SIMBAD references

2016ApJ...822...60P - Astrophys. J., 822, 60-60 (2016/May-2)

X-ray spectral analysis of the steady states of GRS1915+105.

PERIS C.S., REMILLARD R.A., STEINER J.F., VRTILEK S.D., VARNIERE P., RODRIGUEZ J. and POOLEY G.

Abstract (from CDS):

We report on the X-ray spectral behavior within the steady states of GRS1915+105. Our work is based on the full data set of the source obtained using the Proportional Counter Array (PCA) on the Rossi X-ray Timing Explorer (RXTE) and 15 GHz radio data obtained using the Ryle Telescope. The steady observations within the X-ray data set naturally separated into two regions in the color-color diagram and we refer to these regions as steady-soft and steady-hard. GRS1915+105 displays significant curvature in the coronal component in both the soft and hard data within the RXTE/PCA bandpass. A majority of the steady-soft observations displays a roughly constant inner disk radius ( {R}_{∈} ), while the steady-hard observations display an evolving disk truncation which is correlated to the mass accretion rate through the disk. The disk flux and coronal flux are strongly correlated in steady-hard observations and very weakly correlated in the steady-soft observations. Within the steady-hard observations, we observe two particular circumstances when there are correlations between the coronal X-ray flux and the radio flux with log slopes η∼0.68±0.35 and η∼1.12±0.13 . They are consistent with the upper and lower tracks of Gallo et al. (2012), respectively. A comparison of the model parameters to the state definitions shows that almost all of the steady-soft observations match the criteria of either a thermal or steep power-law state, while a large portion of the steady-hard observations match the hard-state criteria when the disk fraction constraint is neglected.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - binaries: close - black hole physics - magnetic fields - X-rays: binaries - X-rays: individual: GRS1915+105

VizieR on-line data: <Available at CDS (J/ApJ/822/60): table2.dat>

Simbad objects: 17

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2021.06.21-16:06:28

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