2020AJ....159..141P


Query : 2020AJ....159..141P

2020AJ....159..141P - Astron. J., 159, 141-141 (2020/April-0)

MCG+07-20-052: interacting dwarf pair in a group environment.

PAUDEL S., SENGUPTA C., YOON S.-J. and CHHATKULI D.N.

Abstract (from CDS):

We present an observational study of the interacting pair of dwarf galaxies, MCG+07-20-052, in the vicinity of Milky Way mass spiral galaxy NGC 2998. MCG+07-20-052 is located at a sky-projected distance of 105 kpc from NGC 2998 and the two have a relative line-of-sight velocity of 60 km s–1. We observed tidal tail-like extensions on both members (D1 and D2) of the interacting pair MCG+07-20-052. The interacting dwarf galaxies, D1 and D2, have B-band absolute magnitudes of -17.17 and -17.14 mag, respectively, and D2 is significantly bluer than D1. We obtained H I 21 cm line data of the NGC 2998 system using the Giant Metrewave Radio Telescope to get a more detailed view of the neutral hydrogen (H I) emission in the interacting dwarf galaxies and in the galaxy members of the NGC 2998 group. Evidence of a merger between the dwarf galaxies in the MCG+07-20-052 is also present in the H I kinematics and morphology where we find that H I is mostly concentrated around D2, which also shows a higher level of star-forming activity and a bluer g-r color index compared to D1. In addition, we detect extended tenuous H I emission around another member galaxy, NGC 3006, located close to the MCG+07-20-052 pair at a sky-projected distance of 41 kpc. We compare here our results from the MCG+07-20-052 pair NGC 2998 system with other known Large Magellanic Cloud/Small Magellanic Cloud/Milky Way-type systems and discuss the possible origin of the dwarf-dwarf interaction.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Draco dwarf galaxy - Interacting galaxies - Star formation - Hi line emission

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Magellanic Stream HVC 00 32 -30.0           ~ 902 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10362 1
3 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1630 1
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6408 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16244 1
6 UGC 4703 A G 08 58 25.09 +06 20 05.0   17.32 16.71     ~ 13 1
7 UGC 4703 G 08 58 29.864 +06 19 17.26   16.23 15.69     ~ 39 0
8 NGC 2718 AGN 08 58 50.468 +06 17 34.78   14.97 14.24     ~ 91 0
9 NGC 2998 LIN 09 48 43.6305155160 +44 04 53.217027660   13.3       ~ 201 0
10 NAME NGC 2998 Group GrG 09 49.0 +44 03           ~ 1 0
11 SDSS J094906.46+440254.3 GiP 09 49 06.46872 +44 02 54.3552           ~ 2 0
12 NGC 3002 G 09 49 06.645 +44 02 55.25   16       ~ 8 0
13 SDSS J094908.71+440247.8 GiP 09 49 08.71392 +44 02 47.8896           ~ 1 0
14 NGC 3005 G 09 49 15.007 +44 07 52.86   16       ~ 21 0
15 NGC 3006 G 09 49 17.3440868280 +44 01 33.118658436   15.6       ~ 12 0
16 MCG+07-20-057 GiG 09 49 21.254 +43 55 03.89   15.2       ~ 11 0
17 SDSS J094932.37+440801.9 G 09 49 32.37840 +44 08 01.9968           ~ 1 0
18 NGC 3008 LIN 09 49 34.2592534320 +44 06 09.706622940   15.4       ~ 17 0
19 NGC 3009 GiG 09 50 11.1247559952 +44 17 42.129497076   14.5       ~ 37 0
20 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6316 0
21 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1256 1

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2022.09.26-13:57:44

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