Friday, August 28, 2009

Interesting Astrophysics: Aug 14 - 28

A broad range of generally interesting papers have appeared over the last two weeks, all from the arXiv preprint server. Of particular note are a couple of papers based on Spitzer Space Telescope observations of galaxies (Satyapal et al; Bernard-Salas et al), radio observations of CO and HI in nearby starbursts (Israel; Shafi et al), and a review of nearby galaxy properties by Blanton & Moustakas.

Galaxies and Starbursts

The Incidence of Active Galactic Nuclei in Pure Disk Galaxies: The Spitzer View
S. Satyapal, T. Boeker, W. Mcalpine, M. Gliozzi, N. P. Abel, T. Heckman, arXiv:0908.1820 [ps, pdf, other]
Comments: 17 pages, 8 figures, accepted for publication in ApJ

Ultraluminous X-ray Sources in Interacting Galaxies
Douglas A. Swartz, arXiv:0908.2459 [ps, pdf, other]
Comments: 5 pages to appear in the Proceedings of the Galaxy Wars: Stellar Populations and Star Formation in Interacting Galaxies Conference

The Spatially Resolved Star Formation Law from Integral Field Spectroscopy: VIRUS-P Observations of NGC 5194
Guillermo A. Blanc, Amanda Heiderman, Karl Gebhardt, Neal J. Evans II, Joshua Adams, arXiv:0908.2810 [ps, pdf, other]
Comments: 23 pages, 19 figures, 14 pages of tables. Accepted for publication in ApJ

From the abstract: "We present a new method for fitting the Star Formation Law (SFL), which includes the intrinsic scatter in the relation as a free parameter, allows the inclusion of non-detections, and is free of the systematics involved in performing linear correlations over incomplete data in logarithmic space."

A Spitzer high resolution mid-infrared spectral atlas of starburst galaxies
J. Bernard-Salas, H.W.W. Spoon, V. Charmandaris, V. Lebouteiller, D. Farrah, D.Devost, B.R. Brandl, Yanling Wu, L. Armus, L. Hao, G.C. Sloan, D.Weedman, J.R. Houck, arXiv:0908.2812 [ps, pdf, other]
Comments: 25 pages (emulate apj), 6 tables, 14 figures, Accepted for publication in ApJS

From the abstract: "We use the fine-structure lines to derive the abundance of neon and sulfur for 14 objects where the HI 7-6 line is detected. .... We have combined the spectra of all the pure starburst objects to create a high S/N template, which is available to the community."

Physical properties and environments of nearby galaxies
Michael R. Blanton, John Moustakas, arXiv:0908.3017 [ps, pdf, other]

Comments: Annual Reviews of Astronomy and Astrophysics, Vol. 47, in press, full resolution version at this http URL

The Extremely Young Star Cluster Population In Haro 11
Angela Adamo, Göran Östlin, Erik Zackrisson, Matthew Hayes, arXiv:0908.3107 [ps, pdf, other]
Comments: 4 pages, 3 figures. To appear in the proceedings of "Galaxy Wars: Stellar Populations and Star Formation in Interacting Galaxies" (Tennessee, July 09)

The Automatic Galaxy Collision Software
Beverly J. Smith, Chris Carver, Phillip Pfeiffer, Sam Perkins, Jason Barkanic, Steve Fritts, Derek Southerland, Dinikar Manchikalapudi, Matt Baker, John Luckey, Coral Franklin, Amanda Moffett, Curtis Struck, arXiv:0908.3478 [ps, pdf, other]
To appear in the Proceedings of the Galaxy Wars: Stellar Populations and Star Formation in Interacting Galaxies Conference

A composite K-band Luminosity Function for Cluster Galaxies
Roberto De Propris, Daniel Christlein, arXiv:0908.3520 [ps, pdf, other]
Comments: 3 pages, 1 figure, Astronomische Nachrichten (JENAM 2008 Symposium 6)

CI and CO in nearby galaxy centers. The star-burst galaxies NGC 278, NGC 660, NGC 3628, NGC 4631, and NGC 4666
F.P. Israel, arXiv:0908.3586 [ps, pdf, other]
Comments: Accepted for publication in Astronomy & Astrophysics

Note to self: NGC 3628 data and discussion.

