GRAVITY chromatic imaging of η Car's core. Milliarcsecond resolution imaging of 
the wind-wind collision zone (Brγ, He I)

Collaboration, Gravity; Sanchez-Bermudez, J.; Weigelt, G.; Bestenlehner, J. M.; Kervella, P.; Brandner, W.; Henning, Th.; Müller, A.; Perrin, G.; Pott, J. -U.; Schöller, M.; van Boekel, R.; Abuter, R.; Accardo, M.; Amorim, A.; Anugu, N.; Ávila, G.; Benisty, M.; Berger, J. P.; Blind, N.; Bonnet, H.; Bourget, P.; Brast, R.; Buron, A.; Cantalloube, F.; Caratti O Garatti, A.; Cassaing, F.; Chapron, F.; Choquet, E.; Clénet, Y.; Collin, C.; Coudé Du Foresto, V.; de Wit, W.; de Zeeuw, T.; Deen, C.; Delplancke-Ströbele, F.; Dembet, R.; Derie, F.; Dexter, J.; Duvert, G.; Ebert, M.; Eckart, A.; Eisenhauer, F.; Esselborn, M.; Fédou, P.; Garcia, P. J. V.; Garcia Dabo, C. E.; Garcia Lopez, R.; Gao, F.; Gendron, E.; Genzel, R.; Gillessen, S.; Haubois, X.; Haug, M.; Haussmann, F.; Hippler, S.; Horrobin, M.; Huber, A.; Hubert, Z.; Hubin, N.; Hummel, C. A.; Jakob, G.; Jochum, L.; Jocou, L.; Karl, M.; Kaufer, A.; Kellner, S.; Kendrew, S.; Kern, L.; Kiekebusch, M.; Klein, R.; Kolb, J.; Kulas, M.; Lacour, S.; Lapeyrère, V.; Lazareff, B.; Le Bouquin, J. -B.; Léna, P.; Lenzen, R.; Lévêque, S.; Lippa, M.; Magnard, Y.; Mehrgan, L.; Mellein, M.; Mérand, A.; Moreno-Ventas, J.; Moulin, T.; Müller, E.; Müller, F.; Neumann, U.; Oberti, S.; Ott, T.; Pallanca, L.; Panduro, J.; Pasquini, L.; Paumard, T.; Percheron, I.; Perraut, K.; Petrucci, P. -O.; Pflüger, A.; Pfuhl, O.; Duc, T. P.; Plewa, P. M.; Popovic, D.; Rabien, S.; Ramirez, A.; Ramos, J.; Rau, C.; Riquelme, M.; Rodríguez-Coira, G.; Rohloff, R. -R.; Rosales, A.; Rousset, G.; Scheithauer, S.; Schuhler, N.; Spyromilio, J.; Straub, O.; Straubmeier, C.; Sturm, E.; Suarez, M.; Tristram, K. R. W.; Ventura, N.; Vincent, F.; Waisberg, I.; Wank, I.; Widmann, F.; Wieprecht, E.; Wiest, M.; Wiezorrek, E.; Wittkowski, M.; Woillez, J.; Wolff, B.; Yazici, S.; Ziegler, D.; Zins, G.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

GRAVITY chromatic imaging of η Car's core. Milliarcsecond resolution imaging of the wind-wind collision zone (Brγ, He I)

MPS-Authors

Collaboration, Gravity
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sanchez-Bermudez, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Weigelt, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bestenlehner, J. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kervella, P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Brandner, W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henning, Th.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Müller, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Perrin, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pott, J. -U.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Schöller, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

van Boekel, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Abuter, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Accardo, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Amorim, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Anugu, N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ávila, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Benisty, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Berger, J. P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Blind, N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bonnet, H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bourget, P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Brast, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Buron, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cantalloube, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Caratti O Garatti, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Cassaing, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Chapron, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Choquet, E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Clénet, Y.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Collin, C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Coudé Du Foresto, V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

