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          Institute: MPI für Radioastronomie     Collection: Publikationen des MPI für Radioastronomie     Display Documents



ID: 125434.0, MPI für Radioastronomie / Publikationen des MPI für Radioastronomie
Interferometric observations of FeO towards Sagittarius B2
Authors:Furuya, R. S.; Walmsley, C. M.; Nakanishi, K.; Schilke, P.; Bachiller, R.
Language:English
Date of Publication (YYYY-MM-DD):2003-10
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:Astron. Astrophys.
Volume:409
Issue / Number:2
Start Page:L21
End Page:L24
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We have used the Nobeyama Millimeter Array (NMA) to carry out aperture synthesis observations of the J = 5-4 ground state rotational transition of FeO molecule at 153.135273 GHz towards the galactic center HII region Sagittarius B2 Main (Sgr B2 M). We confirm the detection of this line in absorption with the IRAM 30-m telescope by Walmsley et al. (2002). Due to the higher angular resolution (6.'5 X 3."0) of our NMA observations, we were able to show that the absorption has a broader line width and a deeper apparent optical depth toward the central 9.'2 X 8."0 area around the ultra-compact (UC) HII regions. This suggests a higher column density of FeO towards the UCHII regions associated with Sgr B2 M than along adjacent lines of sight sampled with the IRAM 30-m telescope. Our results will be a crucial step toward understanding not only the chemistry of iron-bearing species in the interstellar medium, but also the degree of depletion of heavy elements.
Free Keywords:astrochemistry, ISM : abundances, HII regions, molecules, individual : Sagittarius B2 Main, techniques : interferometric
Comment of the Author/Creator:Date: 2003, OCT
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Radioastronomie
External Affiliations:Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy.; Natl Astron Observ Japan, Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, Japan.; Max Planck Inst Radioastron, D-53121 Bonn, Germany.; Observ Astron Nacl, Madrid 28800, Spain.
Identifiers:ISI:000185534000004 [ID No:1]
ISSN:0004-6361 [ID No:2]
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