J. Jørgensen

Publications308
h-index56
Citations10,466
Highly Influential Citations1,003
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The Spitzer c2d legacy results: star-formation rates and efficiencies; evolution and lifetimes
The c2d Spitzer Legacy project obtained images and photometry with both IRAC and MIPS instruments for five large, nearby molecular clouds. Three of the clouds were also mapped in dust continuum…
Testing grain-surface chemistry in massive hot-core regions
Aims. We study the chemical origin of a set of complex organic molecules thought to be produced by grain surface chemistry in high mass young stellar objects (YSOs). Methods. A partial submillimeter…
The c2d Spitzer spectroscopic survey of ices around low-mass young stellar objects. I. H2O and the 5-8 mu m bands
To study the physical and chemical evolution of ices in solar-mass systems, a spectral survey is conducted of a sample of 41 low-luminosity YSOs (L ~ 0.1 - 10 L☉) using 3 - 38 μm Spitzer and…
Physical structure and CO abundance of low-mass protostellar envelopes
We present 1D radiative transfer modelling of the envelopes of a sample of 18 low-mass protostars and pre-stellar cores with the aim of setting up realistic physical models, for use in a chemical…
Does IRAS 16293–2422 have a hot core? Chemical inventory and abundance changes in its protostellar environment
A detailed radiative transfer analysis of the observed continuum and molecular line emission toward the deeply embedded young stellar object IRAS 16293-2422 is performed. Accurate molecular…
PROSAC: a submillimeter array survey of low-mass protostars - II. The mass evolution of envelopes, disks, and stars from the class 0 through I stages
Context. The key question about early protostellar evolution is how matter is accreted from the large-scale molecular cloud, through the circumstellar disk onto the central star. Aims. We constrain…
The Spitzer c2d survey of large, nearby, interstellar clouds. III. Perseus observed with IRAC
We present observations of 3.86 deg to the 2nd of the Perseus molecular cloud complex with the Spitzer Space Telescope Infrared Array Camera (IRAC). The maps show strong extended emission arising…
The Spitzer c2d Survey of Large, Nearby, Insterstellar Clouds. II. Serpens Observed with IRAC
We present maps of 0.89?deg2 of the Serpens dark cloud at 3.6, 4.5, 5.8, and 8.0??m observed with the Spitzer Space Telescope Infrared Array Camera (IRAC). We discuss in detail the data processing…
Molecular inventories and chemical evolution of low-mass protostellar envelopes
This paper presents the first substantial study of the chemistry of the envelopes around a sample of 18 low-mass pre- and protostellar objects for which physical properties have previously been…
DETECTION OF THE SIMPLEST SUGAR, GLYCOLALDEHYDE, IN A SOLAR-TYPE PROTOSTAR WITH ALMA
Glycolaldehyde (HCOCH2OH) is the simplest sugar and an important intermediate in the path toward forming more complex biologically relevant molecules. In this Letter we present the first detection of…
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