The galactic supersoft X-ray binary RX J0925.7-4758 (MR Velorum)

P. C. Schmidtke; A. P. Cowley; V. A. Taylor; David Crampton; J. B. Hutchings

doi:10.1086/301482

The galactic supersoft X-ray binary RX J0925.7-4758 (MR Velorum)

P. C. Schmidtke, A. P. Cowley, V. A. Taylor, David Crampton, J. B. Hutchings

Penn State Wilkes-Barre

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12 Scopus citations

Abstract

New simultaneous photometric and spectroscopic observations of the supersoft X-ray binary RX J0925.7-4758 (MR Vel) have been obtained. These confirm the unusually long orbital period near 3.8 days. An accurate period is determined based on several years of photometric observations. Short-term photometric variability (∼0.25 days) is also present, but it does not appear to be strictly periodic. The spectroscopic behavior reveals large-amplitude He II and H velocity curves, indicating that the system is viewed from a moderately high inclination angle. Masses for the component stars are derived. Evidence of a high-velocity jet (outflow velocity of 5350 km s^-1) is present at Hα. Its radial velocity curve is very similar to the disk emission lines, suggesting the jet is formed near the compact star. A new model for the system is presented.

Original language	English (US)
Pages (from-to)	935-942
Number of pages	8
Journal	Astronomical Journal
Volume	120
Issue number	2
DOIs	https://doi.org/10.1086/301482
State	Published - Aug 2000

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/301482

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title = "The galactic supersoft X-ray binary RX J0925.7-4758 (MR Velorum)",

abstract = "New simultaneous photometric and spectroscopic observations of the supersoft X-ray binary RX J0925.7-4758 (MR Vel) have been obtained. These confirm the unusually long orbital period near 3.8 days. An accurate period is determined based on several years of photometric observations. Short-term photometric variability (∼0.25 days) is also present, but it does not appear to be strictly periodic. The spectroscopic behavior reveals large-amplitude He II and H velocity curves, indicating that the system is viewed from a moderately high inclination angle. Masses for the component stars are derived. Evidence of a high-velocity jet (outflow velocity of 5350 km s-1) is present at Hα. Its radial velocity curve is very similar to the disk emission lines, suggesting the jet is formed near the compact star. A new model for the system is presented.",

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T1 - The galactic supersoft X-ray binary RX J0925.7-4758 (MR Velorum)

AU - Schmidtke, P. C.

AU - Cowley, A. P.

AU - Taylor, V. A.

AU - Crampton, David

AU - Hutchings, J. B.

PY - 2000/8

Y1 - 2000/8

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AB - New simultaneous photometric and spectroscopic observations of the supersoft X-ray binary RX J0925.7-4758 (MR Vel) have been obtained. These confirm the unusually long orbital period near 3.8 days. An accurate period is determined based on several years of photometric observations. Short-term photometric variability (∼0.25 days) is also present, but it does not appear to be strictly periodic. The spectroscopic behavior reveals large-amplitude He II and H velocity curves, indicating that the system is viewed from a moderately high inclination angle. Masses for the component stars are derived. Evidence of a high-velocity jet (outflow velocity of 5350 km s-1) is present at Hα. Its radial velocity curve is very similar to the disk emission lines, suggesting the jet is formed near the compact star. A new model for the system is presented.

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The galactic supersoft X-ray binary RX J0925.7-4758 (MR Velorum)

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