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17 papers · 1 filter
A study of the magnetic field in the photospheric and circumstellar components of Herbig Ae stars
S. Hubrig, M. A. Pogodin, R. V. Yudin +2
We intend to investigate separately the photospheric and circumstellar (CS) magnetic field components in seven Herbig Ae stars. The study is based on low-resolution (R ~ 2000 and 4…
Early spectral evolution of Nova Sgr 2004 (V5114 Sgr)
A. Ederoclite, E. Mason, M. Della Valle +15
We present optical and near-infrared spectral evolution of the Galactic nova V5114 Sgr (2004) during few months after the outburst. We use multi-band photometry and line intensitie…
The Mass of the Black Hole in the Seyfert 1 Galaxy NGC 4593 from Reverberation Mapping
Kelly D. Denney, Misty C. Bentz, Bradley M. Peterson +15
We present new observations leading to an improved black hole mass estimate for the Seyfert 1 galaxy NGC 4593 as part of a reverberation-mapping campaign conducted at the MDM Obser…
Velocity Shear of the Thick Disk from SPM3 Proper Motions at the South Galactic Pole
T. M. Girard, V. I. Korchagin, D. I. Casetti-Dinescu +3
The kinematical properties of the Galactic Thick Disk are studied using absolute proper motions from the SPM3 Catalog and 2MASS near-infrared photometry for a sample of ~1200 red g…
A Reverberation-Based Mass for the Central Black Hole in NGC 4151
Misty C. Bentz, Kelly D. Denney, Edward M. Cackett +15
We have undertaken a new ground-based monitoring campaign to improve the estimates of the mass of the central black hole in NGC 4151. We measure the lag time of the broad H beta li…
The new pre-cataclysmic binary PG 2200+085
V. Shimansky, N. A. Sakhibullin, I. Bikmaev +4
We present the results of spectroscopic-- and orbit--sampled photometric observations of the faint UV-excess object PG 2200+085. The optical CCD photometry observations of this obj…