2013A&A...559A..87Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST14:54:48

2013A&A...559A..87Z - Astronomy and Astrophysics, volume 559A, 87-87 (2013/11-1)

Hα observations of the γ-ray-emitting Be/X-ray binary LSI+61°303: orbital modulation, disk truncation, and long-term variability.

ZAMANOV R., STOYANOV K., MARTI J., TOMOV N.A., BELCHEVA G., LUQUE-ESCAMILLA P.L. and LATEV G.

Abstract (from CDS):

We report 138 spectral observations of the Hα emission line of the radio- and γ-ray-emitting Be/X-ray binary LSI+61°303 obtained during the period of September 1998 - January 2013. From measuring various Hα parameters, we found that the orbital modulation of the Hα is best visible in the equivalent width ratio EW(B)/EW(R), the equivalent width of the blue hump, and in the radial velocity of the central dip. The periodogram analysis confirmed that the Hα emission is modulated with the orbital and superorbital periods. For the past 20 years the radius of the circumstellar disk is similar to the Roche lobe size at the periastron. It is probably truncated by a 6:1 resonance. The orbital maximum of the equivalent width of Hα emission peaks after the periastron and coincides on average with the X-ray and γ-ray maxima. All the spectra are available upon request from the authors and through the CDS.

Abstract Copyright:

Journal keyword(s): stars: individual: LSI+61303 - stars: winds, outflows - stars: emission-line, Be - X-rays: binaries

VizieR on-line data: <Available at CDS (J/A+A/559/A87): table1.dat sp/*>

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V635 Cas HXB 01 18 31.9704429246 +63 44 33.071137750 17.05 16.64 15.19 14.34 13.22 B0.2Ve 661 0
2 IC 1805 OpC 02 32 42 +61 27.0   7.03 6.5     ~ 473 2
3 LS I +61 303 HXB 02 40 31.6641883136 +61 13 45.591138110 11.27 11.61 10.75 10.19 9.55 B0Ve 761 2
4 V* X Per HXB 03 55 23.0778791365 +31 02 45.045745259 6.090 6.840 6.720     O9.5III 901 0
5 LS V +44 17 HXB 04 40 59.3295352454 +44 31 49.258751047 11.02 11.42 10.73 10.28 9.76 B0.2Ve 97 0
6 HD 245770 HXB 05 38 54.5749436467 +26 18 56.839215267 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 870 0
7 HD 259440 HXB 06 32 59.2566624297 +05 48 01.162565528 9.17 9.58 9.12     B0pe 186 0
8 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3923 0
9 BD+53 2790 HXB 22 07 56.2368407539 +54 31 06.405811141 9.4 10.11 9.84 9.64 9.43 O9.5Vep 173 0
10 HD 215227 Be* 22 42 57.30295 +44 43 18.2525 8.07 8.86 8.81     B1.5-B2III 79 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-14:54:48

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