Exploring molecular complexity with alma (EMoCA): high-angular-resolution observations of sagittarius B2(N) at 3 mm

Müller, Holger S.P.

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https://hdl.handle.net/2142/79062 Copy

Description

Title

Exploring molecular complexity with alma (EMoCA): high-angular-resolution observations of sagittarius B2(N) at 3 mm

Author(s)

Müller, Holger S.P.

Contributor(s)

• Garrod, Robin T.
• Menten, Karl M.
• Belloche, Arnaud

Issue Date

25-Jun-15

Keyword(s)

Astronomy

Abstract

Sagittarius (Sgr for short) B2 is the most massive and luminous star-forming region in our Galaxy, located close to the Galactic Center. We have carried out a molecular line survey with the IRAM~30~m telescope toward its two major sites of star-formation, Sgr~B2(M) and (N).footnote{A. Belloche et al., textit{A&A} textbf{559} (2013) Art. No. A47.} Toward the latter source, which is particularly rich in Complex Organic Molecules (COMs), we detected three molecules for the first time in space, aminoacetonitrile, ethyl formate, and textit{n}-propyl cyanide. We have recently obtained ALMA data of Sgr~B2(N) between $sim$84 and $sim$111~GHz within Cycle~0 and one additional setup up to 114.4~GHz within Cycle~1. At angular resolutions of $1.8''$ and $1.4''$, respectively, the two main hot cores, the prolific Sgr~B2(N-LMH) (or Sgr~B2(N)-SMA1) and the likely less evolved Sgr~B2(N)-SMA2 are well separated, and line confusion is reduced greatly for the latter. As a consequence, we have been able to identify the first branched alkyl molecule in space, textit{iso}-propyl cyanide, toward Sgr~B2(N)-SMA2.footnote{A. Belloche et al., textit{Science} textbf{345} (2014) 1584.} Our ongoing analyses include investigations of cyanides and isocyanides, alkanols and thioalkanols, and deuterated molecules among others. We will present some of our results.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

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http://hdl.handle.net/2142/79062

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