A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2

Sathyaprakash, R.; Roberts, T.P.; Grisé, F.; Kaaret, P.; Ambrosi, E.; Done, C.; Gladstone, J.C.; Kajava, J.J.E.; Soria, R.; Zampieri, L.

doi:10.1093/mnras/stac402

All Outputs (4)

Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1 (2022)
Journal Article
Barra, F., Pinto, C., Walton, D., Kosec, P., D’Aì, A., Di Salvo, T., Del Santo, M., Earnshaw, H., Fabian, A., Fuerst, F., Marino, A., Pintore, F., Robba, A., & Roberts, T. (2022). Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1. Monthly Notices of the Royal Astronomical Society, 516(3), 3972-3983. https://doi.org/10.1093/mnras/stac2453

Ultraluminous X-ray sources (ULXs) are the most extreme among X-ray binaries in which the compact object, a neutron star or a black hole, accretes matter from the companion star, and exceeds a luminosity of 1039 ergs−1 in the X-ray energy band alone.... Read More about Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1.

The variability behavior of NGC 925 ULX-3 (2022)
Journal Article
Earnshaw, H. P., Brightman, M., Harrison, F. A., Heida, M., Jaodand, A., Middleton, M. J., Roberts, T. P., & Walton, D. J. (2022). The variability behavior of NGC 925 ULX-3. Astrophysical Journal, 934(1), Article 42. https://doi.org/10.3847/1538-4357/ac79b0

We report the results of a 2019-2021 monitoring campaign with Swift and associated target-of-opportunity observations with XMM-Newton and NuSTAR, examining the spectral and timing behavior of the highly variable ultraluminous X-ray source (ULX) NGC 9... Read More about The variability behavior of NGC 925 ULX-3.

A transient ultraluminous X-ray source in NGC 55 (2022)
Journal Article
Robba, A., Pinto, C., Pintore, F., Rodriguez, G., Ambrosi, E., Barra, F., Cusumano, G., D’Aì, A., Del Santo, M., Kosec, P., Marino, A., Middleton, M., Roberts, T., Salvaggio, C., Soria, R., Wolter, A., & Walton, D. (2022). A transient ultraluminous X-ray source in NGC 55. Monthly Notices of the Royal Astronomical Society, 515(4), 4669-4674. https://doi.org/10.1093/mnras/stac2018

Ultraluminous X-ray sources (ULXs) are a class of accreting compact objects with X-ray luminosities above 1039 erg s−1. The average number of ULXs per galaxy is still not well constrained, especially given the uncertainty on the fraction of ULX trans... Read More about A transient ultraluminous X-ray source in NGC 55.

A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2 (2022)
Journal Article
Sathyaprakash, R., Roberts, T., Grisé, F., Kaaret, P., Ambrosi, E., Done, C., Gladstone, J., Kajava, J., Soria, R., & Zampieri, L. (2022). A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2. Monthly Notices of the Royal Astronomical Society, 511(4), 5346-5362. https://doi.org/10.1093/mnras/stac402

NGC 1313 X-2 is one of the few known pulsating ultraluminous X-ray sources (PULXs), and so is thought to contain a neutron star that accretes at highly super-Eddington rates. However, the physics of this accretion remains to be determined. Here, we r... Read More about A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2.