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ar X iv : a st ro - p h / 99 02 06 2 v 1 4 F eb 1 99 9 SOURCES OF RELATIVISTIC JETS IN THE GALAXY

ar X iv : a st ro - p h / 98 02 08 2 v 1 6 F eb 1 99 8 What is the True Covering Factor of Absorbing Matter in BALQSO ’ s ?

ar X iv : a st ro - p h / 98 02 02 8 v 1 3 F eb 1 99 8 Phase Transitions in Neutron Stars

Phase transitions in neutron stars due to formation of quark matter, kaon condensates, etc. are discussed with particular attention to the order of these transitions. Observational consequences of phase transitions in pulsar angular velocities are examined.

ar X iv : a st ro - p h / 99 02 11 7 v 1 8 F eb 1 99 9 A Mid - Infrared HIRES Atlas of the Galactic Plane

A mid-infrared atlas of the Galactic Plane (MIGA) has been constructed to provide a mid-infrared data set for the Canadian Galactic Plane Survey, a Canadian-lead international project to map all of the major components of the interstellar medium of the Milky Way at a common resolution of approximately 1 ′. The atlas is based on HIRES processing of IRAS 12 and 25 µm data. Details of the MIGA pro...

ar X iv : a st ro - p h / 98 02 02 7 v 1 3 F eb 1 99 8 Recalibration of Luminosity –

A recalibration of the luminosity–linewidth technique is discussed which introduces (i) new cluster calibration data, (ii) new corrections for reddening as a function of inclination, and (iii) a new zero-point calibration using 13 galaxies with distances determined via the cepheid period– luminosity method. It is found that H 0 = 82 ± 16 km s −1 Mpc −1 (95% confidence).

ar X iv : a st ro - p h / 98 02 08 8 v 1 7 F eb 1 99 8 to appear in the AJ The Distance to the M 31 Globular Cluster System

The distance to the centroid of the M31 globular cluster system is determined by fitting theoretical isochrones to the observed red-giant branches of fourteen globular clusters in M31. The mean true distance modulus of the M31 globular clusters is found to be µ 0 = 24.47 ± 0.07 mag. This is consistent with distance moduli for M31 that have been obtained using other distance indicators.