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Using Multi-Wavelength All Sky Information to Understand Large Scale Galactic Structure

Published online by Cambridge University Press:  25 May 2016

R.L. Smart ,
R. Drimmel  and
M.G. Lattanzi
R.L. Smart
Affiliation:
Osservatorio Astronomico di Torino
R. Drimmel
Affiliation:
Osservatorio Astronomico di Torino
M.G. Lattanzi
Affiliation:
Osservatorio Astronomico di Torino

Extract

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Our galaxy was first seen to be warped, similarly to other galaxies, in 21cm HI surveys (Kerr 1957). Since then a large database on our and other warps has been built but they remain a puzzle for theorists trying to construct a general warp theory. Warps are observed to be common rather than rare features of spiral galaxies, which implies they are long lived. They are observed in both isolated and multiple galaxy systems in the gas but the stellar warp is often difficult to detect. The galactic warp is always below b=10° making it difficult to observe because of absorption and confusion, to add to this problem the sun appears to lie near to the line of nodes and to view the warp at it's largest extent we must observe through a large part of the disk. A theoretical model must evoke driving forces that explain the longevity, commonality, and independence of environment that we see in warps.

Type
Part 4. Galactic Structure
Information
Symposium - International Astronomical Union , Volume 179: New Horizons from Multi-Wavelength Sky Surveys , 1998 , pp. 217 - 220
Copyright
Copyright © Kluwer 1998 

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