UVIT view of NGC 5291: Ongoing star formation in tidal dwarf galaxies at ? 0.35 kpc resolution
- Title
- UVIT view of NGC 5291: Ongoing star formation in tidal dwarf galaxies at ? 0.35 kpc resolution
- Creator
- Rakhi R.; Santhosh G.; Joseph P.; George K.; Subramanian S.; Kavila I.; Postma J.; Duc P.-A.; CP.; Cortese L.; Ghosh S.K.; Subramaniam A.; Tandon S.; Hutchings J.; Wesley P.S.; Bharadwaj A.; Niroula N.
- Description
- NGC 5291, an early-type galaxy surrounded by a giant H I ring, is believed to be formed from collision with another galaxy. Several star forming complexes and tidal dwarf galaxies are distributed along the collisional ring which are sites of star formation in environments where extreme dynamical effects are involved. Dynamical effects can affect the star formation properties and the spatial distribution of star forming complexes along the tidal features. To study and quantify the star formation activity in the main body and in the ring structure of the NGC 5291 system, we use high spatial resolution FUV and NUV imaging observations from the Ultraviolet Imaging Telescope onboard AstroSat. A total of 57 star-forming knots are identified to be part of this interacting system out of which 12 are new detections (star forming complexes that lie inside the H I contour) compared to the previous measurements from lower resolution UV imaging. We estimate the attenuation in UV for each of the resolved star-forming knots using the UV spectral slope ?, derived from the FUV - NUV colour. Using the extinction corrected UV fluxes, we derive the star formation rate of the resolved star forming complexes. The extinction corrected total star formation rate of this system is estimated as 1.75 0.04 M? yr-1. The comparison with dwarf galaxy populations (BCD, Sm, and dIm galaxies) in the nearby Universe shows that many of the knots in the NGC 5291 system have SFR values comparable to the SFR of BCD galaxies. 2023 The Author(s).
- Source
- Monthly Notices of the Royal Astronomical Society, Vol-522, No. 1, pp. 1196-1207.
- Date
- 2023-01-01
- Publisher
- Oxford University Press
- Subject
- galaxies: dwarf; galaxies: formation; galaxies: interactions; galaxies: star formation; stars: formation; ultraviolet: galaxies
- Coverage
- Rakhi R., Department of Physics, NSS College, Pandalam Kerala, 689 501, India; Santhosh G., Department of Physics, NSS College, Pandalam Kerala, 689 501, India; Joseph P., Indian Institute of Astrophysics, Bangalore, 560034, India, Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; George K., Faculty of Physics, Ludwig-Maximilians-Universit, Scheinerstr. 1, Munich, D-81679, Germany; Subramanian S., Indian Institute of Astrophysics, Bangalore, 560034, India; Kavila I., School of Pure and Applied Physics, Mahatma Gandhi University, Kerala, Kottayam, 686560, India; Postma J., Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, T2N 1N4, AB, Canada; Duc P.-A., Universitde Strasbourg, CNRS, Observatoire astronomique de Strasbourg, UMR 7550, Strasbourg, F-67000, France; CP., Herzberg Astronomy and Astrophysics Research Centre, National Research Council of Canada, 5071 W. Saanich Road, Victoria, V9E 2E7, BC, Canada; Cortese L., International Centre for Radio Astronomy Research (ICRAR), University of Western Australia, Crawley, 6009, WA, Australia; Ghosh S.K., Tata Institute of Fundamental Research, Colaba, Mumbai, 400005, India; Subramaniam A., Indian Institute of Astrophysics, Bangalore, 560034, India; Tandon S., Inter-University Centre for Astronomy and Astrophysics, PostBag 4, Ganeshkhind, Pune, 411007, India; Hutchings J., Herzberg Astronomy and Astrophysics Research Centre, National Research Council of Canada, 5071 W. Saanich Road, Victoria, V9E 2E7, BC, Canada; Wesley P.S., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Bharadwaj A., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India; Niroula N., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, 560029, India
- Rights
- All Open Access; Green Open Access
- Relation
- ISSN: 358711; CODEN: MNRAA
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Rakhi R.; Santhosh G.; Joseph P.; George K.; Subramanian S.; Kavila I.; Postma J.; Duc P.-A.; CP.; Cortese L.; Ghosh S.K.; Subramaniam A.; Tandon S.; Hutchings J.; Wesley P.S.; Bharadwaj A.; Niroula N., “UVIT view of NGC 5291: Ongoing star formation in tidal dwarf galaxies at ? 0.35 kpc resolution,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/14172.