Be and Shell Stars

Front Matter....Pages I-XVI
Introductory Address....Pages 1-10
Front Matter....Pages 11-11
Spectra and Photometry of Be Stars....Pages 13-27
A Survey of Hα in the Brighter Northern Be Stars....Pages 29-29
A Study of Be Stars in Clusters....Pages 31-32
Emission Features of Several Be Stars as Related to Their Luminosity Class and Spectral Type....Pages 33-36
Rapid Variations in the Spectra of ο and, γ Cas, and χ Oph....Pages 37-40
Rapid Variations of H α in Be Stars....Pages 41-49
Stellar Photometric Observations at Hα through a Narrow-Band Interference Filter....Pages 51-58
Spectroscopic Observations of Be Stars in the near Infrared....Pages 59-65
New Observational Data Concerning 4 Her and ζ Tau....Pages 67-67
The Surface Gravities of Be Stars....Pages 69-78
A Comparative Study of the Shell of ζ Tau and 48 Lib....Pages 79-85
A Model for the Shell of HD 50138....Pages 87-93
Observations Récentes de HD 200120....Pages 95-97
Singly-Ionized Iron Emission Lines in the Spectra of Early Type Stars....Pages 99-103
Pleione as a Variable Star....Pages 105-106
Energy Distributions of Be Stars....Pages 107-119
Front Matter....Pages 121-121
Be Stars as Rotating Stars: Observations....Pages 123-136
Ultraviolet Observations of Rapidly Rotating B-Type Stars....Pages 137-137
The Relationship of the Oe to the Be Stars....Pages 139-147
Front Matter....Pages 121-121
Hα and Hβ Measures as Related to be Star Rotation....Pages 149-154
Front Matter....Pages 155-155
Radio Observations of Be Stars....Pages 157-164
Ultraviolet Observations of Be Stars....Pages 165-178
A Survey of Mass Loss from Be and Shell Stars Using Ultraviolet Data from Copernicus ....Pages 179-189
Ultraviolet Si IV/C IV Ratios for Be Stars....Pages 191-195
The Near Ultraviolet Spectrum of ζ Tau....Pages 197-198
Spectroscopic Observations of the Be Stars η Cen, γ Cas and Φ Per....Pages 199-207
The Far Ultraviolet Spectra of υ Cyg and µ Cen....Pages 209-217
Photographic Infrared Spectroscopy and near Infrared Photometry of Be Stars....Pages 219-225
Paschen Decrements in Be Stars....Pages 227-227
The Classification of Faint Be Stars....Pages 229-231
Polarization in Be Stars....Pages 233-260
Polarization Measurements Across the Balmer Lines of Be and Shell Stars....Pages 261-275
Intrinsic Linear Polarization of Be Stars as a Function of υ sin i ....Pages 277-277
Front Matter....Pages 279-279
Line Formation in Expanding Atmospheres....Pages 281-312
Radiative Transfer in Dynamic Stellar Atmospheres....Pages 313-313
Si II Lines in the Shell of ζ Tau....Pages 315-320
The Complex Structure of the Ca II H and K Lines in the Spectrum of the A0ep Star with Infrared Excess HD 190073....Pages 321-321
Theoretical Emission-Line Profiles Computed at Ondřejov....Pages 323-325
Motions in the Shells and Atmospheres of V923 Aql and EW Lac and Their Manifestation in the Spectrum....Pages 327-331
Front Matter....Pages 333-333
Models for the Circumstellar Envelopes of Be Stars....Pages 335-370
On the Possible Role of Magnetic Fields in the Dynamics of the Be Phenomenon....Pages 371-373
Theoretical Wavelength Dependence of Polarization in Early-Type Stars....Pages 375-376
The Possible Role of Radiative Acceleration in Supporting Extended Atmospheres in Be Stars....Pages 377-382
Front Matter....Pages 383-383
Duplicity of Be Stars as Seen from Ondřejov....Pages 385-400
On the Detection of Binary Be Stars....Pages 401-415
Evidence for the Existence of Mass-Exchange Binary Be Stars from Periodic Spectral Variations....Pages 417-428
Toward a Model for the Be Binary System Φ Per....Pages 429-437
Final Remarks on the Binary Hypothesis for the Be Stars....Pages 439-444
Front Matter....Pages 445-445
General Discussion....Pages 447-451
Concluding Remarks....Pages 453-455
Back Matter....Pages 457-465