ar X iv : a st ro - p h / 01 08 47 0 v 1 2 9 A ug 2 00 1 Structure of Protostellar Collapse Candidate B 335 Derived from Near - Infrared Extinction Maps 1

ar X iv : a st ro - p h / 03 08 14 3 v 1 8 A ug 2 00 3 Envelope Structure of Starless Core L 694 - 2 Derived from a Near - Infrared Extinction Map

We present a near-infrared extinction study of the dark globule L694-2, a starless core that shows strong evidence for inward motions in the profiles of molecular spectral lines. The J,H, and K band data were taken using the Eu-ropean Southern Observatory New Technology Telescope. The best fit simple spherical power law model has index p = 2.6 ± 0.2, over the ∼ 0.036–0.1 pc range in radius samp...

ar X iv : a st ro - p h / 04 08 13 5 v 1 9 A ug 2 00 4 A Determination of the Chemical Composition of α Centauri A from Strong Lines

ar X iv : a st ro - p h / 98 08 21 9 v 1 2 0 A ug 1 99 8 Sgr A ∗ : A supermassive black hole or a spatially extended object ?

ar X iv : a st ro - p h / 00 08 44 8 v 1 2 9 A ug 2 00 0 The Impact of Adaptive Optics on Star Formation Research

In this paper, we discuss the benefits of ground-based, adaptive optics (AO) aided observations for star formation research. After outlining the general advantages, we present results obtained during the ALFA science demonstration programme in 1999. These results underline the absolute necessity of AO assistance for almost any kind of observations regarding star formation regions.

ar X iv : a st ro - p h / 01 08 23 3 v 1 1 4 A ug 2 00 1 Deep Studies of the Resolved Stellar Populations in the Outskirts of M 31

We discuss the first results from ongoing studies of the resolved stellar populations in the outskirts of our nearest large neighbour, M31. Deep HST/WFPC2 archival observations are used to construct colour-magnitude-diagrams which reach well below the horizontal branch at selected locations in the outer disk and halo, while a panoramic ground-based imaging survey maps spatial density variations...