Star Formation Near Photodissociation Regions: Detection of a Peculiar Protostar Near Ced 201
Javier R. Goicoechea (LERMA), Olivier Berne (CESR), Maryvonne Gerin, (LERMA), Christine Joblin (CESR), David Teyssier (LERMA)

TL;DR
This study reports the detection and detailed analysis of a peculiar low-mass protostar near Ced 201 PDR, revealing its physical properties, accretion activity, and environmental influences, contributing to understanding triggered star formation.
Contribution
First detailed multi-wavelength characterization of a peculiar protostar near Ced 201, combining dust continuum, IR, and molecular line observations to model its envelope and accretion processes.
Findings
Protostar is a transition Class 0/I object or multiple system.
Presence of collimated molecular outflow indicates ongoing accretion.
Envelope modeling suggests inward motions and specific ionization conditions.
Abstract
We present the detection and characterization of a peculiar low-mass protostar (IRAS 22129+7000) located ~0.4 pc from Ced 201 Photodissociation Region (PDR) and ~0.2 pc from the HH450 jet. The cold circumstellar envelope surrounding the object has been mapped through its 1.2 mm dust continuum emission with IRAM-30m/MAMBO. The deeply embedded protostar is clearly detected with Spitzer/MIPS (70 um), IRS (20-35 um) and IRAC (4.5, 5.8, and 8 um) but also in the K_s band (2.15 um). Given the large "near- and mid-IR excess" in its spectral energy distribution, but large submillimeter-to-bolometric luminosity ratio (~2%), IRAS 22129+7000 must be a transition Class 0/I source and/or a multiple stellar system. Targeted observations of several molecular lines from CO, 13CO, C18O, HCO+ and DCO+ have been obtained. The presence of a collimated molecular outflow mapped with the CSO telescope in the…
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