SIMBAD references

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

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


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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