HI bubbles surrounding southern optical ring nebulae: Anon (WR 23) and RCW 52

We analyze the interstellar medium in the environs of two hot and massive stars, HD 92809 (=WR 23, WC6) and LSS 1887 (O8V), which ionize the optical ring nebulae Anon (WR 23) and RCW 52, respectively. Our analysis is based on neutral hydrogen (HI) 21 cm line data, which reveal interstellar bubbles s...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Cappa, Cristina Elisabet, Niemelä, Virpi Sinikka, Martín, M., McClure-Griffiths, N. M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Ciencias Astronómicas
HII regions
ISM: bubbles
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83397
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83397
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
HII regions
ISM: bubbles
spellingShingle Ciencias Astronómicas
HII regions
ISM: bubbles
Cappa, Cristina Elisabet
Niemelä, Virpi Sinikka
Martín, M.
McClure-Griffiths, N. M.
HI bubbles surrounding southern optical ring nebulae: Anon (WR 23) and RCW 52
topic_facet Ciencias Astronómicas
HII regions
ISM: bubbles
description We analyze the interstellar medium in the environs of two hot and massive stars, HD 92809 (=WR 23, WC6) and LSS 1887 (O8V), which ionize the optical ring nebulae Anon (WR 23) and RCW 52, respectively. Our analysis is based on neutral hydrogen (HI) 21 cm line data, which reveal interstellar bubbles surrounding the massive stars and their optical ring nebulae. The HI bubble related to WR 23 is 13.3 pc in radius and is expanding at 10 km s-1. The associated atomic neutral mass is 830 M⊙. The HI structure related to LSS 1887 is about 6.3 pc in radius, has an expansion velocity of 7 km s-1 and an associated atomic neutral mass of 100 M⊙. These HI features are the neutral counterparts of the optical ring nebulae and were mainly created by the action of the stellar winds of the massive stars on their environs. The dynamical age of the HI bubble around WR 23 (7 × 10 5 yr) suggests that it was created during the WR phase of stellar evolution. However, the large tangential motions of WR 23 and LSS 1887 suggest that part of the observed optical and HI structures may be due to a bow shock. The analysis of the distribution of emission in the far infrared and in the CO(1-0) molecular line in the environs of WR 23 and LSS 1887 reveals that there are also infrared and molecular counterparts of the detected HI bubbles.
format Articulo
Articulo
author Cappa, Cristina Elisabet
Niemelä, Virpi Sinikka
Martín, M.
McClure-Griffiths, N. M.
author_facet Cappa, Cristina Elisabet
Niemelä, Virpi Sinikka
Martín, M.
McClure-Griffiths, N. M.
author_sort Cappa, Cristina Elisabet
title HI bubbles surrounding southern optical ring nebulae: Anon (WR 23) and RCW 52
title_short HI bubbles surrounding southern optical ring nebulae: Anon (WR 23) and RCW 52
title_full HI bubbles surrounding southern optical ring nebulae: Anon (WR 23) and RCW 52
title_fullStr HI bubbles surrounding southern optical ring nebulae: Anon (WR 23) and RCW 52
title_full_unstemmed HI bubbles surrounding southern optical ring nebulae: Anon (WR 23) and RCW 52
title_sort hi bubbles surrounding southern optical ring nebulae: anon (wr 23) and rcw 52
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/83397
work_keys_str_mv AT cappacristinaelisabet hibubblessurroundingsouthernopticalringnebulaeanonwr23andrcw52
AT niemelavirpisinikka hibubblessurroundingsouthernopticalringnebulaeanonwr23andrcw52
AT martinm hibubblessurroundingsouthernopticalringnebulaeanonwr23andrcw52
AT mccluregriffithsnm hibubblessurroundingsouthernopticalringnebulaeanonwr23andrcw52
bdutipo_str Repositorios
_version_ 1764820488572370944

Ejemplares similares