Doppler tomography of the circumstellar disk of π Aquarii

S. V. Zharikov, A. S. Miroshnichenko, E. Pollmann, S. Danford, K. S. Bjorkman, N. D. Morrison, A. Favaro, J. Guarro Fló, J. N. Terry, V. Desnoux, T. Garrel, G. Martineau, Y. Buchet, S. Ubaud, B. Mauclaire, H. Kalbermatten, C. Buil, C. J. Sawicki, T. Blank, O. Garde

Resultado de la investigación: Contribución a una revistaArtículo

13 Citas (Scopus)

Resumen

Aims. The work is aimed at studying the circumstellar disk of the bright classical binary Be star π Aqr. Methods. 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. Results. The dominant frequency in the power spectrum of the Hα V/R ratio is 0.011873 day-1, 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 ≈ 450 km s-1 and Vout ≈ 200 km s-1, respectively, along with an extended stable region (spot) at Vx ≈ 225 km s-1 and Vy ≈ 100 km s-1. The disk radius of ≈65 R = 0.33 AU was estimated by assuming Keplerian motion of a particle on a circular orbit at the disk's outer edge.

Idioma originalInglés
Número de artículoA30
PublicaciónAstronomy and Astrophysics
Volumen560
DOI
EstadoPublicada - 1 dic 2013

Huella dactilar

tomography
orbitals
Fourier transform
periodicity
radii
binary stars
circular orbits
power spectra
periodic variations
cycles
rings
profiles
method
particle

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Zharikov, S. V., Miroshnichenko, A. S., Pollmann, E., Danford, S., Bjorkman, K. S., Morrison, N. D., ... Garde, O. (2013). Doppler tomography of the circumstellar disk of π Aquarii. Astronomy and Astrophysics, 560, [A30]. https://doi.org/10.1051/0004-6361/201322114
Zharikov, S. V. ; Miroshnichenko, A. S. ; Pollmann, E. ; Danford, S. ; Bjorkman, K. S. ; Morrison, N. D. ; Favaro, A. ; Guarro Fló, 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. ; Garde, O. / Doppler tomography of the circumstellar disk of π Aquarii. En: Astronomy and Astrophysics. 2013 ; Vol. 560.
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title = "Doppler tomography of the circumstellar disk of π Aquarii",
abstract = "Aims. The work is aimed at studying the circumstellar disk of the bright classical binary Be star π Aqr. Methods. 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. Results. The dominant frequency in the power spectrum of the Hα V/R ratio is 0.011873 day-1, 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 ≈ 450 km s-1 and Vout ≈ 200 km s-1, respectively, along with an extended stable region (spot) at Vx ≈ 225 km s-1 and Vy ≈ 100 km s-1. The disk radius of ≈65 R⊙ = 0.33 AU was estimated by assuming Keplerian motion of a particle on a circular orbit at the disk's outer edge.",
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Zharikov, SV, Miroshnichenko, AS, Pollmann, E, Danford, S, Bjorkman, KS, Morrison, ND, Favaro, A, Guarro Fló, J, Terry, JN, Desnoux, V, Garrel, T, Martineau, G, Buchet, Y, Ubaud, S, Mauclaire, B, Kalbermatten, H, Buil, C, Sawicki, CJ, Blank, T & Garde, O 2013, 'Doppler tomography of the circumstellar disk of π Aquarii', Astronomy and Astrophysics, vol. 560, A30. https://doi.org/10.1051/0004-6361/201322114

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 Fló, 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.; Garde, O.

En: Astronomy and Astrophysics, Vol. 560, A30, 01.12.2013.

Resultado de la investigación: Contribución a una revistaArtículo

TY - JOUR

T1 - Doppler tomography of the circumstellar disk of π Aquarii

AU - Zharikov, S. V.

AU - Miroshnichenko, A. S.

AU - Pollmann, E.

AU - Danford, S.

AU - Bjorkman, K. S.

AU - Morrison, N. D.

AU - Favaro, A.

AU - Guarro Fló, J.

AU - Terry, J. N.

AU - Desnoux, V.

AU - Garrel, T.

AU - Martineau, G.

AU - Buchet, Y.

AU - Ubaud, S.

AU - Mauclaire, B.

AU - Kalbermatten, H.

AU - Buil, C.

AU - Sawicki, C. J.

AU - Blank, T.

AU - Garde, O.

PY - 2013/12/1

Y1 - 2013/12/1

N2 - Aims. The work is aimed at studying the circumstellar disk of the bright classical binary Be star π Aqr. Methods. 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. Results. The dominant frequency in the power spectrum of the Hα V/R ratio is 0.011873 day-1, 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 ≈ 450 km s-1 and Vout ≈ 200 km s-1, respectively, along with an extended stable region (spot) at Vx ≈ 225 km s-1 and Vy ≈ 100 km s-1. The disk radius of ≈65 R⊙ = 0.33 AU was estimated by assuming Keplerian motion of a particle on a circular orbit at the disk's outer edge.

AB - Aims. The work is aimed at studying the circumstellar disk of the bright classical binary Be star π Aqr. Methods. 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. Results. The dominant frequency in the power spectrum of the Hα V/R ratio is 0.011873 day-1, 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 ≈ 450 km s-1 and Vout ≈ 200 km s-1, respectively, along with an extended stable region (spot) at Vx ≈ 225 km s-1 and Vy ≈ 100 km s-1. The disk radius of ≈65 R⊙ = 0.33 AU was estimated by assuming Keplerian motion of a particle on a circular orbit at the disk's outer edge.

KW - Be

KW - Binaries: spectroscopic

KW - Circumstellar matter

KW - Stars: emission-line

KW - Stars: individual: pi Aquarii

KW - Techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84889027912&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201322114

DO - 10.1051/0004-6361/201322114

M3 - Artículo

AN - SCOPUS:84889027912

VL - 560

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A30

ER -

Zharikov SV, Miroshnichenko AS, Pollmann E, Danford S, Bjorkman KS, Morrison ND y otros. Doppler tomography of the circumstellar disk of π Aquarii. Astronomy and Astrophysics. 2013 dic 1;560. A30. https://doi.org/10.1051/0004-6361/201322114