Artículo
Four annular structures in a protostellar disk less than 500,000 years old
Segura Cox, Dominique M.; Schmiedeke, Anika; Pineda, Jaime E.; Stephens, Ian; Fernandez Lopez, Manuel
; Looney, Leslie W.; Caselli, Paola; Li, Zhi-Yun; Mundy, Lee G.; Kwon, Woojin; Harris, Robert J.
Fecha de publicación:
10/2020
Editorial:
Nature Publishing Group
Revista:
Nature
ISSN:
0028-0836
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Annular structures (rings and gaps) in disks around pre-main-sequence stars have been detected in abundance towards class II protostellar objects that are approximately 1,000,000 years old1. These structures are often interpreted as evidence of planet formation1–3, with planetary-mass bodies carving rings and gaps in the disk4. This implies that planet formation may already be underway in even younger disks in the class I phase, when the protostar is still embedded in a larger-scale dense envelope of gas and dust5. Only within the past decade have detailed properties of disks in the earliest star-forming phases been observed6,7. Here we report 1.3-millimetre dust emission observations with a resolution of five astronomical units that show four annular substructures in the disk of the young (less than 500,000 years old)8 protostar IRS 63. IRS 63 is a single class I source located in the nearby Ophiuchus molecular cloud at a distance of 144 parsecs9, and is one of the brightest class I protostars at millimetre wavelengths. IRS 63 also has a relatively large disk compared to other young disks (greater than 50 astronomical units)10. Multiple annular substructures observed towards disks at young ages can act as an early foothold for dust-grain growth, which is a prerequisite of planet formation. Whether or not planets already exist in the disk of IRS 63, it is clear that the planet-formation process begins in the initial protostellar phases, earlier than predicted by current planet-formation theories11.
Palabras clave:
Planetary Astrophysics
,
Stellar Astrophysics
Archivos asociados
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Identificadores
Colecciones
Articulos(IAR)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
Segura Cox, Dominique M.; Schmiedeke, Anika; Pineda, Jaime E.; Stephens, Ian; Fernandez Lopez, Manuel; et al.; Four annular structures in a protostellar disk less than 500,000 years old; Nature Publishing Group; Nature; 586; 7828; 10-2020; 228-231
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