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HOPS 136: An Edge-On Orion Protostar Near the End of Envelope Infall
William J. Fischer, S. Thomas Megeath, John J. Tobin +10
Edge-on protostars are valuable for understanding the disk and envelope properties of embedded young stellar objects, since the disk, envelope, and envelope cavities are all distin…
Dense molecular cocoons in the massive protocluster W3 IRS5: a test case for models of massive star formation
K. -S. Wang, T. L. Bourke, M. R. Hogerheijde +4
[Context] Two competing models describe the formation of massive stars in objects like the Orion Trapezium. In the turbulent core accretion model, the resulting stellar masses are…
An X-rays Survey of the Young Stellar Population of the Lynds 1641 and Iota Orionis Regions
I. Pillitteri, S. J. Wolk, S. T. Megeath +12
We present an XMM-Newton survey of the part of Orion A cloud south of the Orion Nebula. This survey includes the Lynds 1641 (L1641) dark cloud, a region of the Orion A cloud with v…
Anomalous CO2 Ice Toward HOPS-68: A Tracer of Protostellar Feedback
Charles A. Poteet, Klaus M. Pontoppidan, S. Thomas Megeath +5
We report the detection of a unique CO2 ice band toward the deeply embedded, low-mass protostar HOPS-68. Our spectrum, obtained with the Infrared Spectrograph onboard the Spitzer S…
A Herschel and APEX Census of the Reddest Sources in Orion: Searching for the Youngest Protostars
Amelia M. Stutz, John J. Tobin, Thomas Stanke +13
We perform a census of the reddest, and potentially youngest, protostars in the Orion molecular clouds using data obtained with the PACS instrument onboard the Herschel Space Obser…