2016MNRAS.462.3419Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.18CET04:17:14

2016MNRAS.462.3419Z - Mon. Not. R. Astron. Soc., 462, 3419-3429 (2016/November-2)

Tidal bridge and tidal dwarf candidates in the interacting system Arp194.

ZASOV A.V., SABUROVA A.S., EGOROV O.V. and AFANASIEV V.L.

Abstract (from CDS):

Arp194 is a system of recently collided galaxies, where the southern galaxy (S) passed through the gaseous disc of the northern galaxy (N) which in turn consists of two close components. This system is of special interest due to the presence of regions of active star formation in the bridge between galaxies, the brightest of which (the region A) has a size of at least 4 kpc. We obtained three spectral slices of the system for different slit positions at the 6-m telescope of SAO RAS. We estimated the radial distribution of line-of-sight velocity and velocity dispersion as well as the intensities of emission lines and oxygen abundance 12 + log (O/H). The gas in the bridge is only partially mixed chemically and spatially: we observe the O/H gradient with the galactocentric distances both from S and N galaxies and a high dispersion of O/H in the outskirts of N-galaxy. Velocity dispersion of the emission-line gas is the lowest in the star-forming sites of the bridge and exceeds 50-70 km s–1 in the disturbed region of N-galaxy. Based on the SDSS photometrical data and our kinematical profiles we measured the masses of stellar population and the dynamical masses of individual objects. We confirm that the region A is the gravitationally bound tidal dwarf with the age of 107-108 yr, which is falling on to the parent S-galaxy. There is no evidence of the significant amount of dark matter in this dwarf galaxy.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: evolution - galaxies: individual: Arp194 - galaxies: interactions - galaxies: kinematics and dynamics - galaxies: star formation - galaxies: star formation

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Taffy System PaG 00 01 40.12 +23 29 23.0           ~ 46 2
2 NGC 341 IG 01 00 45.813 -09 11 08.75   14.1   13.8 13.4 ~ 48 0
3 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 970 0
4 NGC 3395 GiP 10 49 50.116 +32 58 58.22   12.1 12.10     ~ 258 2
5 UGC 6945 IG 11 57 54.87 +36 23 32.8   15.1       ~ 23 0
6 HD 105183 HS* 12 06 47.2351675221 +11 40 12.658737086   10.93 11.06     sdB8IIIHe2 103 0
7 NGC 4490 GiP 12 30 36.368 +41 38 37.07 10.03 10.22 9.79     ~ 520 3
8 HZ 44 HS* 13 23 35.2632775627 +36 07 59.545982652 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 368 0
9 BD+33 2642 pA* 15 51 59.8857490337 +32 56 54.327647794 9.806 10.61 10.73 10.884 10.961 O7p 370 0

    Equat.    Gal    SGal    Ecl

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2020.02.18-04:17:14

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