Narrowband H imaging of nearby Wolf-Rayet galaxies
arXiv:1910.03815 · doi:10.1093/mnras/stz2833
Abstract
We present narrowband H imaging of nearby Wolf-Rayet (WR) galaxies known as a subset of starburst galaxies. The H images have been used to show morphology of star-forming regions in galaxies, which leads to speculate that the studied galaxies have most likely experienced merger or interaction with low luminous dwarf galaxies or \HI clouds. We further derive the H based star formation rates (SFRs) in galaxies using our H observations. These SFRs are well-correlated with SFRs derived using other indicators at far-ultraviolet, far-infrared and 1.4-GHz radio wavebands. It is noticed that the infrared excess (IRX) method gives the best SFR estimates, consistent with different models predication. These models also predict that the sample galaxies have probably gone through a continuous star formation at least for 1 Gyr over which the recent (< 10 Myr) star formation has taken place in WR phase. This study presents Main-Sequence (MS) relation for nearby WR galaxies for the first time. This derived MS relation is found to be similar to previously known MS relation for normal nearby star-forming galaxies, suggesting that WR systems evolve in a similar fashion as normal star-forming galaxies evolve.
arXiv comment6 pages, 4 figures, Accepted for publication in MNRAS
References in corpus (21)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
- Star Formation in Galaxies Along the Hubble Sequence
- Starburst99: Synthesis Models for Galaxies with Active Star Formation
- The physical properties of star forming galaxies in the low redshift universe
- UV Star Formation Rates in the Local Universe
- The Star Formation History of Field Galaxies
- The Calibration of Mid-Infrared Star Formation Rate Indicators
- Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
- Calibrating Extinction-Free Star Formation Rate Diagnostics with 33GHz Free-Free Emission in NGC6946
- Dust-Corrected Star Formation Rates of Galaxies. II. Combinations of Ultraviolet and Infrared Tracers
- Galactic-Field IMFs of Massive Stars
- Stellar evolution with rotation XI: Wolf-Rayet star populations at different metallicities
- Galaxies with Wolf-Rayet signatures in the low-redshift Universe - A survey using the Sloan Digital Sky Survey
- Identifying Galaxy Mergers in Observations and Simulations with Deep Learning
- The intriguing HI gas in NGC 5253: an infall of a diffuse, low-metallicity HI cloud?
- Massive star formation in Wolf-Rayet galaxies. V: Star formation rates, masses and the importance of galaxy interactions
- Analysis of the SFR - M* plane at z<3: single fitting versus multi-Gaussian decomposition
- Leo P: How Many Metals can a Very Low-Mass, Isolated Galaxy Retain?
- Photometric and spectroscopic studies of star-forming regions within Wolf-Rayet galaxies
- Halpha imaging survey of Wolf-Rayet galaxies: morphologies and star formation rates