ5018 (pEW5018) during the plateau phase depends on the primordial Z, but there was a paucity of SNe IIP exhibiting pEW5018 that were compatible with Z < 0.4 Z⊙. This lack might be due to some physical property of the SN II population or to the fact that those SNe have been discovered in luminous, metal-rich targeted galaxies. In this paper, we use SN II observations from the untargeted (intermediate) Palomar Transient Factory [(i)PTF] survey, aiming to investigate the pEW5018 distribution of this SN population and, in particular, to look for the presence of SNe II at lower Z. We perform pEW5018 measurements on the spectra of a sample of 39 (i)PTF SNe II, selected to have well-constrained explosion epochs and light-curve properties. Based on the comparison with the pEW5018 spectral models, we subgrouped our SNe into four Z bins from Z ≈ 0.1 Z⊙ up to Z ≈ 2 Z⊙. We also independently investigated the Z of the hosts by using their absolute magnitudes and colors and, in a few cases, using strong-line diagnostics from spectra. We searched for possible correlations between SN observables, such as their peak magnitudes and the Z inferred from pEW5018. We found 11 events with pEW5018 that were small enough to indicate Z ≈ 0.1 Z⊙. The trend of pEW5018 with Z matches the Z estimates obtained from the host-galaxy photometry, although the significance of the correlation is weak. Finally, we also found that SNe with brighter peak magnitudes have smaller pEW5018 and occur at lower Z.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); Swedish Research Council (SRC); European Research Council (ERC); Israel Science Foundation (ISF)
Grant/Contract Number:
AC02-05CH11231; AST-1211916; AST-1302771; 307260
OSTI ID:
1393032
Journal Information:
Astronomy and Astrophysics, Vol. 587; ISSN 0004-6361
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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Cited By (13)

The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor journal May 2018
Spectral modeling of type II supernovae: II. A machine-learning approach to quantitative spectroscopic analysis journal January 2020
SN 2016esw: a luminous Type II supernova observed within the first day after the explosion journal May 2018
Type II supernovae in low-luminosity host galaxies journal June 2018
A Type II Supernova Hubble Diagram from the CSP-I, SDSS-II, and SNLS Surveys journal January 2017
KSP-SN-2016kf: A Long-rising H-rich Type II Supernova with Unusually High 56 Ni Mass Discovered in the KMTNet Supernova Program journal August 2019
On the Origin of SN 2016hil—A Type II Supernova in the Remote Outskirts of an Elliptical Host journal December 2019
Bright Type IIP Supernovae in Low-metallicity Galaxies journal January 2019
SN 2016esw: a luminous Type II supernova observed within the first day after the explosion text January 2018
The lowest metallicity type II supernova from the highest mass red-supergiant progenitor preprint January 2018
Bright Type IIP Supernovae in Low-Metallicity Galaxies text January 2018
KSP-SN-2016kf: a long-rising H-rich Type II Supernova with unusually high $^{56}$Ni mass discovered in the KMTNet Supernova Program text January 2019
Spectral modeling of type II supernovae II. A machine learning approach to quantitative spectroscopic analysis text January 2019

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
supernovae
galaxies
abundances