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19922026
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341 papers · 1 filter

astro-ph2008★ 53 cited

Shape parameters of Galactic open clusters

N. V. Kharchenko, P. Berczik, M. I. Petrov +4

(abridged) In this paper we derive observed and modelled shape parameters (apparent ellipticity and orientation of the ellipse) of 650 Galactic open clusters identified in the ASCC…

astro-ph2008★ 17 cited

Discovery of very low amplitude 9-minute multiperiodic pulsations in the magnetic Ap star HD 75445

O. Kochukhov, S. Bagnulo, G. Lo Curto +1

We present our discovery of pulsational radial-velocity variations in the cool Ap star HD 75445, an object spectroscopically similar to the bright, rapidly-oscillating Ap (roAp) st…

astro-ph2008★ 20 cited

MOST photometry of the enigmatic PMS pulsator HD 142666

K. Zwintz, T. Kallinger, D. B. Guenther +11

We present precise photometry of the pulsating Herbig Ae star HD 142666 obtained in two consecutive years with the MOST (Microvariability & Oscilations of STars) satellite. Previou…

astro-ph2008★ 6 cited

On the morphology of the compact dust shell in the symbiotic system HM Sagittae

Stéphane Sacuto, Olivier Chesneau

The symbiotic system HM Sagittae consists of a Mira star and a secondary White Dwarf component. The dust content of the system was severely affected by the nova outburst in 1975, w…

astro-ph2008★ 48 cited

Toward mode selection in Delta Scuti stars: Regularities in observed and theoretical frequency spectra

M. Breger, P. Lenz, A. A. Pamyatnykh

Only a fraction of the theoretically predicted nonradial pulsation modes have so far been observed in Delta Scuti stars. Nevertheless, the large number of frequencies detected in r…

astro-ph2008★ 4 cited

Modeling the Local Warm/Hot Bubble

Dieter Breitschwerdt, Miguel A. de Avillez, Verena Baumgartner

In this paper we review the modeling of the Local Bubble (LB) with special emphasis on the progress we have made since the last major conference "The Local Bubble and Beyond (I)" h…