305 citations · 4.1k across the 51 of their papers we have counts for
51 papers
The APEX Large CO Heterodyne Orion Legacy Survey (ALCOHOLS). I. Survey overview
Thomas Stanke, H. G. Arce, J. Bally +29
The Orion molecular cloud complex harbours the nearest GMCs and site of high-mass star formation. Its YSO populations are thoroughly characterized. The region is therefore a prime…
Water in star-forming regions (WISH): Physics and chemistry from clouds to disks as probed by Herschel spectroscopy
E. F. van Dishoeck, L. E. Kristensen, the WISH team
(abridged) Data and results from the WISH key program are summarized, designed to provide a legacy data set to address its physics and chemistry. WISH targeted ~80 sources along th…
CO in Protostars (COPS): -SPIRE Spectroscopy of Embedded Protostars
Yao-Lun Yang, Joel D. Green, Neal J. Evans +13
We present full spectral scans from 200-670m of 26 Class 0+I protostellar sources, obtained with -SPIRE, as part of the "COPS-SPIRE" Open Time program, complementary t…
Origin of warm and hot gas emission from low-mass protostars: Herschel-HIFI observations of CO J=16-15. I. Line profiles, physical conditions, and H2O abundance
L. E. Kristensen, E. F. van Dishoeck, J. C. Mottram +18
(Abridged) Through spectrally unresolved observations of high-J CO transitions, Herschel-PACS has revealed large reservoirs of warm (300 K) and hot (700 K) molecular gas around low…
Survey of cold water lines in protoplanetary disks: indications of systematic volatile depletion
Fujun Du, Edwin Anthony Bergin, Michiel Hogerheijde +11
We performed very deep searches for 2 ground-state water transitions in 13 protoplanetary disks with the HIFI instrument on-board the Herschel Space Observatory, with integration t…
Outflows, infall and evolution of a sample of embedded low-mass protostars. The William Herschel Line Legacy (WILL) survey
J. C. Mottram, E. F. van Dishoeck, L. E. Kristensen +22
[Abridged] We present spectroscopic observations in HO, CO and related species with \textit{Herschel} HIFI and PACS, as well as ground-based follow-up with the JCMT and APEX…
Striations in the Taurus molecular cloud: Kelvin-Helmholtz instability or MHD waves?
M. Heyer, P. F. Goldsmith, U. A. Yildiz +3
The origin of striations aligned along the local magnetic field direction in the translucent envelope of the Taurus molecular cloud is examined with new observations of 12CO and 13…
First detection of gas-phase ammonia in a planet-forming disk
Vachail N. Salinas, Michiel R. Hogerheijde, Edwin A. Bergin +10
Nitrogen chemistry in protoplanetary disks and the freeze-out on dust particles is key to understand the formation of nitrogen bearing species in early solar system analogs. So far…
Observations and modelling of CO and [CI] in disks. First detections of [CI] and constraints on the carbon abundance
M. Kama, S. Bruderer, M. Carney +23
The gas-solid budget of carbon in protoplanetary disks is related to the composition of the cores and atmospheres of the planets forming in them. The key gas-phase carbon carriers…
Classifying the embedded young stellar population in Perseus and Taurus & the LOMASS database
M. T. Carney, U. A. Yıldız, J. C. Mottram +3
Context. The classification of young stellar objects (YSOs) is typically done using the infrared spectral slope or bolometric temperature, but either can result in contamination of…
Herschel Galactic plane survey of [NII] fine structure emission
Paul F. Goldsmith, Umut A. Yıldız, William D. Langer +1
We present the first large scale high angular resolution survey of ionized nitrogen in the Galactic Plane through emission of its two fine structure transitions ([NII]) at 122 m…
Outflow forces in intermediate mass star formation
T. A. van Kempen, M. R. Hogerheijde, E. F. van Dishoeck +22
Intermediate mass protostarsprovide a bridge between theories of low- and high-mass star formation. Emerging molecular outflows can be used to determine the influence of fragmentat…
APEX-CHAMP+ high-J CO observations of low-mass young stellar objects: IV. Mechanical and radiative feedback
Umut A. Yıldız, Lars E. Kristensen, Ewine F. van Dishoeck +14
During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Our aim is to quantify the feedback, m…
Herschel HIFI observations of O toward Orion: special conditions for shock enhanced emission
Jo-Hsin Chen, Paul F. Goldsmith, Serena Viti +18
We report observations of molecular oxygen (O) rotational transitions at 487 GHz, 774 GHz, and 1121 GHz toward Orion Peak A. The O2 lines at 487 GHz and 774 GHz are detected at…
Water distribution in shocked regions of the NGC1333-IRAS4A protostellar outflow
G. Santangelo, B. Nisini, C. Codella +11
We present the study of the H2O spatial distribution at two bright shocked regions along IRAS4A, one of the strongest H2O emitters among the Class 0 outflows. We obtained Herschel-…
The hot core towards the intermediate mass protostar NGC7129 FIRS 2: Chemical similarities with Orion KL
A. Fuente, J. Cernicharo, P. Caselli +8
NGC 7129 FIRS 2 (hereafter FIRS 2) is an intermediate-mass (2 to 8 Msun) protostar located at a distance of 1250 pc. High spatial resolution observations are required to resolve th…
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…
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…
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…
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…