Close neighbors of Markarian galaxies. I. Optical database

According to the database from the first paper, we select 180 pairs with dV < 800 km s −1 and Dp < 60 kpc containing Markarian (MRK) galaxies. We study the dependence of galaxies integral parameters, star-formation (SF) and active galactic nuclei (AGN) properties on kinematics of pairs, their structure and large-scale environments. Following main results were obtained: projected radial separation Dp between galaxies correlates with the perturbation level P of the pairs. Both parameters do not correlate with line-of-sight velocity difference dV of galaxies. Dp and P are better measures of interaction strength than dV . The latter correlates with the density of large-scale environment and with the morphologies of galaxies. Both galaxies in a pair are of the same nature, the only difference is that MRK galaxies are usually brighter than their neighbors in average by 0.9 mag. Specific star formation rates (SSFR) of galaxies in pairs with smaller Dp or dV is in average 0.5 dex higher than that of galaxies in pairs with larger Dp or dV . Closeness of a neighbor with the same and later morphological type increases the SSFR, while earlier-type neighbors do not increase SSFR. Major interactions/mergers trigger SF and AGN more effectively than minor ones. The fraction of AGNs is higher in more perturbed pairs and pairs with smaller Dp. AGNs typically are in stronger interacting systems than star-forming and passive galaxies. There are correlations of both SSFRs and spectral properties of nuclei between pair members.

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“…In [36], three criteria were used to select the sample of close neighbors of MRK galaxies. (1) Redshift of MRK galaxy should be more than 0.005.…”

Section: The Samplementioning

confidence: 99%

“…In our first paper of a series [36], we have reported the creation of the database of close neighbors of MRK galaxies, which contains extensive new measurements of their optical parameters, collected near-IR data, and pair properties. This is a second paper of a series and the outline is as follows: Sect.…”

Section: Introductionmentioning

confidence: 99%

Close Neighbors of Markarian Galaxies. II. Statistics and Discussions

et al. 2014

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“…In Petrosian et al (2007), homogeneously measured parameters of MRK galaxies are presented. Results of a close neighbors search for MRK galaxies are published in Nazaryan et al (2012). For the current study, the subsample of 217 pairs of galaxies containing at least one MRK galaxy is selected.…”

Section: Samplementioning

confidence: 99%

“…close neighbor and nuclear activity and/or enhanced SF in galaxy pairs using the sample of close neighbors of MRK galaxies from Nazaryan et al (2012). The complete study is presented in Nazaryan et al (2014).…”

Section: Introductionmentioning

confidence: 99%

Close pairs of galaxies with different activity levels

Nazaryan¹,

Петросян²,

Hakobyan³

et al. 2013

Proc. IAU

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We selected and studied 180 pairs with dV < 800 km/s and Dp < 60 kpc containing Markarian (MRK) galaxies to investigate the dependence of galaxies' integral parameters, star-formation (SF) and active galactic nuclei (AGN) properties on kinematics of pairs, their structure and large-scale environments. Projected radial separation Dp and perturbation level P are better measures of interaction strength than dV. The latter correlates with the density of large-scale environment and with the morphologies of galaxies. Both galaxies in a pair are of the same nature, the only difference is that MRK galaxies are usually righter than their neighbors. Specific star formation rates (SSFR) of galaxies in pairs with smaller Dp or dV is in average 0.5 dex higher than that of galaxies in pairs with larger Dp or dV. Closeness of a neighbor with the same and later morphological type increases the SSFR, while earlier-type neighbors do not increase SSFR. Major interactions/mergers trigger SF and AGN more effectively than minor ones. The fraction of AGNs is higher in more perturbed pairs and pairs with smaller Dp. AGNs typically are in stronger interacting systems than star-forming and passive galaxies. There are correlations of both SSFRs and spectral properties of nuclei between pair members.Comment: 4 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1310.024

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“…These catalogs are the following: (1) the catalog of Markarian (MRK) galaxies, (2) the Second Byurakan Survey (SBS) galaxies catalog, and (3) the North Galactic Pole (NGP) galaxy catalog. Results of a close neighbors search for MRK galaxies are published (Nazaryan et al 2012). We also conducted the search of neighbors for SBS and NGP galaxies using the same criteria.…”

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confidence: 99%

Supernovae in paired galaxies

Nazaryan¹,

Петросян²,

Hakobyan³

et al. 2013

Proc. IAU

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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 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.Comment: 2 pages. arXiv admin note: text overlap with arXiv:1312.494

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Close neighbors of Markarian galaxies. I. Optical database

Cited by 5 publications

References 27 publications

Close Neighbors of Markarian Galaxies. II. Statistics and Discussions

Close Neighbors of Markarian Galaxies. II. Statistics and Discussions

Close pairs of galaxies with different activity levels

Supernovae in paired galaxies

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