APEX 1 mm line survey of the Orion Bar

Abstract

Unbiased molecular line surveys are a powerful tool for analyzing the physical and chemical parameters of astronomical objects and are the only means for obtaining a complete view of the molecular inventory for a given source. The present work stands for the first such investigation of a photon-dominated region. The first results of an ongoing millimeter-wave survey obtained towards the Orion Bar are reported. The APEX telescope in combination with the APEX-2A facility receiver was employed in this investigation. We derived the physical parameters of the gas through LVG analyses of the methanol and formaldehyde data. Information on the sulfur and deuterium chemistry of photon-dominated regions is obtained from detections of several sulfur-bearing molecules and DCN.

arXiv commentAPEX A&A special issue, accepted

References in corpus (3)

• First detection of triply-deuterated methanol
• Are PAHs precursors of small hydrocarbons in Photo--Dissociation Regions? The Horsehead case
• Atomic Deuterium/Hydrogen in the Galaxy

Cited by in corpus (34)

• Modeling Sulfur Depletion in Interstellar Clouds
• Orion's Bar: Physical Conditions across the Definitive H+ / H0 / H2 Interface
• PDRs4All III: JWST's NIR spectroscopic view of the Orion Bar
• PDRs4All: A JWST Early Release Science Program on radiative feedback from massive stars
• Deuteration and evolution in the massive star formation process: the role of surface chemistry
• Deuterium chemistry in the Orion Bar PDR - "warm" chemistry starring CH2D+
• Complex organic molecules in strongly UV-irradiated gas
• Electron-impact rotational and hyperfine excitation of HCN, HNC, DCN and DNC
• Chemical stratification in the Orion Bar: JCMT Spectral Legacy Survey observations
• Abundances of sulphur molecules in the Horsehead nebula. First NS+ detection in a photodissociation region
• Spatially extended OH+ emission from the Orion Bar and Ridge
• Deuterium fractionation in the Horsehead edge
• Detection of HF emission from the Orion Bar
• Bottlenecks to interstellar sulfur chemistry: Sulfur-bearing hydrides in UV-illuminated gas and grains
• ExoMol molecular line lists - XXVI: spectra of SH and NS
• A 1.3 cm Line Survey toward Orion KL
• Kinetic temperature of massive star forming molecular clumps measured with formaldehyde
• Deuteration around the ultracompact HII region Mon R2
• Herschel / HIFI spectral line survey of the Orion Bar - Temperature and density differentiation near the PDR surface
• A Multi-Wavelength High Resolution Study of the S255 Star Forming Region. General structure and kinematics
• H2CO and CH3OH maps of the Orion Bar photodissociation region
• The JCMT Spectral Legacy Survey
• A non-equilibrium ortho-to-para ratio of water in the Orion PDR
• TIMASSS : The IRAS16293-2422 Millimeter And Submillimeter Spectral Survey: Tentative Detection of Deuterated Methyl Formate (DCOOCH3)
• Revised spectroscopic parameters of SH${}^{+}$ from ALMA and IRAM 30 m observations
• The water line emission and ortho-to-para ratio in the Orion Bar photon-dominated region
• AB Aur, a Rosetta stone for studies of planet formation (II): H${}_2$S detection and sulfur budget
• Analysis of the Herschel/HEXOS Spectral Survey Towards Orion South: A massive protostellar envelope with strong external irradiation
• The L1157-B1 astrochemical laboratory: testing the origin of DCN
• An ALCHEMI inspection of sulphur-bearing species towards the central molecular zone of NGC 253
• The distribution of deuterated formaldehyde within Orion-KL
• Molecular deuterations in massive Starless Clump Candidates
• Detection of Dust Condensations in the Orion Bar Photon-dominated Region
• First detection of deuterated methylidyne (CD) in the interstellar medium