2019A&A...627A..63O


Query : 2019A&A...627A..63O

2019A&A...627A..63O - Astronomy and Astrophysics, volume 627A, 63-63 (2019/7-1)

ULX contribution to stellar feedback: an intermediate-mass black hole candidate and the population of ULXs in the low-metallicity starburst galaxy ESO 338-4.

OSKINOVA L.M., BIK A., MAS-HESSE J.M., HAYES M., ADAMO A., OSTLIN G., FURST F. and OTI-FLORANES H.

Abstract (from CDS):

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 <40Myr 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 1040erg/s. We speculate that ESO 338-4 X-1 is powered by accretion on an intermediate-mass (≥300M) black hole. We show that X-ray radiation from ULXs and hot superbubbles strongly contributes to HeII ionization and general stellar feedback in this template starburst galaxy.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: dwarf - galaxies: individual: ESO 338-4 - X-rays: binaries - X-rays: ISM

Nomenclature: Fig. 3, Table2: [OBM2019] ESO 338-4 XN (Nos X1-X3).

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 ESO 243-49 GiG 01 10 27.7550638752 -46 04 27.356310264 16.54 14.92   13.48   ~ 171 0
2 NAME M82 ULX-1 UX? 09 55 50.01 +69 40 46.0           ~ 267 1
3 [OBR98] Inner82 GlC 19 27 58.085 -41 34 31.49           ~ 1 0
4 [OBM2019] ESO 338-4 X3 ULX 19 27 58.13 -41 34 31.4           ~ 1 0
5 [OBR98] Inner78 GlC 19 27 58.153 -41 34 31.12           ~ 1 0
6 [OBR98] Inner85 GlC 19 27 58.286 -41 34 31.53           ~ 1 0
7 [OBM2019] ESO 338-4 X2 ULX 19 27 58.30 -41 34 31.5           ~ 1 0
8 [OBR98] Inner86 GlC 19 27 58.308 -41 34 31.72           ~ 1 0
9 ESO 338-4 IG 19 27 58.338 -41 34 30.81   13.55 13.21 13.14 13.43 ~ 229 1
10 [OBM2019] ESO 338-4 X1 ULX 19 27 58.54 -41 34 32.4           ~ 1 0
11 [OBR98] Inner46 GlC 19 27 58.560 -41 34 32.25           ~ 1 0
12 3XMM J192758.7-413430 X 19 27 58.7 -41 34 30           ~ 1 0
13 [OBR98] Inner23 GlC ~ ~           ~ 14 0

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2023.09.28-17:45:43

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