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News & Events
CCPP events include astrophysics seminars, high energy seminars, Colloquium, CCPP Brown Bag, etc.. You can view all CCPP events with CCPP Event List or CCPP Event Calendar, you can also click on following links to view CCPP seminar schedules:
Tuesday, November 24, 2009 3:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
Aleks Diamond-Stanic University of Arizona The Growth of Supermassive Black Holes: A Biased View The growth of supermassive black holes can be traced via the observed
luminosities of active galactic nuclei, but for most sources the line
of sight is blocked by gas and dust. Commonly used luminosity
indicators (e.g., X-ray continuum, optical line emission) are often
attenuated by several orders of magnitude, and it is difficult to
accurately estimate extinction corrections. The [O IV] 26 micron line
is more robust because it probes high-ionization gas and suffers
little dust attenuation. Using Spitzer measurements of [O IV] for a
complete sample of 90 local Seyfert galaxies, we find that the
luminosity distributions of obscured and unobscured AGNs are
indistinguishable, even though the obscured sources are systematically
fainter in terms of [O III] optical and 2-10 keV X-ray emission. In
addition, as part of of our work to calibrate the relationship between
[O IV] and AGN intrinsic luminosity, we find that even hard (10-200
keV) X-rays are biased tracers, particularly for Compton-thick
sources. This has important implications for the census of black hole
growth from future X-ray surveys.
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Wednesday, November 25, 2009 Meyer 5th Fl. CCPP LoungeOther
NO HEP SEMINAR DUE TO THANKSGIVING HOLIDAY
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Friday, November 27, 2009 Meyer 5th Fl. CCPP LoungeOther
NO ASTRO SEMINAR DUE TO THANKSGIVING HOLIDAY
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Wednesday, December 2, 2009 2:00 PM Meyer 5th Fl. CCPP LoungeHEP Seminar
Shlomo Razamat SUNY, Stony Brook TBA
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Friday, December 4, 2009 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
David Law UCLA Tidal Disruption in a Triaxial Milky Way Dark Matter Halo: A Revised Model for the Sgr dSph Galaxy Observations of the lengthy stellar streams produced by the tidal destruction of the Sagittarius dwarf spheroidal galaxy (Sgr dSph) can provide strong constraints on the distribution of mass within the Milky Way. However, previous work has yielded conflicting results: while the angular precession of the streams has been thought to indicate an oblate shape for the Galactic halo, the radial velocities of stars in these streams are only reproduced in prolate halo models. I demonstrate that both observational characteristics are naturally reproduced by orbits within a triaxial Milky Way dark matter halo similar to that expected from current CDM theory. I conclude by summarizing the properties of the revised Milky Way --- Sgr system and discuss the possibility of using the Sgr stream to constrain the dark sector equivalence principle.
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Wednesday, December 9, 2009 2:00 PM Meyer 5th Fl. CCPP LoungeHEP Seminar
Erick Weinberg Columbia University TBA
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Friday, December 11, 2009 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
Jennifer Siegal-Gaskins Ohio State Using anisotropy to identify a dark matter signal in diffuse gamma-ray emission with Fermi Dark matter annihilation in Galactic substructure will produce diffuse gamma-ray emission of remarkably constant intensity across the sky, making it difficult to disentangle this Galactic dark matter signal from the extragalactic gamma-ray background. Recent studies have considered the angular power spectrum of the diffuse emission from various extragalactic source classes and from Galactic dark matter. I'll discuss these results and show how the energy dependence of anisotropies in the total measured diffuse emission could be used to confidently identify a signal from dark matter in Fermi data. Finally, I'll present new results demonstrating that anisotropy analysis could significantly extend the sensitivity of current indirect dark matter searches.
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Wednesday, December 16, 2009 2:00 PM Meyer 5th Fl. CCPP LoungeHEP Seminar
Christopher Herzog Princeton University TBA
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Friday, January 22, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Wednesday, January 27, 2010 2:00 PM Meyer 5th Fl. CCPP LoungeHEP Seminar
Gavin Salam
TBA
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Friday, January 29, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
Vincent Desjacques Institute for Theoretical Physics, Zurich TBA
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Friday, February 5, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, February 12, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, February 19, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Wednesday, February 24, 2010 2:00 PM Meyer 5th Fl. CCPP LoungeHEP Seminar
Alexander Turbiner UNAM, Mexico TBA
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Friday, February 26, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, March 5, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, March 12, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, March 26, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, April 2, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Wednesday, April 7, 2010 2:00 PM Meyer 5th Fl. CCPP LoungeHEP Seminar
Samson Shatashvili Trinity College Dublin TBA
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Friday, April 9, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, April 16, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, April 23, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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Friday, April 30, 2010 2:30 PM Meyer 5th Fl. CCPP LoungeAstro Seminar
TBD TBD
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