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Infrared emission in radio galaxy NGC 4261
I. M. van Bemmel, C. P. Dullemond, M. Chiaberge +1
We have analyzed the total and nuclear SED for NGC 4261 and find that the dominant process for the mid- and far-infrared emission in this object is non-thermal emission from the ac…
Millimeter observations and modeling of the AB Aurigae system
D. Semenov, Ya. Pavlyuchenkov, K. Schreyer +3
(Abriged) We present the results of millimeter observations and a suitable chemical and radiative transfer model of the AB Aur (HD 31293) circumstellar disk and surrounding envelop…
Ices in the edge-on disk CRBR 2422.8-3423: Spitzer spectroscopy and Monte Carlo radiative transfer modeling
Klaus M. Pontoppidan, Cornelis P. Dullemond, Ewine F. van Dishoeck +5
We present 5.2-37.2 micron spectroscopy of the edge-on circumstellar disk CRBR 2422.8-3423 obtained using the InfraRed Spectrograph (IRS) of the Spitzer Space Telescope. The IRS sp…
A submillimeter exponential disk in M~51: evidence for an extended cold dust disk
R. Meijerink, R. P. J. Tilanus, C. P. Dullemond +2
A 850 micron map of the interacting spiral galaxy M51 shows well-defined spiral arms, closely resembling the structures seen in CO and HI emission. However, most of the 850 micron…
The gas temperature in the surface layers of protoplanetary disks
I. Kamp, C. P. Dullemond
Models for the structure of protoplanetary disks have so far been based on the assumption that the gas and the dust temperature are equal. The gas temperature, an essential ingredi…
[O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars
M. E. van den Ancker, B. Acke, C. P. Dullemond
We present high spectral-resolution optical spectra of 49 Herbig Ae/Be stars in a search for the [O I] 6300.2 A line. The vast majority of the stars in our sample show narrow (FWHM…