Chemical survey toward young stellar objects in the Perseus molecular cloud complex

Abstract

Chemical diversity of the gas in low-mass protostellar cores is widely recognized. In order to explore its origin, a survey of chemical composition toward 36 Class 0/I protostars in the Perseus molecular cloud complex, which are selected in an unbiased way under certain physical conditions, has been conducted with IRAM 30 m and NRO 45 m telescope. Multiple lines of C2H, c-C3H2 and CH3OH have been observed to characterize the chemical composition averaged over a 1000 au scale around the protostar. The derived beam-averaged column densities show significant chemical diversity among the sources, where the column density ratios of C2H/CH3OH are spread out by 2 orders of magnitude. From previous studies, the hot corino sources have abundant CH3OH but deficient C2H, their C2H/CH3OH column density ratios being relatively low. In contrast, the warm-carbon-chain chemistry (WCCC) sources are found to reveal the high C2H/CH3OH column density ratios. We find that the majority of the sources have intermediate characters between these two distinct chemistry types. A possible trend is seen between the C2H/CH3OH ratio and the distance of the source from the edge of a molecular cloud. The sources located near cloud edges or in isolated clouds tend to have a high C2H/CH3OH ratio. On the other hand, the sources having a low C2H/CH3OH ratio tend to be located in inner regions of the molecular cloud complex. This result gives an important clue to an understanding of the origin of the chemical diversity of protostellar cores in terms of environmental effects.

arXiv commentAccepted for publication in ApJS

References in corpus (33)

• Formation of methyl formate and other organic species in the warm-up phase of hot molecular cores
• The Spitzer ice legacy: Ice evolution from cores to protostars
• Star formation in Perseus - V. Outflows detected by HARP
• Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
• The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. III. Perseus Observed with IRAC
• The Large and Small Scale Structures of Dust in the Star-Forming Perseus Molecular Cloud
• Near-arcsecond resolution observations of the hot corino of the solar type protostar IRAS 16293-2422
• Multilayer modeling of porous grain surface chemistry I. The GRAINOBLE model
• Astrochemical evolution along star formation: Overview of the IRAM Large Program ASAI
• The chemistry and spatial distribution of small hydrocarbons in UV-irradiated molecular clouds: the Orion Bar PDR
• Deuterated methanol in the pre-stellar core L1544
• Fibers in the NGC1333 proto-cluster
• Chemical differentiation in a prestellar core traces non-uniform illumination
• L483: Warm Carbon-Chain Chemistry Source Harboring Hot Corino Activity
• Discovery of a Hot Corino in the Bok Globule B335
• Astrometry of H${}_2$O Masers in Nearby Star-Forming Regions with VERA --- IV. L1448C
• A Substellar-Mass Protostar and its Outflow of IRAS 15398-3359 Revealed by Subarcsecond-Resolution Observations of H${}_2$CO and CCH
• Water and acetaldehyde in HH212: The first hot corino in Orion
• The JCMT Gould Belt Survey: Evidence for Dust Grain Evolution in Perseus Star-forming Clumps
• Deuterium fractionation in the Horsehead edge
• Carbon Chains and Methanol toward Embedded Protostars
• A study of the C${}_3$H${}_2$ isomers and isotopologues: first interstellar detection of HDCCC
• Strong irradiation of protostellar cores in Corona Australis
• An Unbiased Spectral Line Survey toward R CrA IRS7B in the 345 GHz Window with ASTE
• ALMA view of G0.253+0.016: Can cloud-cloud collision form the cloud?
• A Mapping Survey of Dense Clumps Associated with Embedded Clusters II : Can Clump-Clump Collisions Induce Stellar Clusters?
• Methanol maps of low-mass protostellar systems: the Serpens Molecular Core
• Dense gas in IRAS 20343+4129: an ultracompact HII region caught in the act of creating a cavity
• Spectral Line Survey toward Young Massive Protostar NGC 2264 CMM3 in the 4 mm, 3 mm, and 0.8 mm Bands
• Probing the effects of external irradiation on low-mass protostars through unbiased line surveys
• On the origin of C${}_4$H and CH${}_3$OH in protostellar envelopes
• The evolutionary status of dense cores in the NGC 1333 IRAS 4 region
• The chemical structure of the Class 0 protostellar envelope NGC 1333 IRAS 4A

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• Physical and chemical fingerprint of protostellar disc formation
• Chemical Variation among Protostellar Cores: Dependence on Prestellar Core Conditions
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• First Hot Corino detected around an Isolated Intermediate-Mass Protostar: Cep\,E-mm
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud
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• Sulfur-Bearing Species Tracing the Disk/Envelope System in the Class I Protostellar Source Elias 29
• Chemical survey of Class I protostars with the IRAM-30m
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): I. Detection of New Hot Corinos with ACA
• Probing the Physics of Star-Formation (ProPStar): II. The first systematic search for streamers toward protostars
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• Hunting for hot corinos and WCCC sources in the OMC-2/3 filament
• Chemical and Physical Characterization of the Isolated Protostellar Source CB68: FAUST. IV
• A 3D physico-chemical model of a pre-stellar core. I. Environmental and structural impact on the distribution of CH${}_3$OH and $c$-C${}_3$H${}_2$
• Searches for Interstellar HCCSH and H${}_2$CCS
• ORion Alma New GEneration Survey (ORANGES) I. Dust continuum and free-free emission of OMC-2/3 filament protostars
• The connection between warm carbon chain chemistry and interstellar irradiation of star-forming cores
• FAUST VII. Detection of A Hot Corino in the Prototypical Warm Carbon-Chain Chemistry Source IRAS 15398-3359
• Chemical Differentiation around Five Massive Protostars Revealed by ALMA -Carbon-Chain Species, Oxygen-/Nitrogen-Bearing Complex Organic Molecules-
• Physical conditions for dust grain alignment in Class 0 protostellar cores I. Observations of dust polarization and molecular irradiation tracers
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• Anatomy of the Class I protostar L1489 IRS with NOEMA - II. A disk replenished by a massive streamer
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• c-C3H2 deuteration towards prestellar and starless cores in the Perseus Molecular Cloud
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