The Hot and Cold Outflows of NGC 3079
N. Shafi, R. Morganti, T. Oosterloo, R. Booth, arXiv:0908.3979 [ps, pdf, other]
Comments: To appear in the Proceedings of the "Galaxy Wars: Stellar Populations and Star Formation in Interacting Galaxies" Conference, B. Smith, N. Bastian, J. Higdon and S. Higdon eds, in press

Outflowing HI within the central 1 kpc of NGC 3079.

High Energy Astrophysics

Numerical computation of isotropic Compton scattering
R. Belmont, arXiv:0908.2705 [ps, pdf, other]
Comments: 11 pages. Accepted for publication in A&A

Numerical Astrophysics and Hydrodynamics

Two-Fluid MHD Simulations of Converging Hi Flows in the Interstellar Medium. II: Are Molecular Clouds Generated Directly from Warm Neutral Medium?
Tsuyoshi Inoue, Shu-ichiro Inutsuka, arXiv:0908.3701 [ps, pdf, other]
Comments: 9 pages, 8 figures, accepted by ApJ

Magnetic field in dwarf galaxies: building block for a Cosmic Dynamo?
Yohan Dubois, Romain Teyssier, arXiv:0908.3862 [ps, pdf, other]
Comments: 16 pages, 10 figures, submitted to A&A

I'll need to have a closer look at this paper. From their abstract: "We are testing whether dwarf galaxies are good candidates to explain the enrichment of the IGM: after their discs form and trigger galactic dynamos, supernova feedback will launch strong winds, expelling magnetic field lines in the IGM. We have performed MHD simulations of an isolated dwarf galaxy, forming self-consistently inside a cooling halo. Using the RAMSES code, we have for the first time simulated the formation of a magnetised supernova-driven galactic outflow."

Stars, Supernovae and Planets

Seeking Core-Collapse Supernova Progenitors in Pre-Explosion Images
Douglas C. Leonard, arXiv:0908.1812 [ps, pdf, other]
Comments: 10 pages, to appear in "Hot And Cool: Bridging Gaps in Massive Star Evolution", C. Leitherer, Ph. D. Bennett, P. W. Morris, & J. Th. van Loon (eds.), ASP Conf. Ser

Measuring The Mass Loss Evolution at The Tip of The Asymptotic Giant Branch
C. Sandin, M. M. Roth, D. Schönberner, arXiv:0908.2432 [ps, pdf, other]
Comments: 6 pages, submitted, workshop in honour of Agnes Acker, Legacies of the Macquarie/AAO/Strasbourg Halpha Planetary Nebula project, eds. Q.Parker and D.Frew, PASA

Radio observations of colliding winds in massive stars
Sean M. Dougherty, arXiv:0908.2660 [ps, pdf, other]
Comments: Invited review at HEPIMS Workshop (Jaen 2009); 12 pages, 6 figures, to appear in PASP

Accurate masses and radii of normal stars: modern results and applications
G. Torres, J. Andersen, A. Gimenez, arXiv:0908.2624 [ps, pdf, other]
56 pages including figures and tables. To appear in The Astronomy and Astrophysics Review. Ascii versions of the tables will appear in the online version of the article

Great review, impressive results. In all the flash and bang associated with popular subjects like cosmology, black holes, gamma ray bursts and planets it is easy to forget that stars are still of fundamental importance, and that there is still much we don't know or need to know better. I'm glad to see people still do this kind of work.


The mystery of the telescopes in Jan Brueghel the Elder's paintings
Paolo Molaro, Pierluigi Selvelli, arXiv:0908.2696 [ps, pdf, other]
Comments: 4 pages, 2 figures Proceedings 53 SAIt 2009, Pisa

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