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822 papers · 1 filter
FIRST "Winged" and X-shaped Radio Source Candidates: II. New Redshifts
C. C. Cheung, Stephen E. Healey, Hermine Landt +2
We report optical spectroscopic observations of X-shaped radio sources with the Hobby-Eberly Telescope and Multiple-Mirror Telescope, focused on the sample of candidates from the F…
Stellar Population Models and Individual Element Abundances II: Stellar Spectra and Integrated Light Models
H. -c. Lee, G. Worthey, A. Dotter +7
The first paper in this series explored the effects of altering the chemical mixture of the stellar population on an element by element basis on stellar evolutionary tracks and iso…
Study of the stellar line-strength indices and kinematics along bars
I. Perez, P. Sanchez-Blazquez, A. Zurita
This is the first paper of a series aimed to understand the formation and evolution of bars in early-type spirals and their influence in the evolution of the galaxy. Optical long-s…
The rotation and coma profiles of comet C/2004 Q2 (Machholz)
Maarten Reyniers, Pieter Degroote, Dennis Bodewits +2
Aims. Rotation periods of cometary nuclei are scarce, though important when studying the nature and origin of these objects. Our aim is to derive a rotation period for the nucleus…
A spatially resolved study of photoelectric heating and [CII] cooling in the LMC
D. Rubin, S. Hony, S. C. Madden +20
(abridged) We study photoelectric heating throughout the Large Magellanic Cloud. We quantify the importance of the [CII] cooling line and the photoelectric heating process of vario…
Infrared Emission by Dust Around lambda Bootis Stars: Debris Disks or Thermally Emitting Nebulae?
J. R. Martínez-Galarza, I. Kamp, K. Y. L. Su +3
We present a model that describes stellar infrared excesses due to heating of the interstellar (IS) dust by a hot star passing through a diffuse IS cloud. This model is applied to…