A broadband X-ray view of the ultraluminous sources in the galaxies ESO 501–023 and IC 5052
Year: 2024
Type: article
Abstract: We report the results obtained from the analysis of XMM-Newton and NuSTAR observations of two ultraluminous X-ray sources (ULXs) located in the galaxies ESO 501–023 and IC 5052. To better understand their nature, we studied the spectral and timing behavior of these sources. We used spectral-timing techniques to investigate the presence of possible pulsations in the data. We did not detect any significant pulsations and set upper limits on the pulsed fraction of < 9% for ESO 501–023 ULX and < 11% for IC 5052 X-1. These sources exhibit typical ULX X-ray spectra and can be well fitted with two thermal components plus a Comptonization tail at high energies. To classify the sources, we compared their spectral parameters with those of other well-known ULXs. Our results show that ESO 501–023 ULX is in the broadened disk state and IC 5052 X-1 is in the hard ultraluminous state. Finally, our results suggest that the sources are likely nonmagnetic, supercritically accreting objects fed by companion stars.
Source: Astronomy and Astrophysics
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,732
Awards: G1092424111, G1175115578, G1855990336, G2139278776, G2204433269, G2262748287, G2309174360, G2601397997, G2673512141, G300979063, G3470076519, G3480869486, G3518538256, G3681454997, G3690828678, G3780874795, G3875147624, G4042783231, G410571670, G425668148, G4294200505, G430777504, G4317403835, G451917667, G4552759544, G4850644055, G5080475149, G5421974903, G5845768719, G5852345970, G5883285439, G5915139351, G5967599077, G6208161563, G6400464229, G7434936867, G7814516081, G7867890770, G817261669, G8278124175, G8684520763, G8920660035, G966035586, G99296377
OpenAlex ID: W4405131797