METIS - the Mid-infrared E-ELT Imager and Spectrograph (2008)
Brandl, Bernhard R., Lenzen, Rainer, Pantin, Eric, Glasse, Alistair, Blommaert, Joris, Venema, Lars, ...
METIS, the Mid-infrared ELT Imager and Spectrograph (formerly called MIDIR), is a proposed instrument for the European Extremely Large Telescope (E-ELT), currently undergoing a phase-A study. The...
The fluorine abundance in a Galactic Bulge AGB star measured from CRIRES spectra (2008)
Uttenthaler, Stefan, Lebzelter, Thomas, Aringer, Bernhard, Käufl, Hans-Ulrich, Siebenmorgen, Ralf, Smette, Alain
We present measurements of the fluorine abundance in a Galactic Bulge Asymptotic Giant Branch (AGB) star. The measurements were performed using high resolution K-band spectra obtained with the CRIRES...
Haas, Martin, Siebenmorgen, Ralf, Pantin, Eric, Horst, Hannes, Smette, Alain, Kaufl, Hans-Ulrich, ...
Half of the Seyfert-2 galaxies escaped detection of broad lines in their polarised spectra observed so far. Some authors have suspected that these non-HBLRs contain real Sy2 nuclei without intrinsic...
Reiners, Ansgar, Seifahrt, Andreas, Käufl, Hans Ulrich, Siebenmorgen, Ralf, Smette, Alain
We show individual high resolution spectra of components A, B, and C of the nearby late-M type multiple system LHS 1070. Component A is a mid-M star, B and C are known to have masses at the threshold...
Siebenmorgen, Ralf, Smette, Alain, Käufl, Hans Ulrich, Seifahrt, Andreas, Uttenthaler, Stefan, Bik, Arjan, ...
Unification of 3CR Radio Galaxies and Quasars (2006)
Schulz, Bernhard, Siebenmorgen, Ralf, Haas, Martin, Kruegel, Endrik, Chini, Rolf
We have observed seven powerful FR2 radiogalaxies and seven quasars with the Spitzer IRS. Both samples are comparable in both, redshift range and isotropic 178 Hz luminosity. Both samples are found...
Siebenmorgen, Ralf, Kruegel, Endrik
We provide a library of some 7000 SEDs for starbursts and ultra luminous galaxies (http://www.eso.org/~rsiebenm/sb_models). Its purpose is to quickly obtain estimates of the basic parameters, such as...
Dust in starburst nuclei and ULIRGs: SED models for observers (2006)
Siebenmorgen, Ralf, Kruegel, Endrik
We provide a library of some 7000 SEDs (available at www.eso.org/~rsiebenm) for the nuclei of starburst and ultra luminous galaxies. Its purpose is to quickly obtain estimates of the basic...
Spitzer IRS spectroscopy of 3CR radio galaxies and quasars: Testing the unified schemes (2005)
Haas, Martin, Siebenmorgen, Ralf, Schulz, Bernhard, Kruegel, Endrik, Chini, Rolf
With the Spitzer Space Telescope Infrared Spectrograph (IRS) we have observed seven powerful FR2 radio galaxies and seven quasars. Both samples, the galaxies and the quasars, are comparable in...
Dust Emission by AGN and Starbursts (2005)
Present AGN and starburst models aiming to account for the observed infrared SEDs consider a physical description of the dust and a solution of the radiative transfer problem. MIR spectra obtained at...
Siebenmorgen, Ralf, Efstathiou, Andreas
Present AGN models aiming to account for the observed infrared SEDs consider a physical description of the dust and a solution of the radiative transfer problem. Mid infrared spectra obtained at...
Mid-infrared selection of AGN (2004)
Haas, Martin, Siebenmorgen, Ralf, Leipski, Christian, Ott, Stephan, Cunow, Barbara, Meusinger, Helmut, ...
