Context. Very low-mass stars are known to have jets and outflows, which is indicative of a scaled-down version of low-mass star formation. However, only very few outflows in very low-mass sources are well characterized.Aims. We characterize the bipolar molecular outflow of the very low-mass star Par-Lup3-4, a 0.12 M-circle dot object known to power an optical jet.Methods. We observed Par-Lup3-4 with ALMA in Bands 6 and 7, detecting both the continuum and CO molecular gas. In particular, we studied three main emission lines: CO(2-1), CO(3-2), and (CO)-C-13(3-2).Results. Our observations reveal for the first time the base of a bipolar molecular outflow in a very low-mass star, as well as a stream of material moving perpendicular to the primary outflow of this source. The primary outflow morphology is consistent with the previously determined jet orientation and disk inclination. The outflow mass is 9.5 x 10(-7)M(circle dot), with an outflow rate of 4.3 x 10(-9)M(circle dot) yr(-1). A new fitting to the spectral energy distribution suggests that Par-Lup3-4 may be a binary system.Conclusions. We have characterized Par-Lup3-4 in detail, and its properties are consistent with those reported in other very low-mass sources. This source provides further evidence that very low-mass sources form as a scaled-down version of low-mass stars.

Bipolar molecular outflow of the very low-mass star Par-Lup3-4. Evidence for scaled-down low-mass star formation / A. Santamaría-Miranda; I. de Gregorio-Monsalvo; N. Huélamo; A. L. Plunkett; Á. Ribas; F. Comerón; M. R. Schreiber; C. López; K. Mužić; L. Testi. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 640:(2020), pp. A13.1-A13.16. [10.1051/0004-6361/202038128]

Bipolar molecular outflow of the very low-mass star Par-Lup3-4. Evidence for scaled-down low-mass star formation

L. Testi
2020

Abstract

Context. Very low-mass stars are known to have jets and outflows, which is indicative of a scaled-down version of low-mass star formation. However, only very few outflows in very low-mass sources are well characterized.Aims. We characterize the bipolar molecular outflow of the very low-mass star Par-Lup3-4, a 0.12 M-circle dot object known to power an optical jet.Methods. We observed Par-Lup3-4 with ALMA in Bands 6 and 7, detecting both the continuum and CO molecular gas. In particular, we studied three main emission lines: CO(2-1), CO(3-2), and (CO)-C-13(3-2).Results. Our observations reveal for the first time the base of a bipolar molecular outflow in a very low-mass star, as well as a stream of material moving perpendicular to the primary outflow of this source. The primary outflow morphology is consistent with the previously determined jet orientation and disk inclination. The outflow mass is 9.5 x 10(-7)M(circle dot), with an outflow rate of 4.3 x 10(-9)M(circle dot) yr(-1). A new fitting to the spectral energy distribution suggests that Par-Lup3-4 may be a binary system.Conclusions. We have characterized Par-Lup3-4 in detail, and its properties are consistent with those reported in other very low-mass sources. This source provides further evidence that very low-mass sources form as a scaled-down version of low-mass stars.
2020
Bipolar molecular outflow of the very low-mass star Par-Lup3-4. Evidence for scaled-down low-mass star formation / A. Santamaría-Miranda; I. de Gregorio-Monsalvo; N. Huélamo; A. L. Plunkett; Á. Ribas; F. Comerón; M. R. Schreiber; C. López; K. Mužić; L. Testi. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 640:(2020), pp. A13.1-A13.16. [10.1051/0004-6361/202038128]
A. Santamaría-Miranda; I. de Gregorio-Monsalvo; N. Huélamo; A. L. Plunkett; Á. Ribas; F. Comerón; M. R. Schreiber; C. López; K. Mužić; L. Testi
File in questo prodotto:
File Dimensione Formato  
aa38128-20.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per accesso libero gratuito
Dimensione 45.47 MB
Formato Adobe PDF
45.47 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/940972
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact