The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region

Using data from large-scale surveys, like 2MASS, GLIMPSE, MIPSGAL, VGPS, GRS and IPHAS, we performed a multiwavelength study of the interstellar medium in a region of about 20 × 20 arcmin2 towards the molecular cloud G35.2 - 0.74. Additionally, the Ap 2-1 nebula, which is seen in projection over the...

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Guardado en:
Detalles Bibliográficos
Publicado: 2010
Materias:
H ii regions
ISM: clouds
Stars: formation
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v408_n4_p2487_Paron
http://hdl.handle.net/20.500.12110/paper_00358711_v408_n4_p2487_Paron
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00358711_v408_n4_p2487_Paron
record_format dspace
spelling paper:paper_00358711_v408_n4_p2487_Paron2023-06-08T15:01:30Z The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region H ii regions ISM: clouds Stars: formation Using data from large-scale surveys, like 2MASS, GLIMPSE, MIPSGAL, VGPS, GRS and IPHAS, we performed a multiwavelength study of the interstellar medium in a region of about 20 × 20 arcmin2 towards the molecular cloud G35.2 - 0.74. Additionally, the Ap 2-1 nebula, which is seen in projection over the molecular cloud, was studied using optical data obtained with the 2.15-m telescope at CASLEO, Argentina. From the H i absorption study, we estimate a distance of ~2 kpc for Ap 2-1, confirming that the nebula is embedded in the south portion of the molecular cloud G35.2 - 0.74. Performing a photometric study and analysing the spectral energy distribution of the sources likely to be embedded in the cloud, we confirm that this region is very active in star formation, mainly towards the north, where we discover a cluster of young stellar objects. From the Hα and [N ii] lines, we obtain a radial velocity of vLSR~ 31 km s-1 for the Ap 2-1 nebula, in coincidence with the velocity of the molecular cloud. Finally, we conclude that Ap 2-1 is an H ii region probably excited by an early B-type star. © 2010 The Authors. Journal compilation © 2010 RAS. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v408_n4_p2487_Paron http://hdl.handle.net/20.500.12110/paper_00358711_v408_n4_p2487_Paron
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic H ii regions
ISM: clouds
Stars: formation
spellingShingle H ii regions
ISM: clouds
Stars: formation
The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region
topic_facet H ii regions
ISM: clouds
Stars: formation
description Using data from large-scale surveys, like 2MASS, GLIMPSE, MIPSGAL, VGPS, GRS and IPHAS, we performed a multiwavelength study of the interstellar medium in a region of about 20 × 20 arcmin2 towards the molecular cloud G35.2 - 0.74. Additionally, the Ap 2-1 nebula, which is seen in projection over the molecular cloud, was studied using optical data obtained with the 2.15-m telescope at CASLEO, Argentina. From the H i absorption study, we estimate a distance of ~2 kpc for Ap 2-1, confirming that the nebula is embedded in the south portion of the molecular cloud G35.2 - 0.74. Performing a photometric study and analysing the spectral energy distribution of the sources likely to be embedded in the cloud, we confirm that this region is very active in star formation, mainly towards the north, where we discover a cluster of young stellar objects. From the Hα and [N ii] lines, we obtain a radial velocity of vLSR~ 31 km s-1 for the Ap 2-1 nebula, in coincidence with the velocity of the molecular cloud. Finally, we conclude that Ap 2-1 is an H ii region probably excited by an early B-type star. © 2010 The Authors. Journal compilation © 2010 RAS.
title The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region
title_short The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region
title_full The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region
title_fullStr The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region
title_full_unstemmed The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region
title_sort ap 2-1 nebula and the surrounding molecular cloud g35.2 - 0.74: an active star-forming region
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v408_n4_p2487_Paron
http://hdl.handle.net/20.500.12110/paper_00358711_v408_n4_p2487_Paron
_version_ 1768546338199306240

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