TY - JOUR

T1 - Probing the accretion-ejection connection with VLTI/AMBER: High spectral resolution observations of the herbig Ae star HD 163296

AU - Garcia Lopez, R.

AU - Tambovtseva, L.V.

AU - Schertl, D.

AU - Grinin, V.P.

AU - Hofmann, K.-H.

AU - Weigelt, G.

AU - Caratti O Garatti, A.

PY - 2015

Y1 - 2015

N2 - © ESO 2015.Context. Accretion and ejection are tightly connected and represent the fundamental mechanisms regulating star formation. However, the exact physical processes involved are not yet fully understood. Aims. We present high angular and spectral resolution observations of the Brγ emitting region in the Herbig Ae star HD 163296 (MWC 275) in order to probe the origin of this line and constrain the physical processes taking place at sub-AU scales in the circumstellar region. Methods. By means of VLTI-AMBER observations at high spectral resolution (R ~ 12 000), we studied interferometric visibilities, wavelength-differential phases, and closure phases across the Brγ line of HD 163296. To constrain the physical origin of the Brγ line in Herbig Ae stars, all the interferometric observables were compared with the predictions of a line radiative transfer disc wind model. Results. The measured visibilities clearly increase within the Brγ line, indicating that the Brγ emitting region is more compact than the con

AB - © ESO 2015.Context. Accretion and ejection are tightly connected and represent the fundamental mechanisms regulating star formation. However, the exact physical processes involved are not yet fully understood. Aims. We present high angular and spectral resolution observations of the Brγ emitting region in the Herbig Ae star HD 163296 (MWC 275) in order to probe the origin of this line and constrain the physical processes taking place at sub-AU scales in the circumstellar region. Methods. By means of VLTI-AMBER observations at high spectral resolution (R ~ 12 000), we studied interferometric visibilities, wavelength-differential phases, and closure phases across the Brγ line of HD 163296. To constrain the physical origin of the Brγ line in Herbig Ae stars, all the interferometric observables were compared with the predictions of a line radiative transfer disc wind model. Results. The measured visibilities clearly increase within the Brγ line, indicating that the Brγ emitting region is more compact than the con

U2 - 10.1051/0004-6361/201424778

DO - 10.1051/0004-6361/201424778

M3 - Article

SP - None

JO - ASTRONOMY & ASTROPHYSICS

JF - ASTRONOMY & ASTROPHYSICS

SN - 0004-6361

ER -