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- Title
Properties of Primitive Galaxies.
- Authors
Heap, Sara R.; Hubeny, I.; Bouret, J.-C.; Lanz, T.; Brinchmann, J.
- Abstract
We report on a study of 9 nearby primitive galaxies observed by Hubble's COS far-UV spectrograph that can serve as templates of high-z galaxies to be observed by JWST. By "primitive galaxies," we mean galaxies having a low stellar mass, and low gas metallicity, , whether they are local or at high redshift. We find that far-UV spectra of these galaxies show evidence of hard radiation, including X-rays. Following Thuan et al. (2004), we identify these galaxies as massive X-ray binaries containing a massive accreting stellar black hole. We further find that the lower the metallicity, the higher the probability of extremely strong X-radiation. Following Heger et al. (2003), we suggest that the accreting black hold is produced by direct collapse of stars having initial masses greater than 50. The X-radiation produced by black hole disk directly affects the surrounding interstellar medium, and many of these effects are observable in far-UV spectra.
- Subjects
STELLAR black holes; INTERSTELLAR medium; X-ray binaries; GRAVITATIONAL collapse; DWARF galaxies
- Publication
Proceedings of the International Astronomical Union, 2022, Vol 18, Issue S361, p485
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S1743921322003246