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- Title
New H i observations of KK 69. Is KK 69 a dwarf galaxy in transition?
- Authors
Saponara, J.; Koribalski, B. S.; Patra, N. N.; Benaglia, P.
- Abstract
We present new H i data of the dwarf galaxy KK 69, obtained with the Giant Metrewave Radio Telescope (GMRT) with a signal-to-noise ratio almost double previous observations. We carried out a Gaussian spectral decomposition and stacking methods to identify the cold neutral medium (CNM) and the warm neutral medium (WNM) of the H i gas. We found that 30% of the total H i gas, which corresponds to a mass of ∼107 M⊙, is in the CNM phase. The distribution of the H i in KK 69 is not symmetric. Our GMRT H i intensity map of KK 69 overlaid onto a Hubble Space Telescope image reveals an offset of ∼4 kpc between the H i high-density region and the stellar body, indicating it may be a dwarf transitional galaxy. The offset, along with the potential truncation of the H i body, are evidence of interaction with the central group spiral galaxy NGC 2683, indicating the H i gas is being stripped from KK 69. Additionally, we detected extended H i emission of a dwarf galaxy member of the group as well as a possible new galaxy located near the north-eastern part of the NGC 2683 H i disk.
- Subjects
HUBBLE Space Telescope (Spacecraft); GALAXY clusters; RADIO telescopes; SPACE telescopes; DECOMPOSITION method; SIGNAL-to-noise ratio; DWARF galaxies
- Publication
Astrophysics & Space Science, 2020, Vol 365, Issue 7, pN.PAG
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-020-03825-2