THE GASEOUS DISK ALMOST PERPENDICULAR TO THE GALACTIC PLANE
Author: BYSTROVA, N. V.
Source: Astronomical and Astrophysical Transactions, Volume 21, Numbers 1-3, 1 January 2002 , pp. 111-115(5)
Publisher: Taylor and Francis Ltd
Abstract:Around the calculated position of the Magellanic Stream's great circle, two very extended zones (I and II) were chosen, situated azimuthally opposed each other. These zones were observed with the RATAN-600 telescope in the HI radioline at the relative low LSR-velocities. Six hours were necessary to cross the zones at every declination from −40 to +62.5 degrees. The comparison was made of the warp-like signals in the Magellanic Stream and those in the galactic gaseous disk (the North and the South warps). Their sizes, the amount and the direction of the displacements relative to the RA direction in the Magellanic Stream were evaluated. The position of the plane through maximum deformations was determined. The behaviour of HI in the stream shows that there is possibly a gaseous disk similar to that of the polar ring in external galaxy. The warp tendencies in the stream plane were firstly proposed using the observations with the Large Pulkovo Radiotelescope.
Document Type: Research Article
Affiliations: St. Petersburg Branch of the Special Astrophysical Observatory RAS, St. Petersburg, 196140, Russia
Publication date: 1 January 2002