Artículo
Tidal Interaction between the UX Tauri A/C Disk System Revealed by ALMA
Zapata, Luis A.; Rodríguez, Luis F.; Fernandez Lopez, Manuel
; Palau, Aina; Estalella, Robert; Osorio, Mayra; Anglada, Guillem; Huelamo, Nuria
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
06/2020
Editorial:
IOP Publishing
Revista:
Astrophysical Journal
ISSN:
0004-637X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present sensitive and high angular-resolution (∼0.″2-0.″3) (sub)millimeter (230 and 345 GHz) continuum and CO(2-1)/CO(3-2) line archive observations of the disk star system in UX Tauri carried out with the Atacama Large Millimeter/Submillimeter Array. These observations reveal the gas and dusty disk surrounding the young star UX Tauri A with a large signal-to-noise ratio (>400 in the continuum and >50 in the line), and for the first time we detect the molecular gas emission associated with the disk of UX Tauri C (with a size for the disk of <56 au). No (sub)millimeter continuum emission is detected at the 5σ level (0.2 mJy at 0.85 mm) associated with UX Tauri C. For the component UX Tauri C, we estimate a dust disk mass of ≤0.05 M ⊕. Additionally, we report a strong tidal disk interaction between both disks, UX Tauri A/C, separated 360 au in projected distance. The CO line observations reveal marked spiral arms in the disk of UX Tauri A and an extended redshifted stream of gas associated with the UX Tauri C disk. No spiral arms are observed in the dust continuum emission of UX Tauri A. Assuming a Keplerian rotation we estimate the enclosed masses (disk+star) from their radial velocities in 1.4 ± 0.6 M o˙ for UX Tauri A, and 70 ± 30/sin i Jupiter masses for UX Tauri C (the latter coincides with the mass upper limit value for a brown dwarf). The observational evidence presented here lead us to propose that UX Tauri C has a close approach of a possible wide, evolving, and eccentric orbit around the disk of UX Tauri A, causing the formation of spiral arms and a stream of molecular gas falling toward UX Tauri C.
Palabras clave:
Protostars
,
Interferometry
,
Disks
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IAR)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
Zapata, Luis A.; Rodríguez, Luis F.; Fernandez Lopez, Manuel; Palau, Aina; Estalella, Robert; et al.; Tidal Interaction between the UX Tauri A/C Disk System Revealed by ALMA; IOP Publishing; Astrophysical Journal; 896; 2; 6-2020
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