ULX contribution to stellar feedback
- Context. X-ray radiation from accreting compact objects is an important part of stellar feedback. The metal-poor galaxy ESO 338-4 has experienced vigorous starburst during the last <40 Myr and contains some of the most massive super star clusters in the nearby Universe. Given its starburst age and its star-formation rate, ESO 338-4 is one of the most efficient nearby manufactures of neutron stars and black holes, hence providing an excellent laboratory for feedback studies. Aims. We aim to use X-ray observations with the largest modern X-ray telescopes XMM-Newton and Chandra to unveil the most luminous accreting neutron stars and black holes in ESO 338-4. Methods. We compared X-ray images and spectra with integral field spectroscopic observations in the optical to constrain the nature of strong X-ray emitters. Results. X-ray observations uncover three ultraluminous X-ray sources (ULXs) in ESO 338-4. The brightest among them, ESO 338 X-1, has X-ray luminosity in excess of 10(40) erg s(-1). We speculate that ESO 338-4 X-1 is powered byContext. X-ray radiation from accreting compact objects is an important part of stellar feedback. The metal-poor galaxy ESO 338-4 has experienced vigorous starburst during the last <40 Myr and contains some of the most massive super star clusters in the nearby Universe. Given its starburst age and its star-formation rate, ESO 338-4 is one of the most efficient nearby manufactures of neutron stars and black holes, hence providing an excellent laboratory for feedback studies. Aims. We aim to use X-ray observations with the largest modern X-ray telescopes XMM-Newton and Chandra to unveil the most luminous accreting neutron stars and black holes in ESO 338-4. Methods. We compared X-ray images and spectra with integral field spectroscopic observations in the optical to constrain the nature of strong X-ray emitters. Results. X-ray observations uncover three ultraluminous X-ray sources (ULXs) in ESO 338-4. The brightest among them, ESO 338 X-1, has X-ray luminosity in excess of 10(40) erg s(-1). We speculate that ESO 338-4 X-1 is powered by accretion on an intermediate-mass (greater than or similar to 300 M-circle dot)black hole. We show that X-ray radiation from ULXs and hot superbubbles strongly contributes to He II ionization and general stellar feedback in this template starburst galaxy.…
| Verfasserangaben: | Lida OskinovaORCiDGND, A. Bik, J. M. Mas-Hesse, M. Hayes, A. Adamo, Göran ÖstlinGND, F. Fürst, H. Otí-Floranes |
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| DOI: | https://doi.org/10.1051/0004-6361/201935414 |
| ISSN: | 1432-0746 |
| Titel des übergeordneten Werks (Englisch): | Astronomy and astrophysics : an international weekly journal |
| Untertitel (Englisch): | an intermediate-mass black hole candidate and the population of ULXs in the low-metallicity starburst galaxy ESO338-4 |
| Verlag: | EDP Sciences |
| Verlagsort: | Les Ulis |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Datum der Erstveröffentlichung: | 01.07.2019 |
| Erscheinungsjahr: | 2019 |
| Datum der Freischaltung: | 19.01.2021 |
| Freies Schlagwort / Tag: | X-rays: ISM; X-rays: binaries; galaxies: dwarf; galaxies: individual: ESO 338-4 |
| Band: | 627 |
| Seitenanzahl: | 7 |
| Fördernde Institution: | Deutsches Zentrum fur Luft und Raumfahrt (DLR)Helmholtz AssociationGerman Aerospace Centre (DLR) [FKZ 50 OR 1809]; Russian Government Program of Competitive Growth of Kazan Federal University; CAB) [ESP2017-87676-C5-1-R, MDM-2017-0737]; Swedish Research Council, VetenskapsradetSwedish Research Council; Swedish National Space Agency (SNSA) |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
| Peer Review: | Referiert |
| Publikationsweg: | Open Access / Green Open-Access |