de Wit, W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

de Zeeuw, T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Deen, C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Delplancke-Ströbele, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dembet, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Derie, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Dexter, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Duvert, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ebert, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Eckart, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Eisenhauer, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Esselborn, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fédou, P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Garcia, P. J. V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Garcia Dabo, C. E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Garcia Lopez, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gao, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gendron, E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Genzel, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gillessen, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Haubois, X.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Haug, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Haussmann, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hippler, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Horrobin, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Huber, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hubert, Z.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hubin, N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hummel, C. A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jakob, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jochum, L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Jocou, L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Karl, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kaufer, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kellner, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kendrew, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kern, L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kiekebusch, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Klein, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kolb, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Kulas, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lacour, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lapeyrère, V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lazareff, B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Le Bouquin, J. -B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Léna, P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lenzen, R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lévêque, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lippa, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Magnard, Y.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mehrgan, L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mellein, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mérand, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Moreno-Ventas, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Moulin, T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Müller, E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Müller, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Neumann, U.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Oberti, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ott, T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pallanca, L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Panduro, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pasquini, L.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Paumard, T.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Percheron, I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Perraut, K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Petrucci, P. -O.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pflüger, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pfuhl, O.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Duc, T. P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Plewa, P. M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Popovic, D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rabien, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ramirez, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ramos, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rau, C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Riquelme, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rodríguez-Coira, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rohloff, R. -R.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rosales, A.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rousset, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Scheithauer, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Schuhler, N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Spyromilio, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Straub, O.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Straubmeier, C.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Sturm, E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Suarez, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Tristram, K. R. W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ventura, N.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Vincent, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Waisberg, I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wank, I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Widmann, F.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wieprecht, E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wiest, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wiezorrek, E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wittkowski, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Woillez, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wolff, B.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yazici, S.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Ziegler, D.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zins, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018A&A...618A.125G
(Any fulltext)

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

Collaboration, G., Sanchez-Bermudez, J., Weigelt, G., Bestenlehner, J. M., Kervella, P., Brandner, W., et al. (2018). GRAVITY chromatic imaging of η Car's core. Milliarcsecond resolution imaging of the wind-wind collision zone (Brγ, He I). Astronomy and Astrophysics, 618.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CE52-7

Abstract

Context. η Car is one of the most intriguing luminous blue variables in the Galaxy. Observations and models of the X-ray, ultraviolet, optical, and infrared emission suggest a central binary in a highly eccentric orbit with a 5.54 yr period residing in its core. 2D and 3D radiative transfer and hydrodynamic simulations predict a primary with a dense and slow stellar wind that interacts with the faster and lower density wind of the secondary. The wind-wind collision scenario suggests that the secondary's wind penetrates the primary's wind creating a low-density cavity in it, with dense walls where the two winds interact. However, the morphology of the cavity and its physical properties are not yet fully constrained.
Aims: We aim to trace the inner ̃5-50 au structure of η Car's wind-wind interaction, as seen through Brγ and, for the first time, through the He I 2s-2p line.
Methods: We have used spectro-interferometric observations with the K-band beam-combiner GRAVITY at the VLTI. The analyses of the data include (i) parametrical model-fitting to the interferometric observables, (ii) a CMFGEN model of the source's spectrum, and (iii) interferometric image reconstruction.
Results: Our geometrical modeling of the continuum data allows us to estimate its FWHM angular size close to 2 mas and an elongation ratio ∊ = 1.06 ± 0.05 over a PA = 130° ± 20°. Our CMFGEN modeling of the spectrum helped us to confirm that the role of the secondary should be taken into account to properly reproduce the observed Brγ and He I lines. Chromatic images across the Brγ line reveal a southeast arc-like feature, possibly associated to the hot post-shocked winds flowing along the cavity wall. The images of the He I 2s-2p line served to constrain the 20 mas (̃50 au) structure of the line-emitting region. The observed morphology of He I suggests that the secondary is responsible for the ionized material that produces the line profile. Both the Brγ and the He I 2s-2p maps are consistent with previous hydrodynamical models of the colliding wind scenario. Future dedicated simulations together with an extensive interferometric campaign are necessary to refine our constraints on the wind and stellar parameters of the binary, which finally will help us predict the evolutionary path of η Car.