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100 papers · 1 filter
Identification of molecular complexes in M81
N. Brouillet, M. Kaufman, F. Combes +2
We report about high spatial resolution observations made with the IRAM interferometer of the CO emission from a 1.1x1.1 kpc plane-of-sky field on a spiral arm of Messier 81. With…
A method for optimal image subtraction
C. Alard, R. H. Lupton
We present a new method designed for optimal subtraction of two images with different seeing. Using image subtraction appears to be essential for the full analysis of the microlens…
The broad-band X-ray spectrum of RE 0751+14 (PQ Gem)
T. Belloni, G. Matt, D. De Martino +7
RE 0751+14 is a member of the class of Soft Intermediate Polars. Unlike classical Intermediate Polars, they are characterized by the presence of a soft component in their X-ray spe…
Disk Instability Models
Jean-Pierre Lasota, Jean-Marie Hameury
We review various aspects of disk instability models. We discuss problems and difficulties and present ways that have been suggested to solve them.
Performance of the CFHT Adaptive Optics Bonnette
F. Rigaut, D. Salmon, R. Arsenault +10
Extensive results from the commissioning phase of PUEO, the adaptive optics instrument adaptor for the Canada-France-Hawaii telescope, are presented and discussed. Analyses of more…
Molecular absorption lines at high redshift
Tommy Wiklind, Francoise Combes
The four known molecular absorption line systems at redshifts z0.25--0.89 are discussed. Two of the systems originate in the galaxy hosting the `background' AGN, while in two ca…