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New H i observations of KK 69. Is KK 69 a dwarf galaxy in transition?
- Source :
- CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- We present new HI data of the dwarf galaxy KK 69, obtained with the Giant Metrewave Radio Telescope (GMRT) with a signal-to-noise ratio that 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 HI gas. We found that 30% of the total HI gas, which corresponds to a mass of approx. 10^7 Mo, is in the CNM phase. The distribution of the HI in KK 69 is not symmetric. Our GMRT HI intensity map of KK 69 overlaid onto a Hubble Space Telescope image reveals an offset of approx. 4 kpc between the HI high-density region and the stellar body, indicating it may be a dwarf transitional galaxy. The offset, along with the potential truncation of the HI body, are evidence of interaction with the central group spiral galaxy NGC 2683, indicating the HI gas is being stripped from KK 69. Additionally, we detected extended HI 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 HI disk.<br />13 pages, 7 figures, accepted for publication in: Astrophysics and Space Science
- Subjects :
- Physics
Giant Metrewave Radio Telescope
Spiral galaxy
Ciencias Físicas
FOS: Physical sciences
Astronomy and Astrophysics
purl.org/becyt/ford/1.3 [https]
interactions [Galaxies]
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Astrophysics - Astrophysics of Galaxies
01 natural sciences
Galaxy
Cosmology
purl.org/becyt/ford/1 [https]
Astronomía
galaxies [Radio lines]
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Hubble space telescope
0103 physical sciences
010303 astronomy & astrophysics
CIENCIAS NATURALES Y EXACTAS
Astrophysics::Galaxy Astrophysics
Dwarf galaxy
Subjects
Details
- ISSN :
- 1572946X and 0004640X
- Volume :
- 365
- Database :
- OpenAIRE
- Journal :
- Astrophysics and Space Science
- Accession number :
- edsair.doi.dedup.....122b5a60779dbc64165494000217a890