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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Detalles Bibliográficos
Autores principales:	Paron, S., Weidmann, W.
Formato:	JOUR
Materias:	H ii regions ISM: clouds Stars: formation
Acceso en línea:	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	todo:paper_00358711_v408_n4_p2487_Paron
record_format	dspace
spelling	todo:paper_00358711_v408_n4_p2487_Paron2023-10-03T14:46:59Z The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region Paron, S. Weidmann, W. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 Paron, S. Weidmann, W. 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.
format	JOUR
author	Paron, S. Weidmann, W.
author_facet	Paron, S. Weidmann, W.
author_sort	Paron, S.
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
url	http://hdl.handle.net/20.500.12110/paper_00358711_v408_n4_p2487_Paron
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The Ap 2-1 nebula and the surrounding molecular cloud G35.2 - 0.74: An active star-forming region

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