Astrophysics [2]arXiv.org > [3]astro-ph Search for ([4]Help | [5]Advanced search) ______________ [All papers] Go! Astrophysics _________________________________________________________________ astro-ph new abstracts, Tue, 20 Jun 06 00:00:10 GMT 0606413 -- 0606458 received _________________________________________________________________ astro-ph/0606413 [[6]abs, [7]ps, [8]pdf, [9]other] : Title: High energy neutrino astronomy using upward-going muons in Super-Kamiokande-I Authors: [10]K. Abe et al. (The Super-Kamiokande Collaboration) Comments: 8 pages, 6 figures, submitted to ApJ We present the results from several studies used to search for astrophysical sources of high-energy neutrinos using the Super-Kamiokande-I (April 1996 to July 2001) neutrino-induced upward-going muon data. The data set consists of 2359 events with minimum energy 1.6 GeV, of which 1892 are through-going and 467 stop within the detector. The results of several independent analyses are presented, including searches for point sources using directional and temporal information and a search for signatures of cosmic-ray interactions with the interstellar medium in the upward-going muons. No statistically significant evidence for point sources or any diffuse flux from the plane of the galaxy was found, so specific limits on fluxes from likely point sources are calculated. The 90% C.L. upper limits on upward-going muon flux from astronomical sources which are located in the southern hemisphere and always under the horizon for Super-Kamiokande are 1~4x10^{-15} cm^{-2} s^{-1}. astro-ph/0606414 [[11]abs, [12]ps, [13]pdf, [14]other] : Title: Chandra Observations of Galactic Center: High Energy Processes at Arcsecond Resolution Authors: [15]Q. Daniel Wang (UMass) Comments: 10 pages, an invited talk presented in the GC2006 workshop, high-resolution version available at [16]this http URL About 2 million seconds of Chandra observing time have been devoted to the Galactic center (GC), including large-scale surveys and deep pointings. These observations have led to the detection of about 4000 discrete X-ray sources and the mapping of diffuse X-ray emission in various energy bands. In this review, I first summarize general results from recent studies and then present close-up views of the three massive star clusters (Arches, Quintuplet, and GC) and their interplay with the Galactic nuclear environment. astro-ph/0606415 [[17]abs, [18]ps, [19]pdf, [20]other] : Title: The alignment of dark matter halos with the cosmic web Authors: [21]Santiago G. Patiri, [22]Antonio J. Cuesta, [23]Francisco Prada, [24]Juan Betancort-Rijo, [25]Anatoly Klypin Comments: 4 pages, 1 figure, submitted to ApJ Letters We investigate the orientation of the axes and angular momentum of dark matter halos with respect to their neighboring voids using high resolution N-body cosmological simulations. We find that the minor axis of halos tends to be aligned along the line joining the halo with the center of the void, and that the major axis is perpendicular to this line. However, we find that the angular momentum of halos does not have any particular orientation. These results may provide information about the mechanisms whereby the large-scale structure of the Universe affects galaxy formation and cast light upon the issue of the orientation of galaxy disks with respect to their host halos. References 1. http://arxiv.org/rss/astro-ph 2. http://www.arxiv.org/ 3. http://www.arxiv.org/list/astro-ph/recent 4. http://www.arxiv.org/help 5. http://www.arxiv.org/find 6. http://www.arxiv.org/abs/astro-ph/0606413 7. http://www.arxiv.org/ps/astro-ph/0606413 8. http://www.arxiv.org/pdf/astro-ph/0606413 9. http://www.arxiv.org/format/astro-ph/0606413 10. http://www.arxiv.org/find/astro-ph/1/au:+al%2E_K/0/1/0/all/0/1 11. http://www.arxiv.org/abs/astro-ph/0606414 12. http://www.arxiv.org/ps/astro-ph/0606414 13. http://www.arxiv.org/pdf/astro-ph/0606414 14. http://www.arxiv.org/format/astro-ph/0606414 15. http://www.arxiv.org/find/astro-ph/1/au:+Wang_Q/0/1/0/all/0/1 16. http://www.astro.umass.edu/~wqd/papers/arches/gc2006.pdf 17. http://www.arxiv.org/abs/astro-ph/0606415 18. http://www.arxiv.org/ps/astro-ph/0606415 19. http://www.arxiv.org/pdf/astro-ph/0606415 20. http://www.arxiv.org/format/astro-ph/0606415 21. http://www.arxiv.org/find/astro-ph/1/au:+Patiri_S/0/1/0/all/0/1 22. http://www.arxiv.org/find/astro-ph/1/au:+Cuesta_A/0/1/0/all/0/1 23. http://www.arxiv.org/find/astro-ph/1/au:+Prada_F/0/1/0/all/0/1 24. http://www.arxiv.org/find/astro-ph/1/au:+Betancort_Rijo_J/0/1/0/all/0/1 25. http://www.arxiv.org/find/astro-ph/1/au:+Klypin_A/0/1/0/all/0/1