HI Studies of Extremely Metal Poor Dwarfs in Voids -- I
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910551263674368 |
|---|---|
| author | Kurapati, Sushma Pustilnik, Simon A. Egorova, Evgeniya S. |
| author_facet | Kurapati, Sushma Pustilnik, Simon A. Egorova, Evgeniya S. |
| contents | We present and discuss the results of the Giant Metrewave Radio Telescope (GMRT) HI 21-cm line mapping for five isolated low-mass (M_bary ~(2--8)*10^7 Mo) eXtremely Metal Poor (XMP) dwarfs [12+log(O/H)=7.13-7.28], selected from the Nearby Void Galaxy (NVG) sample. All the studied void dwarfs show the disturbed morphology in the HI maps with the angular resolutions of ~11" to ~40". We examine the HI morphology and velocity field and the relative orientation of their stellar and gas body spins. We discuss the overall non-equilibrium state of their gas and the possible origin and evolution of the studied void dwarfs. The most straightforward interpretation of the ubiquitous phenomenon of the gas component non-equilibrium state in these and similar void dwarfs is the cold accretion from the void filaments and/or minor mergers. The cold gas accretion in voids could be linked to the presence of small filaments that constitute the substructure of voids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_03599 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | HI Studies of Extremely Metal Poor Dwarfs in Voids -- I Kurapati, Sushma Pustilnik, Simon A. Egorova, Evgeniya S. Astrophysics of Galaxies We present and discuss the results of the Giant Metrewave Radio Telescope (GMRT) HI 21-cm line mapping for five isolated low-mass (M_bary ~(2--8)*10^7 Mo) eXtremely Metal Poor (XMP) dwarfs [12+log(O/H)=7.13-7.28], selected from the Nearby Void Galaxy (NVG) sample. All the studied void dwarfs show the disturbed morphology in the HI maps with the angular resolutions of ~11" to ~40". We examine the HI morphology and velocity field and the relative orientation of their stellar and gas body spins. We discuss the overall non-equilibrium state of their gas and the possible origin and evolution of the studied void dwarfs. The most straightforward interpretation of the ubiquitous phenomenon of the gas component non-equilibrium state in these and similar void dwarfs is the cold accretion from the void filaments and/or minor mergers. The cold gas accretion in voids could be linked to the presence of small filaments that constitute the substructure of voids. |
| title | HI Studies of Extremely Metal Poor Dwarfs in Voids -- I |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2312.03599 |