Can I read Monitoring Observations of SMC X-1's Excursions (MOOSE) III: X-ray Spectroscopy of a Warped, Precessing Accretion Disc on EtoBox?

Monitoring Observations of SMC X-1's Excursions (MOOSE) III: X-ray Spectroscopy of a Warped, Precessing Accretion Disc by Karam, Rawan; Dage, Kristen C.; Tetarenko, Bailey E.; Brumback, McKinley C.; Haggard, Daryl; Bahramian, Arash; Hu, Chin-Ping; Neilsen, Joey; Altamirano, Diego; Athukoralalage, Wasundara; Charles, Philip A.; Clarkson, William I.; Hickox, Ryan C.; Kennea, Jamie is a scholarly article available to read on EtoBox.

What is Monitoring Observations of SMC X-1's Excursions (MOOSE) III: X-ray Spectroscopy of a Warped, Precessing Accretion Disc about?

The MOOSE (Monitoring Observations of SMC X-1 Excursions) program uses the Neutron Star Interior Composition Explorer Mission (NICER) to monitor the high mass X-ray binary SMC X-1 during its superorbital period excursions. Here we perform X-ray spectral analyses of 26 NICER observations of SMC X-1, taken at the tail-end of the excursion between 2021-04-01 and 2022-01-05. We use a single spectral model to fit spectra observed in high, intermediate and low states, using a combination of a partial covering fraction model, a black-body disc, and a power-law component. We find that the partial covering fraction varies significantly with the superorbital state during superorbital excursion. Our findings suggest that the low/high state in SMC X-1 is caused by a very high obscuration of the accretion disk.

Author

Karam, Rawan; Dage, Kristen C.; Tetarenko, Bailey E.; Brumback, McKinley C.; Haggard, Daryl; Bahramian, Arash; Hu, Chin-Ping; Neilsen, Joey; Altamirano, Diego; Athukoralalage, Wasundara; Charles, Philip A.; Clarkson, William I.; Hickox, Ryan C.; Kennea, Jamie

Published

2024

Language

EN