1998A&A...330..999S


Query : 1998A&A...330..999S

1998A&A...330..999S - Astronomy and Astrophysics, volume 330, 999-1004 (1998/2-3)

The LiI resonance line in the spectra of X-ray nova accretion discs.

SULEIMANOV V. and REBOLO R.

Abstract (from CDS):

We study the formation of the Li I λ 6708Å resonance doublet in spectra of X-ray novae during the stage of outburst decay. We discuss the general conditions on accretion disc parameters which allow the detection of any spectral line absorption component in spectra of self-irradiated accretion discs. We obtain a simple analytical formula to estimate the equivalent width of the lithium line in the spectra of these discs and, adopting a simple model of self-irradiation, we have conducted more precise numerical calculations of these equivalent widths in the spectra of accretion discs around Schwarzschild black holes. We find that the equivalent width of the Li I doublet can reach ∼20-100mÅ during outburst decay if the luminosity becomes less than 0.01 Eddington luminosity and if the lithium abundance in the discs is about cosmic (logN(Li)∼3). If some lithium production takes place in these discs higher abundances would be possible and consequently stronger lines could be formed. The larger the outer disc radius and the smaller the disc inclination angle to line of sight, the greater the equivalent width of the line.

Abstract Copyright:

Journal keyword(s): accretion discs - stars: abundances - novae - X-rays: stars

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* V518 Per HXB 04 21 42.7227473352 +32 54 26.939156184 13.00 13.50 13.2     M4.5V 635 1
2 1A 0620-00 HXB 06 22 44.5423857312 -00 20 44.290460544 10.60 11.40 11.2     K3V-K7V 1068 0
3 V* MM Vel HXB 10 13 36.4108035720 -45 04 32.553865524   14.84 14.71     G5V-M0V 189 0
4 V* GU Mus HXB 11 26 26.5961559600 -68 40 32.877752952           K3V-K7V 687 1
5 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4092 0
6 V* V404 Cyg HXB 20 24 03.8254458776 +33 52 01.962185735           G9/K0III/V 1174 0

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2022.05.28-19:42:40

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