Dense and warm molecular gas in the envelopes and outflows of southern low-mass protostars (2009)
Van Kempen, T. A., Van Dishoeck, E. F., Hogerheijde, M. R., Guesten, R.
Observations of dense molecular gas lie at the basis of our understanding of the density and temperature structure of protostellar envelopes and molecular outflows. We aim to characterize the...
Extremely high velocity gas from the massive YSOs in IRAS 17233-3606 (2009)
Leurini, S., Codella, C., Zapata, L. A., Belloche, A., Stanke, T., Wyrowski, F., ...
Molecular outflows from high-mass young stellar objects provide an excellent way to study the star formation process, and investigate if they are scaled-up versions of their low-mass counterparts. We...
Van Kempen, T. A., Van Dishoeck, E. F., Guesten, R., Kristensen, L. E., Schilke, P., Hogerheijde, M. R., ...
The origin and heating mechanisms of warm (50
Van Kempen, T. A., Van Dishoeck, E. F., Guesten, R., Kristensen, L. E., Schilke, P., Hogerheijde, M. R., ...
AIMS Our aim is to characterize the size, mass, density and temperature profiles of the protostellar envelope of HH~46 IRS 1 and its surrounding cloud material as well as the effect the outflow has...
The Large APEX Bolometer Camera LABOCA (2009)
Siringo, G., Kreysa, E., Kovacs, A., Schuller, F., Weiss, A., Esch, W., ...
The Large APEX Bolometer Camera, LABOCA, has been commissioned for operation as a new facility instrument t the Atacama Pathfinder Experiment 12m submillimeter telescope. This new 295-bolometer total...
Emprechtinger, M., Wiedner, M. C., Simon, R., Wieching, G., Volgenau, N. H., Bielau, F., ...
NGC 2024, a sites of massive star formation, have complex internal structures caused by cal heating by young stars, outflows, and stellar winds. These complex cloud structures lead to intricate...
Millimetron—a large Russian-European submillimeter space observatory (2009)
Wild, Wolfgang, Kardashev, Nikolay S., Likhachev, S. F., Babakin, N. G., Arkhipov, V. Y., Vinogradov, I. S., ...
Menten, K. M., Guesten, R., Leurini, S., Thorwirth, S., Henkel, C., Klein, B., ...
Using the Atacama Pathfinder Experiment (APEX) telescope we have detected the rotational ground-state transitions of ortho-ammonia and ortho-water toward the redshift ~0.89 absorbing galaxy in the...
LABOCA observations of nearby, active galaxies (2008)
Weiss, A., Kovacs, A., Guesten, R., Menten, K. M., Schuller, F., Siringo, G., ...
We present large scale 870 micron maps of the nearby starburst galaxies NGC253, NGC4945 and the nearest giant elliptical radio galaxy Centaurus A (NGC 5128) obtained with the newly commissioned Large...
Sunyaev-Zel'dovich Effect Observations of the Bullet Cluster (1E 0657-56) with APEX-SZ (2008)
Halverson, N. W., Lanting, T., Ade, P. A. R., Basu, K., Bender, A. N., Benson, B. A., ...
We present observations of the Sunyaev-Zel'dovich effect (SZE) in the Bullet cluster (1E 0657-56) using the APEX-SZ instrument at 150 GHz with a resolution of 1 arcmin. The main results are maps of...
Leurini, S., Hieret, C., Thorwirth, S., Wyrowski, F., Schilke, P., Menten, K. M., ...
We present molecular line observations of the massive star forming region IRAS 17233-3606 aimed at studying the molecular core associated with the source. The observations were made using the Atacama...
Molecular excitation in the Eagle nebula's fingers (2006)
Schuller, F., Leurini, S., Hieret, C., Menten, K. M., Philipp, S. D., Guesten, R., ...
Context: The M16 nebula is a relatively nearby Hii region, powered by O stars from the open cluster NGC 6611, which borders to a Giant Molecular Cloud. Radiation from these hot stars has sculpted...
