Search Publications
Photometric Survey of Stellar Clusters in the Outer Part of M33. II. Analysis of HST/ACS Images
Kaluzny, J.; Zloczewski, K.
We have used deep ACS/WFC images of M33 to check the nature of extended objects detected by the ground based survey of Zloczewski etal (2008). A total of 24 candidates turned out to be genuine compact stellar clusters. In addition we detected 91 new clusters. Equatorial coordinates, integrated magnitudes and angular sizes are listed for all 115 ob…
An Unusual Eclipsing Blue Straggler V8-NGC 6752
Thompson, I. B.; Kaluzny, J.; Rozyczka, M. +1 more
We report the analysis of a binary blue straggler in NGC 6752 with a short orbital period of 0.315 d and a W UMA-type light curve. We use photometric data spanning 13 years to place limits on the mass ratio (0.15≤q≤0.35), luminosity ratio (L1/L2≈4.0) and the ratio of the radii of the components (r1/r2≈2.…
Interstellar Medium in the M43 Nebula
Gnaciñski, P.
We present a list of interstellar absorption lines in the direction of HD 37061 in the M43 nebula. Some of the absorption lines arise from atomic excited levels that are uncommon in interstellar clouds. The excited levels of FeII are populated by fluorescence. We found a large number of H2 molecular absorption lines arising from vibrati…
The Period and the Cause of Variability of the Magnetic Ap Star V473 Tauri
Jerzykiewicz, M.
The ground based UBV observations and Hipparcos Hp magnitudes of this well known magnetic variable are analyzed. The period of the star's light variation is improved. The improved value, accounting for the available photometric data from the 1963--1964 Lowell observations of Rakosch to the 1990--1993 Hp magnitudes, is equal to 1.4068541±0.0000029 …
Spectroscopic Study of Kepler Asteroseismic Targets
Frasca, A.; Latham, D. W.; Jerzykiewicz, M. +1 more
Reported are spectroscopic observations of 15 candidates for Kepler primary asteroseismic targets and 14 other stars in the Kepler field, carried out at three observatories. For all these stars, the radial velocities, effective temperature, surface gravity, metallicity, and the projected rotational velocity are derived from two separate sets of da…
SX Phoenicis Stars in the Globular Cluster M 92
Kopacki, G.
We present results of a search for SX Phe stars in the globular cluster M 92. In photometric reductions, we used the image subtraction method supplemented with a procedure of searching for short-period variables, based on the examination of each pixel in the CCD frame. In addition to two SX Phe stars already known in the cluster, we have found fiv…
Frequency of Hot Jupiters and Very Hot Jupiters from the OGLE-III Transit Surveys toward the Galactic Bulge and Carina
Udalski, A.; Gould, A.; Gaudi, B. S. +1 more
We derive the frequencies of hot Jupiters (HJs) with 3-5 day periods and very hot Jupiters (VHJs) with 1-3 day periods by comparing the planets actually detected in the OGLE-III survey with those predicted by our models. The models are constructed following Gould and Morgan (2003) by populating the line of sight with stars drawn from the Hipparcos…
Cluster AgeS Experiment (CASE): Dwarf Novae and a Probable Microlensing Event in the Globular Cluster M22
Pietrukowicz, P.; Thompson, I. B.; Schwarzenberg-Czerny, A. +4 more
We report the identification of a new cataclysmic variable (denoted as CV2) and a probable microlensing event in the field of the globular cluster M22. Two outbursts were observed for CV2. During one of them superhumps with P_sh=0.0887 d were present in the light curve. CV2 has an X-ray counterpart detected by XMM-Newton. A very likely microlensin…
SX Phoenicis Stars in the Globular Cluster M 13
Kopacki, G.
We present results of the search for SX Phe stars in the globular cluster M 13. In photometric reductions we used the image subtraction method supplemented with procedure of searching for short-period variable stars, based on the examination of each pixel in the CCD frames. We illustrate also the ability of this approach to find variability with s…
Estimation of Projection Effect of CMEs from the Onset Time of the Shock-Associated Type III Radio Burst
Gopalswamy, N.; Michalek, G.; Yashiro, S.
We present a new possibility to estimate the projection effects on coronal mass ejection (CME) measurements. It is well known that coronagraphic observations of CMEs are subject to projection effects. Fortunately, the WIND/WAVES observations of type III radio bursts associated with shock waves are free from projection effects. We assume that (1) h…