T CrA has a companion First direct detection of T CrA B with VLTI/MATISSE

被引：0

作者：

Varga, J. ^{[1
,2
]}

Matter, A. ^{[3
]}

Millour, F. ^{[3
]}

Weigelt, G. ^{[4
]}

van Boekel, R. ^{[5
]}

Lopez, B. ^{[3
]}

Lykou, F. ^{[1
,2
]}

Kospal, A. ^{[1
,2
,5
,6
]}

Chen, L. ^{[1
,2
]}

Boley, P. A. ^{[5
]}

Wolf, S. ^{[7
]}

Hogerheijde, M. ^{[8
,9
]}

Moor, A. ^{[1
,2
]}

Abraham, P. ^{[1
,2
,6
,10
]}

Augereau, J. -c. ^{[11
]}

Cruz-Saenz de Miera, F. ^{[1
,2
,12
]}

Danchi, W. -c. ^{[13
]}

Henning, Th. ^{[5
]}

Juhasz, T. ^{[1
,2
,6
]}

Priolet, P. ^{[11
]}

Scheuck, M. ^{[5
]}

Scigliuto, J. ^{[3
]}

van Haastere, L. ^{[8
]}

Zwicky, L. ^{[1
,2
]}

机构：

[1] Res Ctr Astron & Earth Sci, Konkoly Observ, HUN REN, Konkoly Thege Mikl ut 15-17, H-1121 Budapest, Hungary

[2] MTA Ctr Excellence, CSFK, Konkoly Thege Mikl ut 15-17, H-1121 Budapest, Hungary

[3] Univ Cote Azur, Observ Cote Azur, CNRS, Lab Lagrange, Nice, France

[4] Max Planck Inst Radioastron, Auf Dem Hugel 69, DE-53121 Bonn, Germany

[5] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[6] Eotvos Lorand Univ, Inst Phys, Pazmany Peter Setany 1-A, H-1117 Budapest, Hungary

[7] Univ Kiel, Inst Theoret Phys & Astrophys, Leibnizstr 15, D-24118 Kiel, Germany

[8] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[9] Univ Amsterdam, Anton Pannekoek Inst Astron, Amsterdam, Netherlands

[10] Univ Vienna, Inst Astron IFA, Turkenschanzstr 17, A-1180 Vienna, Austria

[11] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[12] Univ Toulouse, IRAP Inst Rech Astrophys & Planetol, OMP, CNRS,CNES, 9 Ave Colonel Roche, Toulouse, France

[13] NASA Goddard Space Flight Ctr, Astrophys Div, Greenbelt, MD 20771 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2025年 / 695卷

基金：

欧洲研究理事会;

关键词：

techniques: interferometric; protoplanetary disks; binaries: general; stars: individual: T CrA; stars: pre-main sequence; stars: variables: T Tauri; Herbig Ae/Be; MAIN-SEQUENCE STARS; CORONA-AUSTRALIS; BINARIES; ATLAS; DISKS;

D O I：

10.1051/0004-6361/202453443

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

T CrA is a Herbig Ae-type young star in a complex circumstellar environment; it includes a circumstellar disk, accretion streamers, jets, and outflows. It has long been suspected to be a binary. However, until now, there has been no direct detection of a companion. Here we present new VLTI/MATISSE L- and N-band observations of T CrA taken between 2023 May and 2024 August with the aim of testing the binary nature of the system. We modeled the data with a geometric model using the Python tool oimodeler. We detected a companion (T CrA B) with a projected separation of Delta r = 153.2 +/- 1.2 mas (approximate to 23 au) toward the west direction at a position angle of 275.4 +/- 0.1 degrees, in 2024 May-August. Our results support that the companion has a nearly edge-on orbit that is highly misaligned with respect to the circumprimary disk. Such a configuration could cause warping and tearing of the disk around the primary, which has been proposed by recent studies. In the L band the companion is extended, with a full width at half maximum (FWHM) size of similar to 1 au, suggesting that the emission comes from a disk around the secondary star. The companion flux is 0.2-0.3 Jy in the L band, and 0.2-0.7 Jy in the N band, accounting for 4-20% of the total emission at those wavelengths. The SED of the companion is compatible with thermal radiation of warm dust (600-800 K).

引用

页数：9

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