MCG+07-20-052: Interacting Dwarf Pair in a Group Environment
Paudel, Sanjaya1,2; Sengupta, Chandreyee3; Yoon, Suk-Jin1,2; Chhatkuli, Daya Nidhi4
Corresponding AuthorYoon, Suk-Jin(
AbstractWe 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.
KeywordDraco dwarf galaxy Interacting galaxies Star formation Hi line emission
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000518996100001
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Document Type期刊论文
Corresponding AuthorYoon, Suk-Jin
Affiliation1.Yonsei Univ, Dept Astron, Seoul 03722, South Korea
2.Yonsei Univ, Ctr Galaxy Evolut Res, Seoul 03722, South Korea
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Peoples R China
4.Tribhuvan Univ, Cent Dept Phys, Kathmandu, Nepal
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GB/T 7714
Paudel, Sanjaya,Sengupta, Chandreyee,Yoon, Suk-Jin,et al. MCG+07-20-052: Interacting Dwarf Pair in a Group Environment[J]. ASTRONOMICAL JOURNAL,2020,159(4):9.
APA Paudel, Sanjaya,Sengupta, Chandreyee,Yoon, Suk-Jin,&Chhatkuli, Daya Nidhi.(2020).MCG+07-20-052: Interacting Dwarf Pair in a Group Environment.ASTRONOMICAL JOURNAL,159(4),9.
MLA Paudel, Sanjaya,et al."MCG+07-20-052: Interacting Dwarf Pair in a Group Environment".ASTRONOMICAL JOURNAL 159.4(2020):9.
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