2019A&A...632A..18R


Query : 2019A&A...632A..18R

2019A&A...632A..18R - Astronomy and Astrophysics, volume 632A, 18-18 (2019/12-0)

Investigating the nature of the extended structure around the Herbig star RCrA using integral field and high-resolution spectroscopy.

RIGLIACO E., GRATTON R., MESA D., D'ORAZI V., BONNEFOY M., ALCALA J.M., ANTONIUCCI S., BACCIOTTI F., DIMA M., NISINI B., PODIO L., BARBIERI M., CLAUDI R., DESIDERA S., GARUFI A., HUGOT E., JANSON M., LANGLOIS M., RICKMAN E.L., SISSA E., UBEIRA GABELLINI M., VAN DER PLAS G., ZURLO A., MAGNARD Y., PERRET D., ROELFSEMA R. and WEBER L.

Abstract (from CDS):


Context. We present a detailed analysis of the extended structure detected around the young and close-by Herbig Ae/Be star R CrA. This is a young triple system with an intermediate mass central binary whose separation is of the order of a few tens of the radii of the individual components, and an M-star companion at about 30au.
Aims. Our aim is to understand the nature of the extended structure by means of combining integral-field and high-resolution spectroscopy.
Methods. We conducted the analysis based on FEROS archival optical spectroscopy data and adaptive optics images and integral-field spectra obtained with SINFONI and SPHERE at the VLT.
Results. The observations reveal a complex extended structure that is composed of at least two components: a non-uniform wide cavity whose walls are detected in continuum emission up to 400au, and a collimated wiggling-jet detected in the emission lines of helium and hydrogen. Moreover, the presence of [FeII] emission projected close to the cavity walls suggests the presence of a slower moving wind, most likely a disk wind. The multiple components of the optical forbidden lines also indicate the presence of a high-velocity jet co-existing with a slow wind. We constructed a geometrical model of the collimated jet flowing within the cavity using intensity and velocity maps, finding that its wiggling is consistent with the orbital period of the central binary. The cavity and the jet do not share the same position angle, suggesting that the jet is itself experiencing a precession motion possibly due to the wide M-dwarf companion.
Conclusions. We propose a scenario that closely agrees with the general expectation of a magneto-centrifugal-launched jet. These results build upon the extensive studies already conducted on R CrA.

Abstract Copyright: © ESO 2019

Journal keyword(s): stars: pre-main sequence - protoplanetary disks - Herbig-Haro objects - ISM: jets and outflows - ISM: individual objects: R CrA

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* RY Tau Or* 04 21 57.4092550080 +28 26 35.555316612 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 684 1
2 2MASS J04220069+2657324 Y*O 04 22 01.00944 +26 57 35.2692           ~ 35 0
3 V* DG Tau Or* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1000 1
4 HD 31648 Ae* 04 58 46.2655706952 +29 50 36.987625680 7.84 7.78 7.62 7.76 7.43 A5Vep 474 0
5 HH 34 HH 05 35 31.30 -06 28 43.0     16     ~ 479 2
6 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 358 1
7 HH 111 HH 05 51 44.2 +02 48 34           ~ 399 0
8 V* Z CMa Ae* 07 03 43.1599411656 -11 33 06.209065836 10.51 9.99 8.80     B5/8eq+F5/7 560 3
9 HH 47 HH 08 25 44.30 -51 00 26.2           ~ 244 0
10 HD 100546 Be* 11 33 25.4408872296 -70 11 41.241297948   6.71 6.30   6.64 A0VaekB8_lB 745 1
11 V* DX Cha Ae* 12 00 05.0868602544 -78 11 34.565724312   6.81 6.60     A0_sh 330 0
12 CPD-36 6759 Y*O 15 15 48.4460065200 -37 09 16.024369824   9.21 8.708     F8V 425 1
13 HD 163296 Ae* 17 56 21.2881851168 -21 57 21.871819008 7.00 6.93 6.85 6.86 6.67 A1Vep 1003 0
14 V* R CrA Ae* 19 01 53.6764322232 -36 57 08.299341828 12.781 12.651 11.917 11.242 10.412 B5IIIpe 468 1
15 NAME Coronet Cluster Cl* 19 01 54 -36 57.2           ~ 87 1
16 2MASS J19015545-3657231 Y*O 19 01 55.460 -36 57 23.13           ~ 93 2
17 HH 104A * 19 01 58.95 -36 57 17.1           ~ 17 0
18 EM* LkHA 233 Ae* 22 34 40.9923134958 +40 40 04.251892858   14.5       A7Ve 143 0

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2023.02.02-19:34:53

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