NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-24 T12:57:35 PDT
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For refcode 2018AJ....155...17C:
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Copyright by American Astronomical Society. Reproduced by permission
2018AJ....155...17C Infrared Photometric Study of Wolf--Rayet Galaxies Chen, P. S.; Yang, X. H.; Liu, J. Y.; Shan, H. G. Abstract. We collected observational data on 781 Wolf--Rayet (WR) galaxies from the literature to photometrically study their infrared properties measured by the 2MASS, WISE, IRAS, AKARI, and Herschel missions. It is found that in the 1--5 micron range the radiations of WR galaxies are dominated by the free--free emissions from the stellar winds and the circumstellar dust from the late-type stars in the host galaxy. In the 5--22 micron range, the radiation of WR galaxies is dominated by the free--free emissions and the synchrotron radiation from the central active galactic nucleus (AGN; but not always present). In the 22--140 micron range, the radiations of WR galaxies are dominated by the free--free emissions and the star formation/starburst activities. In the 250--500 micron range, the radiation of WR galaxies is dominated by the free--free emissions. In addition, the comparison with the non-WR galaxies is made. It is shown that some star formation WR galaxies have redder near-infrared colors than non-WR star-forming galaxies probably due to the gas emission in the near-infrared. In the 2--5 micron region WR galaxies have redder colors due to the thermal emission from circumstellar dust of late-type stars and the enhanced gas emission. In the 5--22 micron region, both WR galaxies and non-WR galaxies have similar behavior, indicative of having similar free--free emission as the dominant radiation. In the 25--140 micron region, both types of galaxies also have similar behavior, indicative of having free--free emission from the stellar winds or the thermal radiation from the starburst/star formation as the dominant radiation. Key words: galaxies: photometry, infrared: galaxies
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