Insights on bar quenching from a multiwavelength analysis: The case of Messier 95
- Title
- Insights on bar quenching from a multiwavelength analysis: The case of Messier 95
- Creator
- George K.; Joseph P.; Mondal C.; Subramanian S.; Subramaniam A.; Paul K.T.
- Description
- The physical processes related to the eect of bars in the quenching of star formation in the region between the nuclear/central subkiloparsec region and the ends of the bar (bar region) of spiral galaxies is not fully understood. It is hypothesized that the bar can either stabilize the gas against collapse, inhibiting star formation, or eciently consume all the available gas, leaving no fuel for further star formation.We present a multiwavelength study using the archival data of an early-type barred spiral galaxy, Messier 95, which shows signatures of suppressed star formation in the bar region. Using optical, ultraviolet (UV), infrared, CO, and HI imaging data we study the pattern of star formation progression and stellar/gas distribution, and try to provide insights into the process responsible for the observed pattern. The FUV NUV pixel colour map reveals a cavity devoid of UV flux in the bar region that matches the length of the bar, which is 4.2 kpc. The central nuclear region of the galaxy shows a blue colour clump and along the major axis of the stellar bar the colour progressively becomes redder. Based on a comparison to single stellar population models, we show that the region of galaxy along the major axis of the bar, unlike the region outside the bar, is comprised of stellar populations with ages 350 Myr; there is a star-forming clump in the centre of younger ages of 150 Myr. Interestingly the bar region is also devoid of neutral and molecular hydrogen but has an abundant molecular hydrogen present at the nuclear region of the galaxy. Our results are consistent with a picture in which the stellar bar in Messier 95 is redistributing the gas by funnelling gas inflows to nuclear region, thus making the bar region devoid of fuel for star formation. ESO 2019.
- Source
- Astronomy and Astrophysics, Vol-621
- Date
- 2019-01-01
- Publisher
- EDP Sciences
- Subject
- Galaxies: evolution; Galaxies: formation; Galaxies: individual: Messier 95; Galaxies: star formation; Ultraviolet: galaxies
- Coverage
- George K., Department of Physics, Christ University, Bangalore, India; Joseph P., Department of Physics, Christ University, Bangalore, India, Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Mondal C., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Subramanian S., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Subramaniam A., Indian Institute of Astrophysics, Koramangala II Block, Bangalore, India; Paul K.T., Department of Physics, Christ University, Bangalore, India
- Rights
- All Open Access; Bronze Open Access; Green Open Access
- Relation
- ISSN: 46361; CODEN: AAEJA
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
George K.; Joseph P.; Mondal C.; Subramanian S.; Subramaniam A.; Paul K.T., “Insights on bar quenching from a multiwavelength analysis: The case of Messier 95,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 23, 2025, https://archives.christuniversity.in/items/show/16796.