Probing star formation in five of the most massive spiral galaxies observed through ASTROSAT UltraViolet Imaging Telescope
- Title
- Probing star formation in five of the most massive spiral galaxies observed through ASTROSAT UltraViolet Imaging Telescope
- Creator
- Ray S.; Dhiwar S.; Bagchi J.; Pandge M.B.
- Description
- We present highly resolved and sensitive imaging of the five nearby massive spiral galaxies (with rotation velocities > 300 km s?1) observed by the UltraViolet Imaging Telescope onboard Indias multiwavelength astronomy satellite ASTROSAT, along with other archival observations. These massive spirals show a far-ultraviolet star formation rate in the range of ? 1.4 13.7 M? yr?1 and fall in the Green Valley region with a specific star formation rate within ? 10?11.5 10?10.5 yr?1. Moreover, the mean star formation rate density of the highly resolved star-forming clumps of these objects is in the range 0.011 0.098 M? yr?1 kpc?2, signifying localized star formation. From the spectral energy distributions, under the assumption of a delayed star formation model, we show that the star formation of these objects had peaked in the period of ? 0.8 2.8 Gyr after the Big Bang and the object that has experienced the peak sooner after the Big Bang show relatively less star-forming activity at z ? 0 and falls below the main-sequence relation for a stellar content of ? 1011 M?. We also show that these objects accumulated much of their stellar mass in the early period of evolution with ? 31 42 per cent of the total stellar mass obtained in a time of (1/16) (1/5)th the age of the Universe. We estimate that these massive objects convert their halo baryons into stars with efficiencies falling between ? 7 and 31 per cent. 2024 Oxford University Press. All rights reserved.
- Source
- Monthly Notices of the Royal Astronomical Society, Vol-527, No. 4, pp. 9999-10015.
- Date
- 2024-01-01
- Publisher
- Oxford University Press
- Subject
- galaxies: individual: NGC 1030, NGC 1961, NGC 4501, NGC 5635, NGC 266; galaxies: ISM; galaxies: spiral; Galaxy: formation; Galaxy: fundamental parameters
- Coverage
- Ray S., Department of Physics and Electronics, Christ University, Hosur Road, Bengaluru, 560029, India, Department of Physics and Electronics, Dayanand Science College, Latur, 413512, India; Dhiwar S., Inter-University Centre for Astronomy and Astrophysics, Pune, 411007, India, Department of Physics, Savitribai Phule Pune University, Pune, 411007, India; Bagchi J., Department of Physics and Electronics, Christ University, Hosur Road, Bengaluru, 560029, India; Pandge M.B., Department of Physics and Electronics, Dayanand Science College, Latur, 413512, India
- Rights
- All Open Access; Hybrid Gold Open Access
- Relation
- ISSN: 358711; CODEN: MNRAA
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Ray S.; Dhiwar S.; Bagchi J.; Pandge M.B., “Probing star formation in five of the most massive spiral galaxies observed through ASTROSAT UltraViolet Imaging Telescope,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 25, 2025, https://archives.christuniversity.in/items/show/13338.