IIA Institutional Repository

A comparative study of star-forming dwarf galaxies using the UVIT

Show simple item record

dc.contributor.author Amrutha, S
dc.contributor.author Mousumi Das
dc.contributor.author Yadav, Jyoti
dc.date.accessioned 2024-06-21T04:06:03Z
dc.date.available 2024-06-21T04:06:03Z
dc.date.issued 2024-05
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 530, No. 2, pp. 2199–2231 en_US
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/2248/8482
dc.description Open Access. en_US
dc.description This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.description.abstract We present a far-ultraviolet (FUV) study of 16 star-forming dwarf galaxies (SFDGs) using the Ultra Violet Imaging Telescope. Morphologically, SFDGs are classified as dwarf spirals, dwarf irregulars, and blue compact dwarfs (BCDs). We extracted the star-forming complexes (SFCs) from the sample galaxies, derived their sizes, and estimated the FUV + 24 μm star-formation rates (SFRs). We also determined the approximate stellar disc mass associated with the SFCs using Infrared Array Camera 3.6 micron images. We derived the specific SFRs (sSFRs), as well as the SFR densities [Σ(SFR)] for the SFCs. We find that the lower Σ(SFR) for each type is different, with the dwarf irregulars having the lowest Σ(SFR) compared with others. However, the median size of the SFCs in the dwarf irregulars is the largest compared with the other two types when compared at roughly the same distance. We have derived the star-forming main sequence (SFMS) on the scale of SFCs for all three classes of SFDGs. We find that although all SFDGs approximately follow the global SFMS relation, i.e. SFR ∝ M*α (where globally α ≈ 1 for low-surface brightness galaxies and 0.9 for SFDGs), on the scale of SFCs the α value for each type is different. The α values for dwarf spirals, dwarf irregulars, and BCDs are found to be 0.74 ± 0.13, 0.87 ± 0.16, and 0.80 ± 0.19, respectively. However, the age of all SFCs approximately corresponds to 1 Gyr. Finally, we find that the outer SFCs in most galaxies except BCDs have a high sSFR, supporting the inside-out model of galaxy growth. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of Royal Astronomical Society en_US
dc.relation.uri https://doi.org/10.1093/mnras/stae907
dc.rights © 2024 The Author(s).
dc.subject Galaxies: dwarf en_US
dc.subject Galaxies: star formation en_US
dc.subject Ultraviolet: galaxies en_US
dc.title A comparative study of star-forming dwarf galaxies using the UVIT en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account