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Paired galaxies with different activity levels and their supernovae

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Abstract

We investigate the influence of close neighbor galaxies on the properties of supernovae (SNe) and their host galaxies using 56 SNe located in pairs of galaxies with different levels of star formation (SF) and nuclear activity. The statistical study of SN hosts shows that there is no significant difference between morphologies of hosts in our sample and the larger general sample of SN hosts in the Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8). The mean distance of type II SNe from nuclei of hosts is greater by about a factor of 2 than that of type Ibc SNe. The distributions and mean distances of SNe are consistent with previous results compiled with the larger sample. For the first time it is shown that SNe Ibc are located in pairs with significantly smaller difference of radial velocities between components than pairs containing SNe Ia and II. We consider this as a result of higher star formation rate (SFR) of these closer systems of galaxies. SN types are not correlated with the luminosity ratio of host and neighbor galaxies in pairs. The orientation of SNe with respect to the preferred direction toward neighbor galaxy is found to be isotropic and independent of kinematical properties of the galaxy pair.

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Notes

  1. The notation type Ibc SNe is often used to indicate globally the entire class of stripped-envelope SNe, i.e Ib, Ic and intermediate cases.

  2. However, in the following we will make comparison with radial distances of SNe Ia computed in similar way.

  3. MFA coefficients are invariant with respect to linear transformations of any initial parameter, so our BPT coding does not affect the MFA results significantly.

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Acknowledgements

A.R.P., A.A.H., and L.S.A. acknowledge the hospitality of the Institut d’Astrophysique de Paris (France) during their stay as visiting scientists supported by the Collaborative Bilateral Research Project of the State Committee of Science (SCS) of the Republic of Armenia and the French Centre National de la Recherché Scientifique (CNRS). This work was made possible in part by a research grant from the Armenian National Science and Education Fund (ANSEF) based in New York, USA. V.Zh.A. is supported by grant SFRH/BPD/70574/2010 from FCT (Portugal) and would further like to thank for the support by the ERC under the FP7/EC through a Starting Grant agreement number 239953. We gratefully acknowledge the Anonymous Referee for the constructive comments and suggestions. This research made use of the NASA/IPAC Extragalactic Database (NED), which is available at http://ned.ipac.caltech.edu/, and operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the US Department of Energy Office of Science. The SDSS-III web site is http://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, University of Cambridge, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. This publication makes use of data products from the Digitized Sky Survey produced at the Space Telescope Science Institute under US Government grant NAG W-2166. The images of this survey are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present digital form with the permission of these institutions. The Second Palomar Observatory Sky Survey (POSS-II) was made by the California Institute of Technology with funds from the National Science Foundation, the National Aeronautics and Space Administration, the National Geographic Society, the Sloan Foundation, the Samuel Oschin Foundation, and the Eastman Kodak Corporation.

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Correspondence to T. A. Nazaryan.

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Nazaryan, T.A., Petrosian, A.R., Hakobyan, A.A. et al. Paired galaxies with different activity levels and their supernovae. Astrophys Space Sci 347, 365–374 (2013). https://doi.org/10.1007/s10509-013-1511-5

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