363 citations · 7.5k across the 142 of their papers we have counts for
16 papers · 1 filter
The water abundance behind interstellar shocks: results from /PACS and /IRS observations of HO, CO, and H
David A. Neufeld, Antoine Gusdorf, Rolf Güsten +7
We have investigated the water abundance in shock-heated molecular gas, making use of measurements of far-infrared CO and HO line emissions in combination with $Spit…
Deuterated water in the solar-type protostars NGC 1333 IRAS 4A and IRAS 4B
A. Coutens, C. Vastel, S. Cabrit +19
Aims. The aim of this paper is to study deuterated water in the solar-type protostars NGC1333 IRAS4A and IRAS4B, to compare their HDO abundance distribution with other star-forming…
L1448-MM observations by the Herschel Key program, "Dust, Ice, and Gas In Time" (DIGIT)
Jinhee Lee, Jeong-Eun Lee, Seokho Lee +7
We present Herschel/PACS observations of L1448-MM, a Class 0 protostar with a prominent outflow. Numerous emission lines are detected at 55 < lambda < 210 micrometer including CO,…
Waterfalls around protostars: Infall motions towards Class 0/I envelopes as probed by water
J. C. Mottram, E. F. van Dishoeck, M. Schmalzl +4
Abridged abstract: For stars to form, material must fall inwards from core scales through the envelope towards the central protostar. The velocity profile around protostars is poor…
Deep observations of O2 toward a low-mass protostar with Herschel-HIFI
Umut A. Yıldız, Kinsuk Acharyya, Paul F. Goldsmith +13
According to traditional gas-phase chemical models, O2 should be abundant in molecular clouds, but until recently, attempts to detect interstellar O2 line emission with ground- and…
DIGIT: Herschel and Spitzer spectro-imaging of SMM3 and SMM4 in Serpens
O. Dionatos, J. K. Jørgensen, J. D. Green +5
We report on spectro-imaging observations employing Spitzer IRS and Herschel PACS, aiming to constrain the physical conditions around SMM3 and SMM4 in Serpens. The combined power o…
Observational evidence for dissociative shocks in the inner 100 AU of low-mass protostars using Herschel-HIFI
L. E. Kristensen, E. F. van Dishoeck, A. O. Benz +3
Herschel-HIFI spectra of H2O towards low-mass protostars show a distinct velocity component not seen in observations from the ground of CO or other species. The aim is to character…
High-J CO survey of low-mass protostars observed with Herschel-HIFI
Umut A. Yıldız, Lars E. Kristensen, Ewine F. van Dishoeck +8
The evolution of deeply embedded young stellar objects (YSOs) has traditionally been traced through dust continuum spectral energy distributions (SEDs), but the use of CO excitatio…
Outflow forces of low mass embedded objects in Ophiuchus: a quantitative comparison of analysis methods
Nienke van der Marel, Lars E. Kristensen, Ruud Visser +3
The outflow force of molecular bipolar outflows is a key parameter in theories of young stellar feedback on their surroundings. The focus of many outflow studies is the correlation…
Embedded Protostars in the Dust, Ice, and Gas In Time (DIGIT) Key Program: Continuum SEDs, and an Inventory of Characteristic Far-Infrared Lines from PACS Spectroscopy
Joel D. Green, Neal J. Evans, Jes K. Jørgensen +17
We present 50-210 um spectral scans of 30 Class 0/I protostellar sources, obtained with Herschel-PACS, and 0.5-1000 um SEDs, as part of the Dust, Ice, and Gas in Time (DIGIT) Key P…
Evolution of CO lines in time-dependent models of protostellar disk formation
Daniel Harsono, Ruud Visser, Simon Bruderer +2
(Abridged) Star and planet formation theories predict an evolution in the density, temperature, and velocity structure as the envelope collapses and forms an accretion disk. The ai…
Water in star-forming regions with Herschel (WISH). IV. A survey of low-J H2O line profiles toward high-mass protostars
Floris van der Tak, Luis Chavarria, Fabrice Herpin +4
To understand the origin of water line emission and absorption during high-mass star formation, we decompose high-resolution Herschel-HIFI line spectra toward 19 high-mass star-for…
Hot water in the inner 100 AU of the Class 0 protostar NGC1333 IRAS2A
Ruud Visser, Jes K. Jorgensen, Lars E. Kristensen +2
Evaporation of water ice above 100 K in the inner few 100 AU of low-mass embedded protostars (the so-called hot core) should produce quiescent water vapor abundances of ~10^-4 rela…
High-pressure, low-abundance water in bipolar outflows. Results from a Herschel-WISH survey
M. Tafalla, R. Liseau, B. Nisini +6
(Abridged) We present a survey of the water emission in a sample of more than 20 outflows from low mass young stellar objects with the goal of characterizing the physical and chemi…
Water in star forming regions with Herschel (WISH) III. Far-infrared cooling lines in low-mass young stellar objects
A. Karska, G. J. Herczeg, E. F. van Dishoeck +22
(Abridged) Far-infrared Herschel-PACS spectra of 18 low-mass protostars of various luminosities and evolutionary stages are studied. We quantify their far-infrared line emission an…
Herschel-HIFI observations of high-J CO and isotopologues in star-forming regions: from low- to high-mass
I. San Jose-Garcia, J. C. Mottram, L. E. Kristensen +9
Context; Our understanding of the star formation process has traditionally been confined to certain mass or luminosity boundaries because most studies focus only on low-, intermedi…