T CrA has a companion: First direct detection of T CrA B with VLTI/MATISSE
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866929753578012672 |
|---|---|
| author | Varga, J. Matter, A. Millour, F. Weigelt, G. van Boekel, R. Lopez, B. Lykou, F. Kóspál, Á Chen, L. Boley, P. A. Wolf, S. Hogerheijde, M. Moór, A. Ábrahám, P. Augereau, J. -C. de Miera, F. Cruz-Saenz Danchi, W. -C. Henning, Th. Juhász, T. Priolet, P. Scheuck, M. Scigliuto, J. van Haastere, L. Zwicky, L. |
| author_facet | Varga, J. Matter, A. Millour, F. Weigelt, G. van Boekel, R. Lopez, B. Lykou, F. Kóspál, Á Chen, L. Boley, P. A. Wolf, S. Hogerheijde, M. Moór, A. Ábrahám, P. Augereau, J. -C. de Miera, F. Cruz-Saenz Danchi, W. -C. Henning, Th. Juhász, T. Priolet, P. Scheuck, M. Scigliuto, J. van Haastere, L. Zwicky, L. |
| contents | 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 $Δr = 153.2 \pm 1.2$ mas ($\approx 23$ au) toward the west direction at a position angle of $275.4 \pm 0.1^\circ$, 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 $\sim 1$ 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). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_08523 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | T CrA has a companion: First direct detection of T CrA B with VLTI/MATISSE Varga, J. Matter, A. Millour, F. Weigelt, G. van Boekel, R. Lopez, B. Lykou, F. Kóspál, Á Chen, L. Boley, P. A. Wolf, S. Hogerheijde, M. Moór, A. Ábrahám, P. Augereau, J. -C. de Miera, F. Cruz-Saenz Danchi, W. -C. Henning, Th. Juhász, T. Priolet, P. Scheuck, M. Scigliuto, J. van Haastere, L. Zwicky, L. Solar and Stellar Astrophysics Earth and Planetary Astrophysics 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 $Δr = 153.2 \pm 1.2$ mas ($\approx 23$ au) toward the west direction at a position angle of $275.4 \pm 0.1^\circ$, 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 $\sim 1$ 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). |
| title | T CrA has a companion: First direct detection of T CrA B with VLTI/MATISSE |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2503.08523 |