2003A&A...399.1151M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST22:39:25

2003A&A...399.1151M - Astronomy and Astrophysics, volume 399, 1151-1157 (2003/3-1)

Spectral fits to the 1999 Aql X-1 outburst data.

MACCARONE T.J. and COPPI P.S.

Abstract (from CDS):

We present analysis and spectral fits of the RXTE data from the May/June 1999 outburst of Aql X-1. These data include observations in the rising portion of the hard state, in the soft state, and in the falling portion of the hard state. We show that the data can be fit by a purely thermal Comptonization model for all the observations, but that more complicated models cannot be ruled out. Up to 60% of the corona's power in the soft state may be injected into non-thermal electrons. The soft state data show approximately constant optical depth and coronal temperatures over a range of ∼10 in luminosity, while they show evidence for a reduction of seed photon temperature with reduced luminosity and indicate that the characteristic size of the seed photon emitting region is roughly constant throughout the soft state. The hard state before the soft state shows a higher luminosity, higher optical depth, and lower electron temperature than the hard state after the soft state. We find a reduction of the hard (30-60keV) X-ray flux during a type I burst and show that it requires a total corona energy reservoir of less than ∼1038ergs.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - radiation mechanisms: non-thermal - X-rays: individual: Aql X-1 - X-rays: bursts

Simbad objects: 5

goto Full paper

goto View the reference in ADS

Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1062 0
2 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1751 1
3 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1826 0
4 V* V1101 Sco LXB 17 05 44.4915929414 -36 25 23.049863107   20.10 18.6     ~ 414 0
5 X Aql X-1 LXB 19 11 16.0572031521 +00 35 05.876658556           ~ 1040 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2003A&A...399.1151M and select 'bookmark this link' or equivalent in the popup menu


2021.04.18-22:39:25

© Université de Strasbourg/CNRS

    • Contact