Statistics of interacting galaxies at z ∼ 0.7

Standard

Statistics of interacting galaxies at z ∼ 0.7. / Reshetnikov, V.P.; Mohamed, Y.H.

In: Astronomy Letters, Vol. 37, No. 11, 2011, p. 743-750.

Research output: Contribution to journal › Article › peer-review

Author

Reshetnikov, V.P. ; Mohamed, Y.H. / Statistics of interacting galaxies at z ∼ 0.7. In: Astronomy Letters. 2011 ; Vol. 37, No. 11. pp. 743-750.

BibTeX

@article{921d11b9f500402881be07c179ccbeda,

title = "Statistics of interacting galaxies at z ∼ 0.7",

abstract = "We present the results of our analysis of the frequencies of galaxies with tidal tails and M51-type galaxies in several deep fields of the Hubble Space Telescope (HDF-N, HDF-S, HUDF, GOODS, GEMS). In total, we have found about seven hundred interacting galaxies at redshifts z ≤ 1.5 in these fields. At z ≤ 0.7, the observed space densities of galaxies with tidal structures and M51-type galaxies have been found to increase as ∝(1 + z)^m , where m ≈ 2.6. According to our estimates, over the last 6–7 Gyr, i.e., at z ≤ 0.7, about a third of the galaxies with M(B) ≤ −18 mag must have undergone strong gravitational perturbations and mergers and ∼1/10−1/5 of the galaxies have swallowed relatively low-mass nearby satellites typical of M51-type galaxies. The possible decrease in the time scale on which a distant galaxy appears peculiar with growing z can increase considerably the estimated rate of mergers.",

author = "V.P. Reshetnikov and Y.H. Mohamed",

year = "2011",

doi = "10.1134/S1063773711110028",

language = "English",

volume = "37",

pages = "743--750",

journal = "Astronomy Letters",

issn = "1063-7737",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "11",

}

RIS

TY - JOUR

T1 - Statistics of interacting galaxies at z ∼ 0.7

AU - Reshetnikov, V.P.

AU - Mohamed, Y.H.

PY - 2011

Y1 - 2011

N2 - We present the results of our analysis of the frequencies of galaxies with tidal tails and M51-type galaxies in several deep fields of the Hubble Space Telescope (HDF-N, HDF-S, HUDF, GOODS, GEMS). In total, we have found about seven hundred interacting galaxies at redshifts z ≤ 1.5 in these fields. At z ≤ 0.7, the observed space densities of galaxies with tidal structures and M51-type galaxies have been found to increase as ∝(1 + z)^m , where m ≈ 2.6. According to our estimates, over the last 6–7 Gyr, i.e., at z ≤ 0.7, about a third of the galaxies with M(B) ≤ −18 mag must have undergone strong gravitational perturbations and mergers and ∼1/10−1/5 of the galaxies have swallowed relatively low-mass nearby satellites typical of M51-type galaxies. The possible decrease in the time scale on which a distant galaxy appears peculiar with growing z can increase considerably the estimated rate of mergers.

AB - We present the results of our analysis of the frequencies of galaxies with tidal tails and M51-type galaxies in several deep fields of the Hubble Space Telescope (HDF-N, HDF-S, HUDF, GOODS, GEMS). In total, we have found about seven hundred interacting galaxies at redshifts z ≤ 1.5 in these fields. At z ≤ 0.7, the observed space densities of galaxies with tidal structures and M51-type galaxies have been found to increase as ∝(1 + z)^m , where m ≈ 2.6. According to our estimates, over the last 6–7 Gyr, i.e., at z ≤ 0.7, about a third of the galaxies with M(B) ≤ −18 mag must have undergone strong gravitational perturbations and mergers and ∼1/10−1/5 of the galaxies have swallowed relatively low-mass nearby satellites typical of M51-type galaxies. The possible decrease in the time scale on which a distant galaxy appears peculiar with growing z can increase considerably the estimated rate of mergers.

U2 - 10.1134/S1063773711110028

DO - 10.1134/S1063773711110028

M3 - Article

VL - 37

SP - 743

EP - 750

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 11

ER -

ID: 5158956