The GRAVITY young stellar object survey: XII. The hot gas disk component in 
Herbig Ae/Be stars

Garcia Lopez, R.; Natta, A.; Fedriani, R.; Garatti, A. Caratti O.; Sanchez-Bermudez, J.; Perraut, K.; Dougados, C.; Bouarour, Y. -I.; Bouvier, J.; Brandner, W.; Garcia, P.; Koutoulaki, M.; Labadie, L.; Linz, H.; Alecian, E.; Benisty, M.; Berger, J. -p.; Bourdarot, G.; Caselli, P.; Clenet, Y.; de Zeeuw, P. T.; Davies, R.; Eckart, A.; Eisenhauer, F.; Foerster Schreiber, N. M.; Gendron, E.; Gillessen, S.; Grant, S.; Henning, Th.; Kervella, P.; Lacour, S.; Lapeyrere, V.; Le Bouquin, J. -b.; Lutz, D.; Mang, F.; Nowacki, H.; Ott, T.; Paumard, T.; Perrin, G.; Shangguan, J.; Shimizu, T.; Soulain, A.; Straubmeier, C.; Sturm, E.; Tacconi, L.; van Dishoeck, E. F.; Vincent, F.; Widmann, F.

doi:10.1051/0004-6361/202245804

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

The GRAVITY young stellar object survey: XII. The hot gas disk component in Herbig Ae/Be stars

MPS-Authors

/persons/resource/persons268015

Bourdarot, G.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons133043

Caselli, P.
Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons208361

Davies, R.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4766

Eisenhauer, F.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4923

Foerster Schreiber, N. M.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4768

Gillessen, S.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons274646

Grant, S.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4584

Lutz, D.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons269976

Mang, F.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons16190

Ott, T.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons232571

Shangguan, J.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons206401

Shimizu, T.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4650

Sturm, E.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons4582

Tacconi, L.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

/persons/resource/persons214431

Widmann, F.
Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Garcia Lopez, R., Natta, A., Fedriani, R., Garatti, A. C. O., Sanchez-Bermudez, J., Perraut, K., et al. (2024). The GRAVITY young stellar object survey: XII. The hot gas disk component in Herbig Ae/Be stars. ASTRONOMY & ASTROPHYSICS, 684: A43. doi:10.1051/0004-6361/202245804.

Cite as: https://hdl.handle.net/21.11116/0000-0010-042C-9

Abstract

Context. The region of protoplanetary disks closest to a star (within 1-2 au) is shaped by a number of different processes, from accretion of the disk material onto the central star to ejection in the form of winds and jets. Optical and near-IR emission lines are potentially good tracers of inner disk processes if very high spatial and/or spectral resolution are achieved. Aims. In this paper, we exploit the capabilities of the VLTI-GRAVITY near-IR interferometer to determine the location and kinematics of the hydrogen emission line Br gamma. Methods. We present VLTI-GRAVITY observations of the Br gamma line for a sample of 26 stars of intermediate mass (HAEBE), the largest sample so far analysed with near-IR interferometry. Results. The Br gamma line was detected in 17 objects. The emission is very compact (in most cases only marginally resolved), with a size of 10-30 R*(1-5 mas). About half of the total flux comes from even smaller regions, which are unresolved in our data. For eight objects, it was possible to determine the position angle (PA) of the line-emitting region, which is generally in agreement with that of the inner-dusty disk emitting the K-band continuum. The position-velocity pattern of the Br gamma line-emitting region of the sampled objects is roughly consistent with Keplerian rotation. The exception is HD 45677, which shows more extended emission and more complex kinematics. The most likely scenario for the Br gamma origin is that the emission comes from an MHD wind launched very close to the central star, in a region well within the dust sublimation radius. An origin in the bound gas layer at the disk surface cannot be ruled out, while accreting matter provides only a minor fraction of the total flux. Conclusions. These results show the potential of near-IR spectro-interferometry to study line emission in young stellar objects.