Now showing items 11-20 of 104
Optical interferometry in astronomy
(IOP Publishing Ltd, 2003-05-01)
Here I review the current state of the field of optical stellar interferometry, concentrating on ground-based work although a brief report of space interferometry missions is included. We pause both to reflect on decades ...
Lithopanspermia in Star-Forming Clusters
(Mary Ann Liebert, Inc., publishers, 2005-08-01)
This paper considers the lithopanspermia hypothesis in star-forming groups and clusters, where the chances of biological material spreading from one solar system to another is greatly enhanced (relative to action in the ...
Implementing TOPbase/Iron Project: continuous absorption from Fe ii
(Blackwell Science Ltd, 2003-06)
We discuss implementation of TOPbase and Iron Project opacities for stellar spectral codes. We use a technique employed by Peach, where a Boltzmann-averaged cross-section is calculated for selected temperatures, and the ...
Journey to the M BH –Σ relation: the fate of low-mass black holes in the Universe
(Blackwell Publishing Ltd, 2009-12-21)
In this paper, we explore the establishment and evolution of the empirical correlation between black hole mass ( M BH ) and velocity dispersion (Σ) with redshift. We trace the growth and accretion history of massive black ...
The inner jet of an active galactic nucleus as revealed by a radio-to-gamma-ray outburst
(Nature Publishing Group, 2008-04-24)
Blazars are the most extreme active galactic nuclei. They possess oppositely directed plasma jets emanating at near light speeds from accreting supermassive black holes. According to theoretical models, such jets are ...
Reminiscences: Exotic Stars and Exotic Elements—An entirely Self-Serving Document
(IOP Publishing Ltd, 2005-01-01)
This article is an expanded version of a talk given at a special session of the ASOS-8 colloquium, celebrating my 70th birthday.
Heavy calcium in CP stars ★
(Blackwell Publishing Ltd, 2007-06-01)
Large wavelength shifts of infrared triplet lines of Ca ii have been observed in the spectra of HgMn and magnetic Ap stars. They have been attributed to the heavy calcium isotopes, including 48 Ca. One member of the triplet, ...
The Future of our Universe: From the 21st Century to the End
(2009-04-10)
This talk describes our current picture for the long term fate of the cosmos. We discuss the evolution of planets, stars, galaxies, and the universe itself over time scales that greatly exceed the current age of the universe. ...
The Need for a Self-Consistent Model of the ISM
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-02)
The interstellar medium of the Milky Way possesses a remarkable rangeof components, which have individual lifetimes considerably less than aHubble time. Consequently, there has been a major effort inunderstanding the ...