Since a large fraction of active galactic nuclei (AGN) is missed in common UV-excess surveys and is even hard to find in radio, near-IR and X-ray surveys, we have used a new AGN selection technique...
Hot Dust in Radio-Loud Active Galactic Nuclei (2003)
Freudling, Wolfram, Siebenmorgen, Ralf
We have measured mid-infrared (MIR) fluxes of 3C sources on images taken with ISOCAM onboard the Infrared Space Observatory (ISO). The photometric data were combined with existing photometry at other...
Introduction For each of the four VLT unit telescopes there are at least three instruments. Already since a couple of years in operation are FORS1, FORS2 and ISAAC. By end of next year imaging will...
Infrared space observatory polarimetric imaging of the Egg Nebula (RAFGL 2688) (2002)
Kastner, Joel, Li, Jingqiang, Siebenmorgen, Ralf, Weintraub, David
Also archived in: arXiv: astro-ph/0202034 v1 1 Feb 2002
Infrared space observatory polarimetric imaging of the Egg Nebula (RAFGL 2688) (2002)
Kastner, Joel, Li, Jingqiang, Siebenmorgen, Ralf, Weintraub, David
Also archived in: arXiv: astro-ph/0202034 v1 1 Feb 2002
Infrared Space Observatory Polarimetric Imaging of the Egg Nebula (RAFGL 2688) (2002)
Kastner, Joel H., Li, Jingqiang, Siebenmorgen, Ralf, Weintraub, David A.
We present polarimetric imaging of the protoplanetary nebula RAFGL 2688 obtained at 4.5 microns with the Infrared Space Observatory (ISO). We have deconvolved the images to remove the signature of...
Galaxies in the infrared (2000)
The mid infrared spectra of the starbursts show the 9.7$\mu m$ silicate absorption feature and strong mid infrared emission bands centered at 6.2, 7.7, and 11.3 $\mu$m. Illustrative models of the...
ISO observations of obscured Asymptotic Giant Branch stars in the Large Magellanic Cloud (1999)
Norman R. Trams, Albert A. Zijlstra, Cecile Loup, Patricia A. Whitelock, Ralf Siebenmorgen, A. Heske, ...
. We present ISO photometric and spectroscopic observations of a sample of 57 bright Asymptotic Giant Branch stars and red supergiants in the Large Magellanic Cloud, selected on the basis of IRAS...
IRAS04496Gamma6958: A luminous carbon star with silicate dust in the Large Magellanic Cloud (1999)
Norman R. Trams, Albert A. Zijlstra, Cecile Loup, Patricia A. Whitelock, ...
. We describe ISO observations of the obscured Asymptotic Giant Branch (AGB) star IRAS04496Gamma6958 in the Large Magellanic Cloud (LMC). This star has been classified as a carbon star. Our new...
ISO observations of obscured Asymptotic Giant Branch stars in the Large Magellanic Cloud (1999)
Trams, Norman R., Van Loon, Jacco Th., Zijlstra, Albert A., Loup, Cecile, Whitelock, Patricia A., ...
We present ISO photometric and spectroscopic observations of a sample of 57 bright Asymptotic Giant Branch stars and red supergiants in the Large Magellanic Cloud, selected on the basis of IRAS...
IRAS04496-6958: A luminous carbon star with silicate dust in the Large Magellanic Cloud (1999)
Trams, Norman R., Van Loon, Jacco Th., Zijlstra, Albert A., Loup, Cecile, Groenewegen, M. A. T., ...
We describe ISO observations of the obscured Asymptotic Giant Branch (AGB) star IRAS04496-6958 in the Large Magellanic Cloud (LMC). This star has been classified as a carbon star. Our new ISOCAM CVF...
The Past and Present Infrared Spectrum of BD+30 3639 (1993)
Zijlstra, Albert A., Siebenmorgen, Ralf
We present a radiative-transfer calculation which reproduces the infrared spectrum of the planetary nebula BD+30$^{\circ}$3639, fitting both the spectral energy distribution and the spatial extent at...