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.…
| Author details: | Lida OskinovaORCiDGND, A. Bik, J. M. Mas-Hesse, M. Hayes, A. Adamo, Göran ÖstlinGND, F. Fürst, H. Otí-Floranes |
|---|---|
| DOI: | https://doi.org/10.1051/0004-6361/201935414 |
| ISSN: | 1432-0746 |
| Title of parent work (English): | Astronomy and astrophysics : an international weekly journal |
| Subtitle (English): | an intermediate-mass black hole candidate and the population of ULXs in the low-metallicity starburst galaxy ESO338-4 |
| Publisher: | EDP Sciences |
| Place of publishing: | Les Ulis |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2019/07/01 |
| Publication year: | 2019 |
| Release date: | 2021/01/19 |
| Tag: | X-rays: ISM; X-rays: binaries; galaxies: dwarf; galaxies: individual: ESO 338-4 |
| Volume: | 627 |
| Number of pages: | 7 |
| Funding 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) |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
| Peer review: | Referiert |
| Publishing method: | Open Access / Green Open-Access |
