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A Chemical Inventory of the Disk around the Class 0 Protostar L1527 IRS with ALMA
Merel L. R. van 't Hoff, Łukasz Tychoniec, John J. Tobin +1
Planet formation starts in disks that are still embedded within their natal envelopes. Here, we compile an extensive inventory of the chemical composition of the disk and envelope…
Subarcsecond Multi-line Observations of NH with VLA toward the Class 0 Source IRAS 16293-2422
Yoshihide Yamato, Yuri Aikawa, Kenji Furuya +2
Ammonia (NH) is one of the key volatiles that plays a central role in nitrogen chemistry and its evolution during the epoch of star and planet formation. We present subarcsecon…
The factors that influence protostellar multiplicity I: Gas temperature, density, and mass in Perseus with Nobeyama
N. M. Murillo, C. M. Fuchs, D. Harsono +9
Protostellar multiplicity is common at all stages and mass ranges. However, the factors that determine the multiplicity of protostellar systems have not been systematically charact…
Identification of hot gas around low-mass protostars
Merel L. R. van 't Hoff, Edwin A. Bergin, Penelope Riley +3
The low carbon content of Earth and primitive meteorites compared to the Sun and interstellar grains suggests that carbon-rich grains were destroyed in the inner few astronomical u…
JWST/MIRI detection of suprathermal OH rotational emissions: probing the dissociation of the water by Lyman alpha photons near the protostar HOPS 370
David A. Neufeld, P. Manoj, Himanshu Tyagi +22
Using the MIRI/MRS spectrometer on JWST, we have detected pure rotational, suprathermal OH emissions from the vicinity of the intermediate-mass protostar HOPS 370 (OMC2/FIR3). Thes…
JWST observations of CO ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes
Nashanty G. C. Brunken, Will R. M. Rocha, Ewine F. van Dishoeck +38
The structure and composition of simple ices can be modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical…
Star-Gas Surface Density Correlations in Twelve Nearby Molecular Clouds I: Data Collection and Star-Sampled Analysis
Riwaj Pokhrel, Robert A. Gutermuth, Sarah K. Betti +15
We explore the relation between the stellar mass surface density and the mass surface density of molecular hydrogen gas in twelve nearby molecular clouds that are located at 1.5…
HOPS 108: Star-formation triggered by a non-thermal jet?
A. K. Díaz Rodríguez, M. Osorio, G. Anglada +12
The nature of the far-IR source HOPS 108 has been a matter of debate in the last years. Previous radio observations detected a 3.6 cm source (VLA 12), coincident with HOPS 108, tha…
The evolution of far-infrared CO emission from protostars
P. Manoj, J. D. Green, S. T. Megeath +7
We investigate the evolution of far-IR CO emission from protostars observed with Herschel/PACS for 50 sources from the combined sample of HOPS and DIGIT Herschel key programs. From…
Characterizing the Youngest Herschel-detected Protostars II. Molecular Outflows from the Millimeter and the Far-infrared
John J. Tobin, Amelia M. Stutz, P. Manoj +7
We present CARMA CO (J=1-0) observations and Herschel PACS spectroscopy, characterizing the outflow properties toward extremely young and deeply embedded protostars in the Orion mo…
CARMA Large Area Star Formation Survey: Dense Gas in the Young L1451 Region of Perseus
Shaye Storm, Lee G. Mundy, Katherine I. Lee +18
We present a 3 mm spectral line and continuum survey of L1451 in the Perseus Molecular Cloud. These observations are from the CARMA Large Area Star Formation Survey (CLASSy), which…
Herschel/PACS Spectroscopic Survey of Protostars in Orion: The Origin of Far-Infrared CO Emission
P. Manoj, D. M. Watson, D. A. Neufeld +14
We present far-IR (57-196 mu) spectra of 21 protostars in the Orion molecular clouds, obtained with the Photodetector Array Camera and Spectrometer (PACS) onboard the Herschel Spac…
Hier ist wahrhaftig ein Loch im Himmel - The NGC 1999 dark globule is not a globule
T. Stanke, A. M. Stutz, J. J. Tobin +22
The NGC 1999 reflection nebula features a dark patch with a size of ~10,000 AU, which has been interpreted as a small, dense foreground globule and possible site of imminent star f…