Issues of 2009
This page lists the home pages for this web site for the year 2009. These
pages constitute volume 6 of The Astrophysics Spectator.
- Issue 6.09, October 7, 2009. Only one observation directly supports the theory for core-collapse supernovae, and that is the neutrinos detected from supernova 1987A. In this issue, a page is added to the web site that describes the detection of these neutrinos and their agreement with theory.
- Issue 6.08, September 10, 2009. After a summer hiatus in updates to the site, a page on the basic physics of core-collapse supernovae is added.
- Issue 6.07, June 3, 2009. A page describing the processes that convert carbon and oxygen into nickel in a thermonuclear supernova is added to the web site.
- Issue 6.06, May 2, 2009. With this issue, two pages that discuss thermonuclear supernovae are added to this web site. The first page, which replaces an older page, describes the theories for thermonuclear supernovae. The second page describes the energetics of these supernovae.
- Issue 6.05, March 25, 2009. A new topic path, “Supernovae,” is added to the web site in this issue. The first page in an introductory page about the two types of supernova and their role in the evolution of the Galaxy and the study of the universe.
- Issue 6.04, March 6, 2009. The emission of neutrinos by neutron stars is discussed in a page added in this issue of the web site.
- Issue 6.03, February 13, 2009. This issue adds a page on how degenerate (white) dwarf stars cool by emitting neutrinos. By emitting neutrinos, a degenerate dwarf cools from the inside out, and much faster than it could by emitting light from its photosphere.
- Issue 6.02, January 30, 2009. One more page is added to the “Degenerate Objects” topical path. This new page explains why very large, compact objects, such as Sgr A* at the center of the Milky Way, must be black holes in our astrophysical theories. With this issue, a commentary on how the “stimulus” spending bill that passed the U.S. House of Representatives is likely to harm astronomy and astrophysics over the long-term.
- Issue 6.01, January 19, 2009. The first issue of 2009 adds a page discussing the radius of a degenerate object. In particular, the page describes how the radii of the degenerate dwarf and the neutron star are related to the masses of the electron and the proton.