Core-Collapse Supernovae From the Palomar Transient Factory: Indications for a Different Population in Dwarf Galaxies

Arcavi, I.; Gal‐Yam, A.; Kasliwal, M. M.; Quimby, R.; Ofek, E. O.; Kulkarni, S. R.; Nugent, P.; Cenko, S. B.; Bloom, J.; Sullivan, M.; Howell, D. A.; Poznanski, D.; Filippenko, A. V.; Law, Nicholas M.; Hook, I. M.; Jönsson, Jakob; Blake, S.; Cooke, Jeff; Dekany, Richard; Rahmer, Gustavo; Hale, David; Smith, R. C.; Zolkower, J.; Velur, V.; Walters, Richard; Henning, John; Bui, K.; McKenna, Dan; Jacobsen, J.

doi:10.1088/0004-637x/721/1/777

Cited by 179 publications

(263 citation statements)

References 57 publications

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“…Then, using M host (r), we obtained an estimate of the metal content (Z host ) for each host via Eq. (1) of Arcavi et al (2010). We plot in Fig.…”

Section: Analysis and Resultsmentioning

confidence: 99%

“…highest amounts of metals (see green line). Since the luminositymetallicity (LZ) relation from Arcavi et al (2010, see also Tremonti et al 2004) is known to be affected by large dispersion, we also estimate the host Z via the luminosity-color-metallicity (LCZ) relation by Sanders et al (2013). Making use of their O3N2 calibration along with M host (g) and (g−r) host for each host in order to get the oxygen abundances, these abundances were then converted into Z host .…”

Section: Analysis and Resultsmentioning

confidence: 99%

“…Arcavi et al (2010) studied the PTF SN populations in dwarf galaxies, finding an excess of SNe IIb as compared to the SN population in brighter hosts. Thanks to the high cadence of PTF and iPTF [hereafter (i)PTF], for many targets there are also good constraints on the explosion epoch.…”

Section: Introductionmentioning

confidence: 99%

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Metallicity from Type II supernovae from the (i)PTF

Taddia

Moquist

Sollerman

et al. 2016

A&A

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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 (pEW 5018 ) during the plateau phase depends on the primordial Z, but there was a paucity of SNe IIP exhibiting pEW 5018 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. Here we use SN II observations from the untargeted (intermediate) Palomar Transient Factory [(i)PTF] survey, aiming to investigate the pEW 5018 distribution of this SN population and, in particular, to look for the presence of SNe II at lower Z. We perform pEW 5018 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 pEW 5018 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 pEW 5018 . We found 11 events with pEW 5018 that were small enough to indicate Z ≈ 0.1 Z . The trend of pEW 5018 with Z matches the Z estimates obtained from the host-galaxy photometry, although the significance of the correlation is weak. We also found that SNe with brighter peak magnitudes have smaller pEW 5018 and occur at lower Z.

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“…Then, using M host (r), we obtained an estimate of the metal content (Z host ) for each host via Eq. (1) of Arcavi et al (2010). We plot in Fig.…”

Section: Analysis and Resultsmentioning

confidence: 99%

Section: Analysis and Resultsmentioning

confidence: 99%

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Metallicity from Type II supernovae from the (i)PTF

Taddia

Moquist

Sollerman

et al. 2016

A&A

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“…Nevertheless, interesting trends have emerged: Studies to measure the metallicity by using the SN host-galaxy luminosity as a proxy (Prantzos & Boissier 2003;Arcavi et al 2010), or by using the metallicity of the galaxy center measured from Sloan Digital Sky Survey (SDSS) spectra (Prieto et al 2008) to extrapolate to that at the SN position (Boissier & Prantzos 2009) find a) that host galaxies of SNe Ib/c found in targeted surveys seem to be in more luminous and more metal-rich galaxies than those of SNe II (Prieto et al 2008;Boissier & Prantzos 2009) and b) that SNe Ic are missing in low-luminosity and presumably, low-metallicity galaxies of the untargetted survey PTF, while SN II, Ib, and Ic-bl are abundant there (Arcavi et al 2010). Those prior metallicity studies do not directly probe the local environment of each SN (which can be different from the galaxy center due to metallicity gradients) nor do some differentiate between the different SN subtypes.…”

