The Spitzer c2d Survey of Nearby Dense Cores VII: Chemistry and Dynamics in L43

Abstract

We present results from the Spitzer Space Telescope and molecular line observations of 9 species toward the dark cloud L43. The Spitzer images and molecular line maps suggest it has a starless core and a Class I protostar evolving in the same environment. CO depletion is seen in both sources, and DCO+ lines are stronger toward the starless core. With a goal of testing the chemical characteristics from pre- to protostellar stages, we adopt an evolutionary chemical model to calculate the molecular abundances and compare with our observations. Among the different model parameters we tested, the best-fit model suggests a longer total timescale at the pre-protostellar stage, but with faster evolution at the later steps with higher densities.

References in corpus (4)

• Characterizing the nature of embedded young stellar objects through silicate, ice and millimeter observations
• Molecular Emission Line Formation in Prestellar Cores
• Molecular Line Observations of the Small Protostellar Group L1251B
• Spitzer observations of a 24 micron shadow: Bok Globule CB190

Cited by in corpus (14)

• CO2 Ice toward Low-luminosity, Embedded Protostars: Evidence for Episodic Mass Accretion via Chemical History
• Disks and Outflows in CO Rovibrational Emission from Embedded, Low-Mass Young Stellar Objects
• The Spitzer c2d Survey of Nearby Dense Cores XI : Infrared and Submillimeter Observations of CB130
• The Spitzer Survey of Interstellar Clouds in the Gould Belt. V. Ophiuchus North Observed with IRAC and MIPS
• Star-forming filament models
• The JCMT BISTRO Survey: Studying the Complex Magnetic Field of L43
• Skewed Distributions and Opposite Velocity Gradients of Submillimeter Molecular Lines in Low-Mass Protostellar Envelopes
• A Catalog of Low-Mass Star-Forming Cores Observed with SHARC-II at 350 microns
• Dynamical timescale of precollapse evolution inferred from chemical distribution in the Taurus Molecular Cloud-1 (TMC-1) filament
• Ice features of low-luminosity protostars in near-infrared spectra of AKARI/IRC
• The Disappearing Envelope around the Transitional Class I Object L43
• Low-mass Star Formation: Observations
• The role of radiative torques in the molecular cloud core L43
• Evidence of Accretion Burst: The Viscously Heated Inner Disk of the Embedded Protostar IRAS 16316-1540