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Sham, Yu Hin = 愛丁頓－玻恩－英費爾德重力理論和廣義相對論下的致密星 / 岑宇軒. / Thesis Ph.D. Chinese University of Hong Kong 2015. / Includes bibliographical references (leaves 137-143). / Abstracts also in Chinese. / Title from PDF title page (viewed on 15, September, 2016). / Sham, Yu Hin = Aidingdun-Boen-Yingfeierde zhong li li lun he guang yi xiang dui lun xia de zhi mi xing / Cen Yuxuan.

Tso Ka Yee = 致密星的研究 / 曹家怡. / Thesis submitted in: September 2006. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (leaves 86-88). / Abstracts in English and Chinese. / Tso Ka Yee = Zhi mi xing de yan jiu / Cao Jiayi. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Brief History of Neutron Stars --- p.1 / Chapter 1.2 --- The Proposal of Strange Quark Stars --- p.3 / Chapter 1.3 --- "Observation of Stellar Masses, Radii and Moment of Inertia" --- p.4 / Chapter 1.3.1 --- Radius Measurement --- p.5 / Chapter 1.3.2 --- Mass Measurement --- p.6 / Chapter 1.3.3 --- Moment of Inertia Measurement --- p.8 / Chapter 1.4 --- PSR B1828-11 --- p.8 / Chapter 1.5 --- Effect of rotation on a star's precession --- p.12 / Chapter 1.5.1 --- Reference Frames of the Star --- p.12 / Chapter 1.5.2 --- Dynamics of Free Precession --- p.14 / Chapter 1.6 --- Motivation --- p.17 / Chapter 2 --- Static structure of a compact star --- p.18 / Chapter 2.1 --- Equation of State that We Used --- p.18 / Chapter 2.1.1 --- Thomas-Fermi Model (TF96) --- p.18 / Chapter 2.1.2 --- MIT Bag Model --- p.19 / Chapter 2.1.3 --- Perturbative QCD Model --- p.21 / Chapter 2.2 --- Non-relativistic compact stars --- p.23 / Chapter 2.2.1 --- Lane-Emden Equation --- p.23 / Chapter 2.3 --- General Relativistic Approach --- p.24 / Chapter 2.3.1 --- The Oppenheimer-Volkoff Equations --- p.24 / Chapter 2.3.2 --- Properties of Compact Stars --- p.26 / Chapter 3 --- Non-relativistic rotating star --- p.29 / Chapter 3.1 --- Rotating Lane-Emden Equations --- p.29 / Chapter 3.2 --- The Moment of Inertia Tensor --- p.34 / Chapter 3.3 --- Models --- p.35 / Chapter 3.4 --- Results --- p.38 / Chapter 3.5 --- Summary --- p.46 / Chapter 4 --- Relativistic rotating star --- p.47 / Chapter 4.1 --- Rotating metric --- p.48 / Chapter 4.2 --- Frame Dragging Effect --- p.49 / Chapter 4.3 --- Hartle-Thorne Perturbative Solution --- p.52 / Chapter 4.4 --- Results --- p.56 / Chapter 4.5 --- Summary --- p.65 / Chapter 5 --- Effects of extra dimensions on non-rotating stars --- p.66 / Chapter 5.1 --- Background of Extra dimensional theories --- p.66 / Chapter 5.2 --- Results --- p.69 / Chapter 5.3 --- Summary --- p.82 / Chapter 6 --- Conclusion --- p.84 / Bibliography --- p.86

This thesis is an analysis of the X-ray, optical, infrared and radio properties of a sample of candidate BL Lac objects, identified from two catalogues of colour-selected point sources, the 2QZ and 6QZ. The importance of the sample lies in the fact that it is the first BL Lac sample in which initial selection has been made from optical spectra, independent of the objects' flux levels at X-ray and radio frequencies. These optically selected candidate BL Lac objects thus provide an unbiased sample (in terms of radio flux density) with which to study the proportion of radio- dominant and X-ray-dominant BL Lac objects in the global population. The observed number counts and redshift distribution of the 2BL are consistent with theoretical predictions based on the QSO evolutionary model. Given the small number statistics we are not, however, able to show that this distribution is significantly different to that of the 2QZ/6QZ white dwarfs. A median redshift of z=1.25 was computed for these candidate BL Lacs, a value supported by redshift information obtained for ~25% of the sample. This median redshift is much higher than redshifts found for X-ray selected BL Lac objects and suggests that in the past high redshift, low luminosity, radio-weak BL Lacs may have been missed in radio- and X-ray-selected samples. From results of the above studies it appears that this sample of optically selected candidate BL Lac objects is different to that of hitherto known radio-loud BL Lacs. We explore mechanisms that might produce such radio-weak/radio-quiet continuum objects, and also demonstrate that such radio-quiet BL Lac objects could exist at low redshift. Failure to include these radio-quiet BL Lacs in X-ray selected samples could explain the negative evolution found for this class of object.

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 282-294). Available also in a digital version from Dissertation Abstracts.

The investigation of the host galaxies of BL Lac objects (BL Lacs) is a promising new field made practical in recent years by advances in detector technology and improved telescope siting. By better understanding the nature of these host galaxies we can test the standard beaming and lensing models for BL Lacs. This thesis describes the techniques that we have developed for studying the host galaxies of BL Lac objects, and presents the results of a survey of BL Lac host galaxies that we have undertaken with the 4.2m William Herschel Telescope. This survey successfully resolved many new host galaxies, determined the morphology of three BL Lac host galaxies for the first time, and confirmed the morphology of an additional three objects. One BL Lac object, PKS1413+135, displayed a number of surprising properties, and was consequently studied in greater detail at multiple wavelengths. These observations are also presented in this thesis. We conclude with a description of Monte-Carlo simulations that we have undertaken in order to better determine the uncertainty in the results from our survey, and to assess the promise of future telescope/instrumentation combinations for host galaxy imaging.

This thesis is an analysis of the X-ray, optical, infrared and radio properties of a sample of candidate BL Lac objects, identified from two catalogues of colour-selected point sources, the 2QZ and 6QZ. The importance of the sample lies in the fact that it is the first BL Lac sample in which initial selection has been made from optical spectra, independent of the objects' flux levels at X-ray and radio frequencies. These optically selected candidate BL Lac objects thus provide an unbiased sample (in terms of radio flux density) with which to study the proportion of radio- dominant and X-ray-dominant BL Lac objects in the global population. The observed number counts and redshift distribution of the 2BL are consistent with theoretical predictions based on the QSO evolutionary model. Given the small number statistics we are not, however, able to show that this distribution is significantly different to that of the 2QZ/6QZ white dwarfs. A median redshift of z=1.25 was computed for these candidate BL Lacs, a value supported by redshift information obtained for ~25% of the sample. This median redshift is much higher than redshifts found for X-ray selected BL Lac objects and suggests that in the past high redshift, low luminosity, radio-weak BL Lacs may have been missed in radio- and X-ray-selected samples. From results of the above studies it appears that this sample of optically selected candidate BL Lac objects is different to that of hitherto known radio-loud BL Lacs. We explore mechanisms that might produce such radio-weak/radio-quiet continuum objects, and also demonstrate that such radio-quiet BL Lac objects could exist at low redshift. Failure to include these radio-quiet BL Lacs in X-ray selected samples could explain the negative evolution found for this class of object.