The HI supershell GS061+00+51 and its neighbours

¹ Astronomical Institute, Academy of Sciences of the Czech Republic, BočníII 1401, 141 31 Prague 4, Czech Republic
² MPIfR, Auf dem Hügel 69, 53121 Bonn, Germany

Corresponding author: S. Ehlerová, sona@alnitak.ig.cas.cz

Received: 27 February 2001
Accepted: 18 May 2001

Abstract

We describe Hi observations of a field in the Milky Way centered on , made by the Effelsberg radiotelescope. The field contains one previously identified Hi supershell, GS061+00+51 (Heiles [CITE]); apart from it we find several new structures. We also study the Hi distribution in the vicinity of four Hii regions, S86, S87, S88 and S89. We confirm the existence of the shell GS061+00+51, and we find that it has two smaller neighbours, spherical shells with . We identify at least one more regular shell at ; and one blown-out shell at . In two cases we are able to connect Hii regions with features in the Hi distribution (S86 and S87), in two other cases no connection is found. Apart from quite regular Hi shells we see a number of non-coherent objects, which are probably a result of the turbulence in the interstellar medium.