INVESTIGADORES
GAMEN Roberto Claudio
artículos
Título:
Triggered star formation in a molecular shell created by a SNR?
Autor/es:
CICHOWOLSKI, S.; PINEAULT, S.; GAMEN, R. C.; ARNAL, M.; SUAD, L.; ORTEGA, M.
Revista:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2014 vol. 4 p. 1089 - 1102
ISSN:
0035-8711
Resumen:
We present a study of a new molecular shell, G 126.1-0.8-14, using
available multiwavelength Galactic plane surveys and optical Gemini
observations. A well-defined shell-like structure is observed in the
CO(1-0) line emission at (l,b) = (126.1°, -0.7°), in the
velocity range -10.5 to -15.5 km s-1. The H I emission shows
a region of low emissivity inside G 126.1-0.8-14, while radio continuum
observations reveal faint non-thermal emission possibly related to this
shell. Optical spectra obtained with Gemini South show the existence of
B-type stars likely to be associated with G 126.1-0.8-14. An estimate of
the stellar wind energy injected by these stars shows that they alone
cannot be able to create such a structure. On the other hand, one
supernova explosion would provide enough energy to generate the shell.
Using the MSX, IRAS and WISE point source catalogues we have found about
30 young stellar object candidates, whose birth could have been
triggered by the expansion of G 126.1-0.8-14. In this context, Sh2-187
could be a consequence of the action on its surroundings of the most
massive (and thus most evolve) of the stars formed by the expanding
molecular shell.