2020PASP..132c4101Z


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET23:44:10

2020PASP..132c4101Z - Publ. Astron. Soc. Pac., 132, part no 3, 4101-34101 (2020/March-0)

The Multi-Object Spectroscopy observation of seven interacting galaxy pairs: metallicity gradients and star formation distributions.

ZHANG B.-Q., CAO C., XU C.K., ZHOU Z.-M. and WU H.

Abstract (from CDS):

We use the Multi-Object Spectroscopy system of Xinglong 2.16 m telescope to study the gradients of gas-phase oxygen abundance and the distributions of star formation activities of seven nearby interacting galaxy pairs. On the basis of emission line luminosities and flux ratios, we estimate the gas-phase metallicities (log(O/H)), excitation mechanisms, and star formation rates (SFRs) of different regions in each galaxy. The average radial slope of log(O/H) from linear fitting of galaxy pairs in our sample is significantly flatter than that of isolated disk galaxies, also the central metallicity is much lower for interacting galaxies. This supports the predictions and results of previous theoretical numerical simulations and observational works which show the cold gas inflows induced by galaxy interactions can dilute the central metallicity. From the analysis of the radial distribution of SFR surface densities (ΣSFR), we find that, in our sample, galaxies in Spiral-Spiral (S+S) pairs have peak ΣSFR at the center region and lower SFRs at the outer parts than that at the center. On the other hand, for two spirals in Spiral-Elliptical (S+E) pairs (Arp142 and J0338+2120), they both have relatively higher (ΣSFR) in their off-nuclei regions. This may hint a dependence of star formation distributions for paired galaxies on their companion morphologies.

Abstract Copyright: © 2020. The Astronomical Society of the Pacific. All rights reserved.

Journal keyword(s):

Simbad objects: 14

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Number of rows : 14

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 KPAIR J0118-0013 PaG 01 18 35.3 -00 13 51   15.1       ~ 12 0
2 KPAIR J0338+0109 PaG 03 38 12.6 +01 09 55           ~ 3 0
3 KPAIR J0823+2120 PaG 08 23 33.4 +21 20 34           ~ 2 0
4 APG 142 PaG 09 37 44.6 +02 45 15           ~ 19 0
5 NGC 3349 rG 10 43 50.557 +06 45 46.64   15.2       ~ 21 0
6 KPAIR J1043+0645 PaG 10 43 51.6 +06 45 36           ~ 3 0
7 APG 24 G 10 54 40.1 +56 59 11           ~ 80 0
8 NGC 4485 GiP 12 30 31.113 +41 42 04.22 12.10 12.42 11.93 11.93   ~ 257 2
9 NGC 4490 GiP 12 30 36.368 +41 38 37.07 10.03 10.22 9.79     ~ 534 3
10 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2604 2
11 KPAIR J1602+4111 PaG 16 02 43.7 +41 11 55           ~ 3 0
12 KPAIR J1608+2328 PaG 16 08 23.1 +23 28 35           ~ 2 0
13 NGC 6365 IG 17 22 43.518 +62 10 25.20   14.6       ~ 33 0
14 APG 86 PaG 23 47 01.7 +29 28 16           ~ 129 1

    Equat.    Gal    SGal    Ecl

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2021.03.05-23:44:10

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