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Synergy of multifrequency studies from observations of NGC6334I
Andreas Seifahrt, Sven Thorwirth, Henrik Beuther +5
We combine multifrequency observations from the millimeter to near infrared wavelengths that demonstrate the spatial distributions of H2, CO, and NH3 emission, which are all manife…
Submillimeter water and ammonia absorption by the peculiar z~0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system
K. M. Menten, R. Guesten, S. Leurini +5
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 absorbi…
Molecules in G1.6-0.025 - 'Hot' Chemistry in the Absence of Star Formation at the Periphery of the Galactic Center Region
Karl M. Menten, Robert W. Wilson, Silvia Leurini +1
We present molecular line mapping of the Giant Molecular Cloud G1.6-0.025, which is located at the high longitude end of the Central Molecular Zone of our Galaxy. We assess the deg…
Detection of 6.7 GHz methanol absorption towards hot corinos
J. D. Pandian, S. Leurini, K. M. Menten +2
Methanol masers at 6.7 GHz have been found exclusively towards high-mass star forming regions. Recently, some Class 0 protostars have been found to display conditions similar to wh…
Unveiling a Compact Cluster of Massive and Young Stars in IRAS 17233-3606
Luis A. Zapata, Silvia Leurini, Karl M. Menten +3
We have analyzed sensitive high spatial resolution archival radio continuum data at 1.3, 2.0, 3.6 and 6.0 cm as well as the H2O maser molecular line data obtained using the Very La…
High mass star formation in the IRAS 17233-3606 region: a new nearby and bright hot core in the southern sky
S. Leurini, C. Hieret, S. Thorwirth +5
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 mad…
Spectral imaging of the Sagittarius B2 region in multiple 3-mm molecular lines with the Mopra telescope
P. A. Jones, M. G. Burton, M. R. Cunningham +6
Using the Mopra telescope, we have undertaken a 3-mm spectral-line imaging survey of a 5 x 5 arcmin^2 area around Sgr B2. We covered almost the complete spectral the range from 81.…
Multi-line (sub)millimetre observations of the high-mass proto cluster IRAS 05358+3543
S. Leurini, H. Beuther, P. Schilke +3
Since most high- and intermediate-mass protostars are at great distance and form in clusters, high linear resolution observations are needed to investigate their physical propertie…
Millimeter wave spectral line surveys and line mapping studies of NGC6334I and I(N)
S. Thorwirth, A. J. Walsh, F. Wyrowski +8
NGC6334I and I(N) have been observed with the Swedish-ESO Submillimetre Telescope, SEST, at wavelengths of 3, 2, and 1.3 mm. Especially NGC6334 I shows rich emission from many diff…
APEX survey of southern high mass star forming regions
C. Hieret, S. Leurini, K. M. Menten +3
A systematic study of a large sample of sources, covering a wide range in galactocentric distances, masses and luminosities, is a fast and efficient way of obtaining a good overvie…
Dust and gas emission in the prototypical hot core G29.96-0.02 at sub-arcsecond resolution
H. Beuther, Q. Zhang, E. A. Bergin +3
Aiming at a better understand of the physical and chemical processes in the hot molecular core stage of high-mass star formation, we observed the prototypical hot core G29.96-0.02…
Interferometric multi-wavelength (sub)millimeter continuum study of the young high-mass protocluster IRAS05358+3543
H. Beuther, S. Leurini, P. Schilke +3
The young massive star-forming region IRAS05358+3543 was observed at high-spatial resolution in the continuum emission at 3.1 and 1.2mm with the Plateau de Bure Interferometer, and…
APEX 1 mm line survey of the Orion Bar
S. Leurini, R. Rolffs, S. Thorwirth +8
Unbiased molecular line surveys are a powerful tool for analyzing the physical and chemical parameters of astronomical objects and are the only means for obtaining a complete view…
The high velocity outflow in NGC6334I
S. Leurini, P. Schilke, B. Parise +3
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. Usi…
Molecular excitation in the Eagle nebula's fingers
F. Schuller, S. Leurini, C. Hieret +5
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 sta…
The evolutionary state of the southern dense core Cha-MMS1
A. Belloche, B. Parise, F. F. S. van der Tak +4
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 carri…
CO and CH3OH observations of the BHR71 outflows with APEX
B. Parise, A. Belloche, S. Leurini +3
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 B…
Synchrotron emission from the T Tauri binary system V773 Tau A
M. Massi, J. Forbrich, K. M. Menten +4
The pre-main sequence binary system V773 Tau A shows remarkable flaring activity around periastron passage. Here, we present the observation of such a flare at a wavelength of 3 mm…
Methanol: a diagnostic tool for high-mass star-forming regions
S. Leurini, P. Schilke, K. M. Menten +3
We here present an innovative technique to handle the problem of deriving physical parameters from observed multi-line spectra of methanol, based on the simultaneous fit of all the…