6 papers · 1 filter
NLTE Spectral Analysis of Central Stars of PNe Interacting with the ISM
T. Rauch, F. Kerber, E. Furlan +1
The analysis of Planetary Nebulae (PNe) provides a tool to investigate the properties of their exciting central stars (CSPN) at the moment of the PN ejection as well as on the prop…
Photometric Calibrations for the SIRTF Infrared Spectrograph
P. W. Morris, V. Charmandaris, T. Herter +3
The SIRTF InfraRed Spectrograph (IRS) is faced with many of the same calibration challenges that were experienced in the ISO SWS calibration program, owing to similar wavelength co…
The Mid-Infrared Spectra of Interacting Galaxies: From ISO to SIRTF
V. Charmandaris, O. Laurent, I. F. Mirabel +2
We present mid-infrared (5--16micron) images and spectra of a sequence of interacting galaxies, observed by ISOCAM. The galaxies were selected as being at progressive stages in the…
First Detection of Molecular Gas in the Shells of CenA
V. Charmandaris, F. Combes, J. M. van der Hulst
Shells are faint arc-like stellar structures, which have been observed around early type galaxies and are thought to be the result of an interaction. HI gas has recently been detec…
Search for molecular gas in HVCs through HCO+ absorption
F. Combes, V. Charmandaris
High-Velocity Clouds (HVCs) have radial velocities that cannot be explained by the global Galactic rotation; their distances remain mostly unknown, and their true nature and origin…
Smoke in the "Smoke Rings": ISO Observations of Dust in Collisional Ring Galaxies
P. N. Appleton, V. Charmandaris, C. Horellou +2
Collisional ring galaxies probably result from a head-on collision between a compact companion galaxy and a gas-rich disk system. We present a review of the discovery of warm dust…