Artículo
Confirming the Explosive Outflow in G5.89 with ALMA
Zapata, Luis A.; Ho, Paul T. P.; Fernandez Lopez, Manuel
; Guzmán Ccolque, Estrella
; Rodríguez, Luis F.; Reyes Valdés, José; Bally, John; Palau, Aina; Saito, Masao; Sanhueza, Patricio; Rivera Ortiz, P. R.; Rodríguez González, A.
Fecha de publicación:
10/2020
Editorial:
IOP Publishing
Revista:
Astrophysical Journal Letters
ISSN:
2041-8205
e-ISSN:
2041-8213
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The explosive molecular outflow detected decades ago in the Orion BN/KL region of massive star formation was considered to be a bizarre event. This belief was strengthened by the nondetection of similar cases over the years with the only exception of the marginal case of DR21. Here, we confirm a similar explosive outflow associated with the UCHII region G5.89-0.39 that indicates that this phenomenon is not unique to Orion or DR21. Sensitive and high angular resolution (∼0.″1) Atacama Large Millimeter/submillimeter Array (ALMA) CO(2-1) and SiO(5-4) observations show that the molecular outflow in the massive star-forming region G5.89-0.39 is indeed an explosive outflow with an age of about 1000 yr and a liberated kinetic energy of 1046-49 erg. Our new CO(2-1) ALMA observations revealed over 30 molecular filaments, with Hubble-like expansion motions, pointing to the center of UCHII region. In addition, the SiO(5-4) observations reveal warmer and strong shocks very close to the origin of the explosion, confirming the true nature of the flow. A simple estimation for the occurrence of these explosive events during the formation of the massive stars indicates an event rate of once every ∼100 yr, which is close to the supernovae rate.
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Articulos(IAR)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
Zapata, Luis A.; Ho, Paul T. P.; Fernandez Lopez, Manuel; Guzmán Ccolque, Estrella; Rodríguez, Luis F.; et al.; Confirming the Explosive Outflow in G5.89 with ALMA; IOP Publishing; Astrophysical Journal Letters; 902; 2; 10-2020
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