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The Central Regions of Sersic-Pastoriza Galaxies (Record no. 6716)

MARC details
000 -LEADER
fixed length control field 04567nam a2200253Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field IN-BaIIA
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20211105172125.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 211028s9999 xx 000 0 eng d
040 ## - CATALOGING SOURCE
Transcribing agency IIA Library
080 ## - UNIVERSAL DECIMAL CLASSIFICATION NUMBER
Universal Decimal Classification number 042:524.9
Item number PRA
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Prabhu, T. P.
9 (RLIN) 11507
Relator term Author
245 #4 - TITLE STATEMENT
Title The Central Regions of Sersic-Pastoriza Galaxies
Statement of responsibility, etc. T. P. Prabhu
Medium [Ph.D Thesis]
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Place of publication, distribution, etc. Bangalore
Name of publisher, distributor, etc. Indian Institute of Astrophysics
Date of publication, distribution, etc. 1979
300 ## - PHYSICAL DESCRIPTION
Extent iv, 134p.
502 ## - DISSERTATION NOTE
Degree type Doctor of Philosophy
Name of granting institution Indian Institute of Astrophysics, Bangalore
Year degree granted 1979<br/>
520 ## - SUMMARY, ETC.
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
Topical term or geographic name entry element Astronomy and Astrophysics Thesaurus
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
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)
Koha item type Thesis & Dissertations
Source of classification or shelving scheme Universal Decimal Classification
Holdings
Withdrawn status Lost status Source of classification or shelving scheme Damaged status Not for loan Home library Current library Shelving location Date acquired Full call number Barcode Date last seen Price effective from Koha item type
    Universal Decimal Classification     IIA Library-Bangalore IIA Library-Bangalore General Stacks 10/02/1981 042:524.9/ PRA 7469 05/11/2021 10/02/1981 Thesis & Dissertations

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