2013A&A...560A..30Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.27CET04:48:25

2013A&A...560A..30Z - Astronomy and Astrophysics, volume 560A, 30-30 (2013/12-1)

Doppler tomography of the circumstellar disk of π Aquarii.

ZHARIKOV S.V., MIROSHNICHENKO A.S., POLLMANN E., DANFORD S., BJORKMAN K.S., MORRISON N.D., FAVARO A., GUARRO FLO J., TERRY J.N., DESNOUX V., GARREL T., MARTINEAU G., BUCHET Y., UBAUD S., MAUCLAIRE B., KALBERMATTEN H., BUIL C., SAWICKI C.J., BLANK T. and GARDE O.

Abstract (from CDS):

The work is aimed at studying the circumstellar disk of the bright classical binary Be star π Aqr. We analysed variations of a double-peaked profile of the Hα emission line in the spectrum of π Aqr that was observed in many phases during ∼40 orbital cycles in 2004-2013. We applied the discrete Fourier transform (DFT) method to search for periodicity in the peak intensity ratio (V/R). Doppler tomography was used to study the structure of the disk around the primary. The dominant frequency in the power spectrum of the Hα V/R ratio is 0.011873/day, which corresponds to a period of 84.2(2) days and agrees with the earlier determined orbital period of the system, Porb=84.1 days. The V/R shows a sinusoidal variation that is phase-locked with the orbital period. Doppler maps of all our spectra show a non-uniform structure of the disk around the primary: a ring with the inner and outer radii at Vin≃450km/s and Vout ≃200km/s, respectively, along with an extended stable region (spot) at Vx ≃ 225km/s and Vy≃100km/s. The disk radius of ≃65R=0.33AU was estimated by assuming Keplerian motion of a particle on a circular orbit at the disk's outer edge.

Abstract Copyright:

Journal keyword(s): binaries: spectroscopic - circumstellar matter - stars: emission-line, Be - stars: individual: pi Aquarii - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/560/A30): table1.dat table1.fits spectra/*>

Simbad objects: 9

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Number of rows : 9

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 * phi Per Be* 01 43 39.6379209 +50 41 19.432832 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 535 0
2 HD 41335 Be* 06 04 13.5022124890 -06 42 32.225555101 4.31 5.14 5.21 5.13 5.09 B3/5Vnne 275 0
3 HD 58978 Be* 07 26 59.4826767357 -23 05 09.683936209 4.51 5.45 5.56 7.05   B0.5IVe 214 0
4 * kap Dra Be* 12 33 28.9420577565 +69 47 17.633094524 3.18 3.75 3.89 3.84 3.92 B6IIIe 356 0
5 * 4 Her Be* 15 55 30.5918031179 +42 33 58.287739693 5.23 5.64 5.75   5.82 B9pe 169 0
6 * z Her Be* 17 50 03.3350227341 +48 23 38.946882803 6.380 6.790 6.890     B6IIInp_sh 150 0
7 * f01 Cyg Be* 20 59 49.5516391039 +47 31 15.378902421 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 468 0
8 * eps Cap Be* 21 37 04.8306787 -19 27 57.646354 3.69 4.35 4.55 4.60 4.74 B3V 241 0
9 * pi. Aqr Be* 22 25 16.6228499 +01 22 38.634579 3.64 4.60 4.64 4.48 4.48 B1III-IVe 388 0

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2020.10.27-04:48:25

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