Stellar Astrophysics - A Tribute to Helmut A. Abt Book

	Preface
	List of Participants
	Some Questions of Gamma-Ray Bursts	3
	Timescale Spectra in High Energy Astrophysics	11
	Gamma-ray Pulsars in Gould Belt and Unidentified Gamma-Ray Sources in Medium Latitudes	19
	Magnetars and Pulsars: A Missing Link	27
	Emission Processes of High-Energy Gamma Rays from Gamma-Ray Bursts	35
	Beaming Effects in Gamma-Ray Bursts	41
	GRB Opening Angle and Space Density Distribution determined from the GRB Intensity Distribution	49
	Distance Determination of Variable Galactic Sources	55
	Phase Transition in Rotating Hybrid stars	61
	Accretion Disk Oscillations and QPOs in X-ray Binaries	67
	Bare Strange Quark Stars: Formation and Emission	73
	Properties of Cloudy Bag Strange Stars	83
	Very Cool Close Binary Systems	93
	The Chemical Evolution of the Solar Neighbourhood	99
	Wide Binaries in the Orion Nebula Cluster	111
	Case B Binary Evolution Compared to Observed Algols	117
	Statistics of Times of Minimum Light of 1140 Eclipsing Binary Stars	127
	The Effect of Irradiation Absorption	131
	A Hot Spot Model for GR Tauri	135
	Modeling Light Curves of Systems with Accretions Disks: RY Set	145
	A Photometric Study of Selected Near-Contact Binary Systems	151
	Peculiar Am Stars After Hipparcos	159
	Rotational Velocities of B Stars	165
	Submillimeter Wave Astronomy Satellite and Star Formation	173
	Young Stars at Large Distances from the Galactic Plane: Mechanisms of Formation	179
	Festering Problems in the Upper HR Diagram	185
	A Comparative Study of the Balmer Decrements in Emission-Line Stars	195
	Observations of Cataclysmic Variables with the Far Ultraviolet Spectroscopic Explorer	201
	The Eclipsing Cataclysmic Triple System V471 Tan	207
	Spectroscopic Diagnosis on Symbiotic Star Z And during Recent Outburst Phase	213
	Distances and Kinematics of Classical Copheids	221
	Ratio of the Co-moving Luminosity in the Jet to the Unbeamed Luminosity of Blazars	229
	Hybrid Disk Model and Continuum Spectrum	237
	XMM-Newton Observations of X-ray Afterglow of GRB 001025	241
	Gravitational Waves from Phase-Transition Induced Collapses of Neutron Stars	245
	Thermal Bremsstrahlung in a Two-Temperature Plasma	249
	Studies of Hard X-Ray Tails in Cir X-1 with HEXTE/RXTE	253
	Characteristic Variability Time Scales of Long Gamma-Ray Bursts	259
	A Possible Mechanism for Hot Corona Formation around Black Holes	263
	Cool Companions to White Dwarfs from 2MASS	267
	Why Do Most Stellar Mass Black Holes Have Masses Around Seven Solar Masses?	271
	Relativistic Effects on the Appearance of a Clothed Black Hole	275
	Infrared Flash from Pair-Rich GRB Fireball	281
	Synthetic UV Spectra of Starburst regions with Massive Close Binaries	285
	WIYN Open Cluster Study: Photometric Determination of Binary Mass Ratios	289
	The Impact of Close Binary Evolution on the Properties of the WR Bump Emission Lines of Wolf-Rayet Galaxies	293
	The Sodium Abundances in Nearby Stars	297
	Magnetoacoustic Waves in Solar Stratified Atmosphere	301
	The Spectroscopic Variability of He I Emission Line in AB Aurigae	305
	The Metallicity Distribution of the Disrupted Satellite Galaxies	309
	Relativistic Jet Acceleration in 3C 273	313
	Index	321