Section: Metallicity Of Various Regular Types Of Ccsnmentioning

confidence: 99%

“…However, the new surveys alleviate this galaxy-and metallicity-bias and PTF has already found over 1090 spectroscopically ID'ed SNe (as of April 2011) in this galaxy-untargeted fashion, probing SNe and transients in all kinds of galactic environments (except in highly obscured ones, of course). The difference in survey mode appears to be important: using core-collapse SN discovered with PTF, Arcavi et al (2010) showed that different populations of galaxies may be hosting different types of stripped SNe. The least stripped SN (SN IIb) were found in the low luminosity galaxies (dwarfs), which Arcavi et al took to indicate a metallicity effect, where the massive progenitor at low-metallicity did not have sufficiently strong winds to remove its He layer in order to explode as a SN Ic.…”

Section: Sn 2008d/xrt080109: Stellar Forensics By Witnessing the Deatmentioning

confidence: 99%

Stellar Forensics with the Supernova‐GRB Connection

Modjaz¹

2011

Reviews in Modern Astronomy

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Long-duration gamma-ray bursts (GRBs) and Type Ib/c Supernovae (SNe Ib/c) are amongst nature's most magnificent explosions. While GRBs launch relativistic jets, SNe Ib/c are core-collapse explosions whose progenitors have been stripped of their hydrogen and helium envelopes. Yet for over a decade, one of the key outstanding questions is which conditions lead to each kind of explosion and death in massive stars. Determining the fates of massive stars is not only a vibrant topic in itself, but also impacts using GRBs as star formation indicators over distances of up to 13 billion light-years and for mapping the chemical enrichment history of the universe. This article reviews a number of comprehensive observational studies that probe the progenitor environments, their metallicities and the explosion geometries of SN with and without GRBs, as well as the emerging field of SN environmental studies. Furthermore, it discusses SN 2008D/XRT 080109 which was discovered serendipitously with the Swift satellite via its X-ray emission from shock breakout, and which has generated great interest amongst both observers and theorists while illustrating a novel technique for stellar forensics. The article concludes with an outlook on how the most promising venues of research -with the many existing and upcoming large-scale surveys such as the Palomar Transient Factory and LSST -will shed new light on the diverse deaths of massive stars.

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Stellar forensics with the supernova‐GRB connection – Ludwig Biermann Award Lecture 2010

Modjaz¹

2011

Astron Nachr

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Long-duration gamma-ray bursts (GRBs) and type Ib/c supernovae (SNe Ib/c) are amongst nature's most magnificent explosions. While GRBs launch relativistic jets, SNe Ib/c are core-collapse explosions whose progenitors have been stripped of their hydrogen and helium envelopes. Yet for over a decade, one of the key outstanding questions is what conditions lead to each kind of explosion in massive stars. Determining the fates of massive stars is not only a vibrant topic in itself, but also impacts using GRBs as star formation indicators over distances up to 13 billion light-years and for mapping the chemical enrichment history of the universe. This article reviews a number of comprehensive observational studies that probe the progenitor environments, their metallicities and the explosion geometries of SN with and without GRBs, as well as the emerging field of SN environmental studies. Furthermore, it discusses SN 2008D/XRT 080109 which was discovered serendipitously with the Swift satellite via its X-ray emission from shock breakout and which generated great interest amongst both observers and theorists while illustrating a novel technique for stellar forensics. The article concludes with an outlook on how the most promising venues of research -with the many existing and upcoming large-scale surveys such as PTF and LSST -will shed new light on the diverse deaths of massive stars.

show abstract

Core-Collapse Supernovae From the Palomar Transient Factory: Indications for a Different Population in Dwarf Galaxies

Cited by 179 publications

References 57 publications

Metallicity from Type II supernovae from the (i)PTF

Metallicity from Type II supernovae from the (i)PTF

Stellar Forensics with the Supernova‐GRB Connection

Stellar forensics with the supernova‐GRB connection – Ludwig Biermann Award Lecture 2010

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