HI observations of the high-velocity cloud in the direction of M 92

We present wide-field neutral hydrogen (H I) Lovell telescope multibeam, an d Dominion Radio Astrophysical Observatory Hi synthesis observations, of th e high velocity cloud (HVC) located in the general direction of the globula r cluster M92. This cloud is part of the larger Complex C and lies at veloc ities between similar to -80 and -130 km s(-1) in the Local Standard of Res t. The Lovell telescope observations, of resolution 12 arcmin spatially and 3.0 km s(-1) in velocity, fully sampling a 3.1 degrees x 12.6 degrees RA-D ec grid, have found that this part of HVC Complex C comprises two main cond ensations, lying approximately north-south in declination, separated by sim ilar to2 degrees and being parallel to the Galactic plane. At this resoluti on, peak values of the brightness temperature and Hi column density of simi lar to1.4 K and similar to5 x 10(19) cm(-2) are determined, with relatively high values of the full width half maximum velocity (FWHM) of similar to 2 2 km s(-1) being observed, equivalent to a gas kinetic temperature, in the absence of turbulence and geometric effects of similar to 10 000 K. Each of these properties, as well as the sizes of the clouds, are similar in the t wo components. The DRAO observations, towards the Northern HVC condensation , are the first high-resolution Hi spectra of Complex C. When smoothed to a resolution of 3 arcmin, they identify several Hi intensity peaks with colu mn densities in the range 4-7 x 10(19) cm(-2). Further smoothing of these d ata to 6 arcmin resolution tentatively indicates that parts of the HVC cons ist of two velocity components, of similar brightness temperature, separate d by similar to7 km s(-1) in velocity, and with FWHM velocity widths of sim ilar to5-7 km s(-1). No IRAS 60 or 100 micron flux is associated with the M 92 HVC. Cloud properties are briefly discussed and compared to previous obs ervations of HVCs.