126 citations · 801 across the 18 of their papers we have counts for
18 papers
Oscillations in Gas-grain Astrochemical Kinetics
Gwenaëlle Dufour, Steven B. Charnley, Johan E. Lindberg
We have studied gas-grain chemical models of interstellar clouds to search for nonlinear dynamical evolution. A prescription is given for producing oscillatory solutions when a bis…
V838 Mon: A slow waking up of Sleeping Beauty?
T. Liimets, I. Kolka, M. Kraus +15
Context. V838 Monocerotis is a peculiar binary that underwent an immense stellar explosion in 2002, leaving behind an expanding cool supergiant and a hot B3V companion. Five years…
The Herschel-PACS legacy of low-mass protostars: Properties of warm and hot gas and its origin in far-UV illuminated shocks
Agata Karska, Michael J. Kaufman, Lars E. Kristensen +11
Recent observations from Herschel allow the identification of important mechanisms responsible for the heating of gas surrounding low-mass protostars and its subsequent cooling in…
Very Large Array Ammonia Observations of the HH 111/HH 121 Protostellar System: a Detection of a New Source With a Peculiar Chemistry
Marta Sewilo, Jennifer Wiseman, Remy Indebetouw +4
We present the results of Very Large Array NH and observations of the HH 111/HH 121 protostellar system. HH 111, with a spectacular collimated optical j…
Externally heated protostellar cores in the Ophiuchus star-forming region
Johan E. Lindberg, Steven B. Charnley, Jes K. Jørgensen +2
We present APEX 218 GHz observations of molecular emission in a complete sample of embedded protostars in the Ophiuchus star-forming region. To study the physical properties of the…
On the origin of CH and CHOH in protostellar envelopes
Johan E. Lindberg, Steven B. Charnley, Martin A. Cordiner
The formation pathways of different types of organic molecules in protostellar envelopes and other regions of star formation are subjects of intense current interest. We here prese…
Water around IRAS15398-3359 observed with ALMA
P. Bjerkeli, J. K. Jørgensen, E. A. Bergin +9
How protostars accrete mass is one of the fundamental problems of star formation. High column densities and complex kinematical structures make direct observations challenging and…
Probing the effects of external irradiation on low-mass protostars through unbiased line surveys
Johan E. Lindberg, Jes K. Jørgensen, Yoshimasa Watanabe +3
(abridged) Context: The envelopes of molecular gas around embedded low-mass protostars show different chemistries, which can be used to trace their formation history and physical c…
A Substellar-Mass Protostar and its Outflow of IRAS 15398-3359 Revealed by Subarcsecond-Resolution Observations of HCO and CCH
Yoko Oya, Nami Sakai, Takeshi Sakai +7
Sub-arcsecond () images of HCO and CCH line emission have been obtained in the mm band toward the low-mass protostar IRAS 15398-3359 in the Lupus 1 cl…
ALMA observations of the kinematics and chemistry of disc formation
Johan E. Lindberg, Jes K. Jørgensen, Christian Brinch +6
Context: The R CrA cloud hosts a handful of Class 0/I low-mass young stellar objects. The chemistry and physics at scales AU in this cloud are dominated by the irradiation f…
A recent accretion burst in the low-mass protostar IRAS 15398-3359: ALMA imaging of its related chemistry
Jes K. Jorgensen, Ruud Visser, Nami Sakai +8
Low-mass protostars have been suggested to show highly variable accretion rates through-out their evolution. Such changes in accretion, and related heating of their ambient envelop…
Warm gas towards young stellar objects in Corona Australis - Herschel/PACS observations from the DIGIT key programme
Johan E. Lindberg, Jes K. Jørgensen, Joel D. Green +5
The effects of external irradiation on the chemistry and physics in the protostellar envelope around low-mass young stellar objects are poorly understood. The Corona Australis star…
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…
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…
Strong irradiation of protostellar cores in Corona Australis
J. E. Lindberg, J. K. Jørgensen
The importance of the physical environment in the evolution of newly formed low-mass stars remains an open question. In particular, radiation from nearby more massive stars may aff…
An Unbiased Spectral Line Survey toward R CrA IRS7B in the 345 GHz Window with ASTE
Yoshimasa Watanabe, Nami Sakai, Johan E. Lindberg +3
We have conducted a spectral line survey in the 332 - 364 GHz region with the ASTE 10 m telescope toward R CrA IRS7B, a low-mass protostar in the Class 0 or Class 0/I transitional…
First Kepler results on compact pulsators VI. Targets in the final half of the survey phase
R. H. Østensen, R. Silvotti, S. Charpinet +29
We present results from the final six months of a survey to search for pulsations in white dwarfs and hot subdwarf stars with the Kepler spacecraft. Spectroscopic observations are…
Water-ice driven activity on Main-Belt Comet P/2010 A2 (LINEAR) ?
F. Moreno, J. Licandro, G. -P. Tozzi +8
The dust ejecta of Main-Belt Comet P/2010 A2 (LINEAR) have been observed with several telescopes at the at the Observatorio del Roque de los Muchachos on La Palma, Spain. Applicati…