Here we review the efforts of a number of recent results that use old tracers to understand the build up of the Galaxy. Details that lead directly to using...
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PublicationImpact of Distance Determinations on Galactic Structure. II. Old Tracers
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PublicationIntrinsic parameters of massive OB-stars
We present the results of our observations of stars of type O5 and earlier and show that inclusion of the line blocking between 228 and 912 A solves the problem...
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PublicationM. N. Bremer, N. Jackson and I. Perez-Fournon (eds.), Observational Cosmology with the New Radio Surveys, Astrophysics and Space Science Library, Vol. 226
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PublicationMass Measurements of Stellar and Intermediate-Mass Black Holes
We discuss the method, and potential systematic effects therein, used for measuring the mass of stellar-mass black holes in X-ray binaries. We restrict our...
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PublicationOld-Aged Primary Distance Indicators
Old-aged stellar distance indicators are present in all Galactic structures (halo, bulge, disk) and in galaxies of all Hubble types and, thus, are immensely...
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PublicationP Cygni: An Extraordinary Luminous Blue Variable
P Cygni is a prototype for understanding mass loss from massive stars. This textbook star is known first of all because of two great eruptions in the 17th...
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PublicationPartially Ionized Plasmas in Astrophysics
Partially ionized plasmas are found across the Universe in many different astrophysical environments. They constitute an essential ingredient of the solar...
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PublicationSolar Coronal Jets: Observations, Theory, and Modeling
Coronal jets represent important manifestations of ubiquitous solar transients, which may be the source of significant mass and energy input to the upper solar...
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PublicationSolar Surface and Atmospheric Dynamics. The Photosphere
Various aspects of the magnetism of the quiet sun are reviewed. The suggestion that a small scale dynamo acting at granular scales generates what we call the...