The wind and the magnetospheric accretion onto the T Tauri star S Coronae Australis at sub-au resolution
R. Garcia Lopez
,
K. Perraut
(1)
,
A. Caratti O Garatti
,
B. Lazareff
(1)
,
J. Sanchez-Bermudez
(2)
,
M. Benisty
(1)
,
C. Dougados
(1)
,
L. Labadie
(1)
,
W. Brandner
(3)
,
J. Garcia
,
Th. Henning
(3)
,
P. Ray
(4)
,
R. Abuter
(2)
,
A. Amorim
,
N. Anugu
,
J. Berger
,
H. Bonnet
,
A. Buron
,
P. Caselli
(5)
,
Y. Clenet
(6)
,
Vincent Coudé Du Forestol
(6)
,
W. de Wit
,
C. Deen
,
F. Delplancke-Ströbele
,
J. Dexter
,
A. Eckart
(7)
,
F. Eisenhauer
(8)
,
C. Garcia
,
E. Gendron
(6)
,
R. Genzel
(8)
,
S. Gillessen
(8)
,
X. Haubois
,
M. Haug
,
F. Haussmann
,
S. Hippler
,
Z. Hubert
(6)
,
A. Hummel
(9)
,
M. Horrobin
(10)
,
L. Jocou
(1)
,
S. Kellner
,
P. Kervella
(6)
,
M. Kulas
,
J. Kolb
,
S. Lacour
(11)
,
B. Le Bouquin
,
P. Lena
(6)
,
M. Lippa
,
A. Merand
(2)
,
E. Müller
,
T. Ott
(12)
,
J. Panduro
,
T. Paumard
(6)
,
G. Perrin
(6)
,
O. Pfuhl
(8)
,
A. Ramírez
(13)
,
C. Rau
(14)
,
R. Rohloff
,
G. Rousset
(6)
,
S. Scheithauer
,
M. Scholler
(15)
,
C. Straubmeier
(16)
,
E. Sturm
(8)
,
W. Thi
,
E. van Dishoeck
(17)
,
F. Vincent
(6)
,
I. Waisberg
,
I. Wank
,
E. Wieprecht
,
M. Wiest
,
E. Wiezorrek
(8)
,
J. Woillez
(2)
,
S. Yazici
,
G. Zins
(1)
1
IPAG -
Institut de Planétologie et d'Astrophysique de Grenoble
2 ESO - European Southern Observatory
3 MPIA - Max-Planck-Institut für Astronomie
4 DALEMBERT - Institut Jean Le Rond d'Alembert
5 OAA - INAF - Osservatorio Astrofisico di Arcetri
6 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
7 MPIFR - Max-Planck-Institut für Radioastronomie
8 MPE - Max Planck Institute for Extraterrestrial Physics
9 Mayo Clinic [Rochester]
10 GEPI - Galaxies, Etoiles, Physique, Instrumentation
11 INRETS/LTE - Laboratoire Transport et Environnement
12 SSC - Swedish Space Corporation
13 CINVESTAV-IPN - Departamento de Control Automático
14 DIAMOND Light source
15 IBCP - Institut de biologie et chimie des protéines [Lyon]
16 Universität zu Köln = University of Cologne
17 Leiden Observatory [Leiden]
2 ESO - European Southern Observatory
3 MPIA - Max-Planck-Institut für Astronomie
4 DALEMBERT - Institut Jean Le Rond d'Alembert
5 OAA - INAF - Osservatorio Astrofisico di Arcetri
6 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
7 MPIFR - Max-Planck-Institut für Radioastronomie
8 MPE - Max Planck Institute for Extraterrestrial Physics
9 Mayo Clinic [Rochester]
10 GEPI - Galaxies, Etoiles, Physique, Instrumentation
11 INRETS/LTE - Laboratoire Transport et Environnement
12 SSC - Swedish Space Corporation
13 CINVESTAV-IPN - Departamento de Control Automático
14 DIAMOND Light source
15 IBCP - Institut de biologie et chimie des protéines [Lyon]
16 Universität zu Köln = University of Cologne
17 Leiden Observatory [Leiden]
R. Garcia Lopez
- Function : Author
A. Caratti O Garatti
- Function : Author
- PersonId : 764988
- ORCID : 0000-0001-8876-6614
J. Sanchez-Bermudez
- Function : Author
- PersonId : 778133
- ORCID : 0000-0002-9723-0421
M. Benisty
- Function : Author
- PersonId : 755605
- ORCID : 0000-0002-7695-7605
- IdRef : 130594024
C. Dougados
- Function : Author
- PersonId : 755730
- ORCID : 0000-0001-6660-936X
- IdRef : 114309639
W. Brandner
- Function : Author
- PersonId : 755515
- ORCID : 0000-0003-1939-6351
J. Garcia
- Function : Author
Th. Henning
- Function : Author
- PersonId : 755782
- ORCID : 0000-0002-1493-300X
A. Amorim
- Function : Author
N. Anugu
- Function : Author
J. Berger
- Function : Author
H. Bonnet
- Function : Author
A. Buron
- Function : Author
P. Caselli
- Function : Author
- PersonId : 755659
- ORCID : 0000-0003-1481-7911
- IdRef : 094785007
W. de Wit
- Function : Author
C. Deen
- Function : Author
F. Delplancke-Ströbele