Detection of H2D+ in a massive prestellar core in Orion B (2006)
Harju, J., Haikala, L. K., Lehtinen, K., Juvela, M., Mattila, K., Miettinen, O., ...
Aims. The purpose of this study is to examine the prediction that the deuterated H3+ ion, H2D+, can be found exclusively in the coldest regions of molecular cloud cores. This is also a feasibility...
Submillimeter vibrationally excited water emission from the peculiar red supergiant VY CMa (2006)
Menten, K. M., Philipp, S. D., Guesten, R., Alcolea, J., Polehampton, E. T., Bruenken, S.
Vibrationally excited emission from the SiO and H2O molecules probes the innermost circumstellar envelopes of oxygen-rich red giant and supergiant stars. VY CMa is the most prolific known stellar...
The high velocity outflow in NGC6334I (2006)
Leurini, S., Schilke, P., Parise, B., Wyrowski, F., Guesten, R., Philipp, S.
We observed the high velocity outflow originating from NGC6334I in several CO transitions with the APEX telescope, with the goal of deriving the physical parameters of the gas. Using an LVG analysis,...
Revealing the environs of the remarkable southern hot core G327.3-0.6 (2006)
Wyrowski, F., Menten, K. M., Schilke, P., Thorwirth, S., Guesten, R., Bergman, P.
We present a submm study of the massive hot core G327.3-0.6 that constrains its physical parameters and environment. The APEX telescope was used to image CO and N2H+ emission, to observe lines from...
Mid- and high-J CO observations towards UCHIIs (2006)
Wyrowski, F., Heyminck, S., Guesten, R., Menten, K. M.
A study of 12 ultracompact HII regions was conducted to probe the physical conditions and kinematics in the inner envelopes of the molecular clumps harboring them. The APEX telescope was used to...
Probable detection of H2D+ in the starless core Barnard 68 (2006)
Hogerheijde, M. R., Caselli, P., Emprechtinger, M., Alves, J., Belloche, A., ...
The presence of H2D+ in dense cloud cores underlies ion-molecule reactions that strongly enhance the deuterium fractionation of many molecular species. We determine the H2D+ abundance in one starless...
Warm Molecular Gas in the Outflow and Envelope of IRAS 12496-7650 (DK Cha) (2006)
Van Kempen, T. A., Hogerheijde, M. R., Van Dishoeck, E. F., Guesten, R., Schilke, P.
Aims:To obtain insight into the physical structure of the warm gas in the inner envelope of protostars and the interaction with the outflow. Methods: Sub-millimeter observations of 12CO, 13CO and/or...
The evolutionary state of the southern dense core Cha-MMS1 (2006)
Belloche, A., Parise, B., Schilke, P., Leurini, S., Guesten, R., ...
Aims: Our goal is to set constraints on the evolutionary state of the dense core Cha-MMS1 in the Chamaeleon I molecular cloud. Methods: We analyze molecular line observations carried out with the new...
CO and CH3OH observations of the BHR71 outflows with APEX (2006)
Parise, B., Belloche, A., Leurini, S., Schilke, P., Wyrowski, F., Guesten, R.
Context : Highly-collimated outflows are believed to be the earliest stage in outflow evolution, so their study is essential for understanding the processes driving outflows. The BHR71 Bok globule is...
The Local Oscillator System for the Heterodyne Instrument for FIRST (HIFI) (2004)
Pearson, J., Guesten, R., Klein, T., Whyborn, N.
The Heterodyne Instrument for FIRST (HIFI) is comprised of five SIS receiver channels covering 480-1250 GHz and two HEB receiver channels covering parts of 1410-1910 GHz and 2400-2700 GHz.
Galactic Center Molecular Clouds (2004)
At a distance of 8 kpc only, the center of the Galaxy provides a unique testbed for studies about the physics of the interstellar medium and star formation in the nuclei of galaxies. Since it shares...