MARC details
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04567nam a2200253Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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IN-BaIIA |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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20211105172125.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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211028s9999 xx 000 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
IIA Library |
| 080 ## - UNIVERSAL DECIMAL CLASSIFICATION NUMBER |
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| Universal Decimal Classification number |
042:524.9 |
| Item number |
PRA |
| 100 ## - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Prabhu, T. P. |
| 9 (RLIN) |
11507 |
| Relator term |
Author |
| 245 #4 - TITLE STATEMENT |
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| Title |
The Central Regions of Sersic-Pastoriza Galaxies |
| Statement of responsibility, etc. |
T. P. Prabhu |
| Medium |
[Ph.D Thesis] |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
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| Place of publication, distribution, etc. |
Bangalore |
| Name of publisher, distributor, etc. |
Indian Institute of Astrophysics |
| Date of publication, distribution, etc. |
1979 |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
iv, 134p. |
| 502 ## - DISSERTATION NOTE |
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| Degree type |
Doctor of Philosophy |
| Name of granting institution |
Indian Institute of Astrophysics, Bangalore |
| Year degree granted |
1979<br/> |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Apart from the sustained interest in the enhanced<br/>forms of activity in the nuclei of galaxies, other<br/>classes of phenomena occurring in the central regions<br/>of galaxies have also drawn considerable interest. One<br/>such aspect of investigations of the central regions of<br/>galaxies is the system of 'hot spots' described<br/>originally by Morgan. Though some enthusiasm was<br/>derived at least once from the speculation that these<br/>are the results of a split due to explosive activity in<br/>the nucleus, the spectroscopic evidences obtained by the<br/>Burbidges and others proved that the hot spots are simply<br/>giant HII complexes.<br/>Sersio and Pasteurize broadened the definition of<br/>this olass of phenomena observed in the central regions<br/>of galaxies to include bright amorphous formations ae well.<br/>The purpose of the present investigations ia to test<br/>whether the objects from the lists of Series and Pasteurize<br/>form a homogeneous class, and to derive parameters which<br/>assist in understanding their structure and content.<br/>We begin with a brier over view of the principle of<br/>superposition of quasi-independent subsystems in galaxies<br/>in Chapter 1. We will also describe some of the classification<br/>schemes describing the central regions of galaxies Following Morgan's operational approach. we show in<br/>Chapter 2 that the central regions of galaxies listed by<br/>Sersic and Pastoriza are morphologically intermediate<br/>between the normal and Seyfert galaxies. We will also<br/>compile an additional list similar central formations<br/>based on the descriptions published by various authors.<br/>The correlation of the occurrence of such 'pronuclear<br/>formations' with the morphology of the parent galaxies<br/>is also investigated.<br/>The techniques o£ observation and of reduction<br/>are presented. They include direct and filter photography,<br/>and spectroscopy with a narrow as well as a wide slit.<br/>The techniques used in obtaining equal intensity contours<br/>are also presented.<br/>A morphological classification of the central<br/>regions of 50 galaxies from the lists of Series and<br/>Pastoriza ia proposed in Chapter 4. The classes range from<br/>the elliptioal appearance of ‘E’types, through the<br/>formations with bright dist1nct hot spots to the<br/>irregular pattern of hot spots of low surface brightness.<br/>Some correlations with the types of the parent<br/>galaxy are also investigated.<br/>The surface photometric data is presented in Chapter 5<br/>in terms of the equal intensity contours in the integrated light (~~4000-8700) for 27 galaxies from the finding list. The equivalent luminosity profiles have been presented for all these galaxies.<br/>The blue-infrared colour distribution across the<br/>nucleus and the 'perinuclear formation' have been presented<br/>in Chapter 6 for one galaxy of type E (NGC 210) and for<br/>five of class ~(NGC 613, 1097, 136,5, 1808 and 2903).<br/>The nucleus appears reddest in all the casts. The perinuclear<br/>formations of class ~ possess neutral colour with<br/>respect to the main body of the galaxy. The hot spots of formations of class ~ are generally redder than the main body of the galaxy though a few hot spots are<br/>distinctly bluer. The perinuclear regions of NGC t808<br/>are the reddest among the galaxies investigated. The<br/>nucleus of NGC 290) has been discovered on our infrared<br/>photographs.<br/>The mean profiles for different classes of formations<br/>have also been computed in Chapter 6. and appear similar<br/>to each other in all the oases except in the class ~ .<br/>The formations of class ~ have a lower luminosity<br/>Gradient than the other classes. A small difference noticed<br/>in class or could be due to the existence of discrete<br/>hot spots.<br/> |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Astronomy and Astrophysics Thesaurus |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Galaxies |
| 9 (RLIN) |
1286 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Ph.D Thesis |
| 9 (RLIN) |
1344 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Sersic-{astoriza |
| 9 (RLIN) |
11508 |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
M. K. Vainu Bappu |
| Relator term |
Supervisor |
| 9 (RLIN) |
38025 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS |
|---|
| Uniform Resource Identifier |
<a href="http://prints.iiap.res.in/handle/2248/125">http://prints.iiap.res.in/handle/2248/125</a> |
| Link text |
Click Here to Access eThesis |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Koha item type |
Thesis & Dissertations |
| Source of classification or shelving scheme |
Universal Decimal Classification |