- Function : Author
J. Dexter
- Function : Author
- PersonId : 783196
- ORCID : 0000-0003-3903-0373
A. Eckart
- Function : Author
- PersonId : 759889
- ORCID : 0000-0001-6049-3132
C. Garcia
- Function : Author
R. Genzel
- Function : Author
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- IdRef : 085842486
S. Gillessen
- Function : Author
- PersonId : 755358
- ORCID : 0000-0002-5708-0481
X. Haubois
- Function : Author
M. Haug
- Function : Author
F. Haussmann
- Function : Author
S. Hippler
- Function : Author
- PersonId : 783757
- ORCID : 0000-0002-3912-6108
M. Horrobin
- Function : Author
- PersonId : 758784
- ORCID : 0000-0001-5451-7847
L. Jocou
- Function : Author
- PersonId : 1337469
- ORCID : 0000-0001-9376-1818
S. Kellner
- Function : Author
P. Kervella
- Function : Author
- PersonId : 830449
- IdHAL : pierre-kervella
- ORCID : 0000-0003-0626-1749
- IdRef : 089060644
M. Kulas
- Function : Author
J. Kolb
- Function : Author
S. Lacour
- Function : Author
- PersonId : 739267
- IdHAL : sylvestre-lacour
- ORCID : 0000-0002-6948-0263
- IdRef : 129379085
B. Le Bouquin
- Function : Author
M. Lippa
- Function : Author
E. Müller
- Function : Author
J. Panduro
- Function : Author
T. Paumard
- Function : Author
- PersonId : 740129
- IdHAL : thibaut-paumard
- ORCID : 0000-0003-0655-0452
- IdRef : 090171454
G. Perrin
- Function : Author
- PersonId : 755121
- ORCID : 0000-0003-0680-0167
- IdRef : 030487641
R. Rohloff
- Function : Author
S. Scheithauer
- Function : Author
C. Straubmeier
- Function : Author
- PersonId : 759891
- ORCID : 0000-0002-0671-9302
E. Sturm
- Function : Author
- PersonId : 763193
- ORCID : 0000-0002-0018-3666
W. Thi
- Function : Author
E. van Dishoeck
- Function : Author
- PersonId : 761396
- ORCID : 0000-0001-7591-1907
- IdRef : 136541518
F. Vincent
- Function : Author
- PersonId : 806321
- ORCID : 0000-0002-3855-0708
I. Waisberg
- Function : Author
I. Wank
- Function : Author
E. Wieprecht
- Function : Author
M. Wiest
- Function : Author
J. Woillez
- Function : Author
- PersonId : 755123
- ORCID : 0000-0002-2958-4738
S. Yazici
- Function : Author
Abstract
Aims. To investigate the inner regions of protoplanetary discs, we performed near-infrared interferometric observations of the classical T Tauri binary system S CrA.Methods. We present the first VLTI-GRAVITY high spectral resolution (R ~ 4000) observations of a classical T Tauri binary, S CrA (composed of S CrA N and S CrA S and separated by ~1.̋4), combining the four 8m telescopes in dual-field mode. Results. Our observations in the near-infrared K-band continuum reveal a disc around each binary component, with similar half-flux radii of about 0.1 au at d ~ 130 pc, inclinations (i = 28 ± 3° and i = 22 ± 6°), and position angles (PA = 0°± 6° and PA = –2°± 12°), suggesting that they formed from the fragmentation of a common disc. The S CrA N spectrum shows bright He i and Brγ line emission exhibiting inverse P Cygni profiles, typically associated with infalling gas. The continuum-compensated Brγ line visibilities of S CrA N show the presence of a compact Brγ emitting region whose radius is about ~0.06 au, which is twice as big as the truncation radius. This component is mostly tracing a wind. Moreover, a slight radius change between the blue- and red-shifted Brγ line components is marginally detected.Conclusions. The presence of an inverse P Cygni profile in the He i and Brγ lines, along with the tentative detection of a slightly larger size of the blue-shifted Brγ line component, hint at the simultaneous presence of a wind and magnetospheric accretion in S CrA N.
Origin | Publication funded by an institution |
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