The SAI catalog of supernovae and radial distributions of supernovae of various types in galaxies

Tsvetkov, D. Yu.; Pavlyuk, N. N.; Bartunov, O. S.

doi:10.1134/1.1819491

Cited by 45 publications

(49 citation statements)

References 12 publications

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“…Bartunov et al (1992) concluded there were no statistical differences in the radial distributions of different SN types. However, later investigations by van den Bergh (1997), Wang et al (1997) and Tsvetkov et al (2004) showed that SNe Ibc are generally more centrally concentrated within galaxies than SNe II, while SNe Ia appeared to show a deficit of events within central regions. The central bias of SNe Ibc with respect to other SN types has historically been interpreted as a metallicity difference as the central parts of spiral galaxies are generally host to higher metallicity stellar populations (due to metallicity gradients within galaxies, see Henry & Worthey 1999 for a review).…”

Section: A Short History Of Supernova Environment Studiesmentioning

confidence: 99%

Statistical Studies of Supernova Environments

Anderson

James

Habergham

et al. 2015

Publ. Astron. Soc. Aust.

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Mapping the diversity of supernovae (SNe) to progenitor properties is key to our understanding of stellar evolution and explosive stellar death. Investigations of the immediate environments of SNe allow statistical constraints to be made on progenitor properties such as mass and metallicity. Here we review the progress that has been made in this field. Pixel statistics using tracers of e.g. star formation within galaxies show intriguing differences in the explosion sites of, in particular SNe types II and Ibc (SNe II and SNe Ibc respectively), suggesting statistical differences in population ages. Of particular interest is that SNe Ic are significantly more associated with host galaxy Hα emission than SNe Ib, implying shorter lifetimes for the former. In addition, such studies have shown (unexpectedly) that the interacting SNe IIn do not explode in regions containing the most massive stars, which suggests that at least a significant fraction of their progenitors arise from the lower end of the core-collapse SN mass range. Host H ii region spectroscopy has been obtained for a significant number of core-collapse events, however definitive conclusions on differences between distinct SN types have to-date been elusive. Single stellar evolution models predict that the relative fraction of SNe Ibc to SNe II should increase with increasing metallicity, due to the dependence of mass-loss rates on progenitor metallicity. We present a meta-analysis of all current host H ii region oxygen abundances for CC SNe. It is concluded that the SN II to SN Ibc ratio shows little variation with oxygen abundance, with only a suggestion that the ratio increases in the lowest bin. Radial distributions of different SNe are discussed, where a central excess of SNe Ibc has been observed within disturbed galaxy systems, which is difficult to ascribe to metallicity or selection effects. Environment studies are also being undertaken for SNe Ia, where constraints can be made on the shortest delay times of progenitor systems. It is shown that 'redder' SNe Ia are more often found within star-forming regions. Environment studies are evolving to enable studies at higher spatial resolutions than previously possible, while in addition the advent of widefield integral field unit instruments allows galaxy-wide spectral analyses which will provide fruitful results to this field. Some example contemporary results are shown in that direction.

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Section: A Short History Of Supernova Environment Studiesmentioning

confidence: 99%

Statistical Studies of Supernova Environments

Anderson

James

Habergham

et al. 2015

Publ. Astron. Soc. Aust.

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“…This catalogue then became the Asiago SN catalogue (ASC; Barbon et al 1989Barbon et al , 1999 and has received great recognition so far. In 1993 another catalogue, the Sternberg Astronomical Institute (SAI) SN catalogue (SSC) was first published (Tsvetkov & Bartunov 1993;Tsvetkov et al 2004).…”

Section: Introductionmentioning

confidence: 99%

A unified supernova catalogue

Lennarz

Altmann

Wiebusch

2012

A&A

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In this paper a new supernova catalogue containing data for 5526 extragalactic supernovae that were discovered up to 2010 December 31 is presented. It combines several catalogues that are currently available online in a consistent and traceable way. During the comparison of the catalogues inconsistent entries were identified and resolved where possible. Remaining inconsistencies are marked transparently and can be easily identified. Thus it is possible to select a high-quality sample in a most simple way. Where available, redshift-based distance estimates to the supernovae were replaced by journal-refereed distances. Examples of statistical studies that are now possible with this new catalogue are presented in this paper.

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“…Often, they were random selections of nearby SNe and their hosts from the Asiago Supernova Catalogue 2 (ASC, Barbon et al 1999) or the Sternberg Astronomical Institute (SAI) Supernova Catalogue 3 (SSC, Tsvetkov et al 2004) or the official list of all the discovered SNe on the Central Bureau for Astronomical Telegrams (CBAT) website 4 . Most recently, Lennarz et al (2012) published a unified SN catalog for 5526 extragalactic SN that were discovered up to 2010 December 31.…”

Section: Introductionmentioning

confidence: 99%

Supernovae and their host galaxies

Hakobyan

Adibekyan

Aramyan

et al. 2012

A&A

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Context. In this first paper of a series, we report the creation of large and well-defined database that combines extensive new measurements and a literature search of 3876 supernovae (SNe) and their 3679 host galaxies located in the sky area covered by the Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8). Aims. This database should be much larger than previous ones, and should contain a homogenous set of global parameters of SN hosts, including morphological classifications and measures of nuclear activity. Methods. The measurements of apparent magnitudes, diameters (D 25 ), axial ratios (b/a), and position angles (PA) of SN host galaxies were made using the images extracted from the SDSS g-band. For each host galaxy, we analyzed RGB images of the SDSS to accurately measure the position of its nucleus to provide the SDSS name. With these images, we also provide the host galaxy's morphological type, and note if it has a bar, a disturbed disk, and whether it is part of an interacting or merging system. In addition, the SDSS nuclear spectra were analyzed to diagnose the central power source of the galaxies. Special attention was paid to collect accurate data on the spectroscopic classes, coordinates, offsets of SNe, and heliocentric redshifts of the host galaxies. Results. Identification of the host galaxy sample is 91% complete (with 3536 SNe in 3340 hosts), of which the SDSS names of ∼1100 anonymous hosts are listed for the first time. The morphological classification is available for 2104 host galaxies, including 73 (56) hosts in interacting (merging) systems. The total sample of host galaxies collects heliocentric redshifts for 3317 (∼90%) galaxies. The g-band magnitudes, D 25 , b/a, and PA are available for 2030 hosts of the morphologically classified sample of galaxies. Nuclear activity measures are provided for 1189 host galaxies. We analyze and discuss many selection effects and biases that can significantly affect any future analysis of our sample. Conclusions. The creation of this large database will help to better understand how the different types of SNe are correlated with the properties of the nuclei and global physical parameters of the host galaxies, and minimize possible selection effects and errors that often arise when data are selected from different sources and catalogs.

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The SAI catalog of supernovae and radial distributions of supernovae of various types in galaxies

Cited by 45 publications

References 12 publications

Statistical Studies of Supernova Environments

Statistical Studies of Supernova Environments

A unified supernova catalogue

Supernovae and their host galaxies

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