Friday, July 31, 2009

Interesting Astrophysics: Jul 27 to 31

It has been a quiet week in terms of preprints or papers I consider interesting. Given the low number of items I'll let each paper speak for itself.


Galaxies and Starbursts

Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies
Carolin N. Cardamone, et al, arXiv:0907.4155 [ps, pdf, other]
Comments: 18 pages, including 13 figures and 4 tables, Accepted for publication by MNRAS

The Physics of the FIR-Radio Correlation: I. Calorimetry, Conspiracy, and Implications
Brian C. Lacki, Todd A. Thompson, Eliot Quataert, arXiv:0907.4161 [ps, pdf, other]
Comments: Submitted to ApJ

Abstracted from their abstract: We show that ~1% of the kinetic energy from supernova explosions must go into primary CR electrons and that ~10% must go into primary CR protons. Secondary electrons and positrons are likely comparable to or dominate primary electrons in dense starburst galaxies. We discuss the implications of our models for the magnetic field strengths of starbursts, the detectability of starbursts by Fermi, and cosmic ray feedback. Overall, our models indicate that both CR protons and electrons escape from low surface density galaxies, but lose most of their energy before escaping dense starbursts. The FIR-radio correlation is caused by a combination of the efficient cooling of CR electrons (calorimetry) in starbursts and a conspiracy of several factors.

The Extension of the Transition Temperature Plasma into the Lower Galactic Halo
Blair D. Savage, Bart Wakker, arXiv:0907.4955 [pdf]
Comments: Accepted for publication in ApJ (63 pages including 6 figures and 5 tables)


Black Holes and AGN

Environment or Outflows? New insight into the origin of narrow associated QSO absorbers
Vivienne Wild, arXiv:0907.5221 [ps, pdf, other]
Comments: 10 pages, 5 figures, to appear in proceedings of the INAF-Oxford-COSMOCT Workshop on "The Interface between Galaxy Formation and AGNs", (Eds. V. Antonuccio-Delogu and J. Silk)


Stars, Supernovae, and Planets

A Universal Luminosity Function for Radio Supernova Remnants
Laura Chomiuk, Eric M. Wilcots, arXiv:0907.4783 [ps, pdf, other]
Comments: Accepted for publication in the Astrophysical Journal

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