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X-WR-CALDESC:Events for INPA
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TZOFFSETFROM:-0800
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DTSTART:20170312T100000
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DTSTART:20171105T090000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170602T120000
DTEND;TZID=America/Los_Angeles:20170602T130000
DTSTAMP:20260527T211032
CREATED:20170329T170412Z
LAST-MODIFIED:20170503T162501Z
UID:214-1496404800-1496408400@inpa.lbl.gov
SUMMARY:Jose Ezquiaga (UAM) - Testing dark energy and gravity with the speed of gravitational waves
DESCRIPTION:LIGO’s gravitational waves (GWs) detection has inaugurated an era to test the foundations of gravity. This includes also probing the nature of Dark Energy. Theories explaining the present acceleration of the Universe beyond the cosmological constant typically require adding extra gravitational degrees of freedom. This can lead to distinct signatures in the propagation of GWs. I will review current tests of gravity over different scales and regimes\, and examine different frameworks describing dynamical dark energy. Then\, focusing on the case of only one additional degree of freedom\, I will present how the speed of GWs could be used to place severe constraints on generic scalar-tensor theories of gravity. I will describe under which circumstances an anomalous propagation speed can arise\, and how it could be measured in the near future. If there is a small deviation from the speed of light\, the delay between the GW and any electromagnetic counterpart will run beyond human time scales. Still\, this measurement could be achieved with LISA using eclipsing white dwarf binaries. This test will either eliminate many contender models for cosmic acceleration or wreck a fundamental pillar of general relativity.
URL:https://inpa.lbl.gov/event/jose-esquiaga-uam/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170609T120000
DTEND;TZID=America/Los_Angeles:20170609T130000
DTSTAMP:20260527T211032
CREATED:20170512T204117Z
LAST-MODIFIED:20170602T234202Z
UID:237-1497009600-1497013200@inpa.lbl.gov
SUMMARY:Giovanni Benato (LBNL) - Discovery probability of next-generation neutrinoless double-β decay experiments
DESCRIPTION:Neutrinoless double beta (0νββ) decay is the only process which can feasibly investigate the\nMajorana nature of neutrinos and total lepton number conservation.\nA broad international experimental program requiring considerable resources is being mounted to search for 0νββ decay in the region of parameter space allowed for Inverted Ordering.\nThe Bayesian discovery probability of future experiments searching for 0νββ decay is evaluated.\nA Bayesian global fit is performed to construct a probability distribution for the effective Majorana mass\, the observable of interest for these experiments. This probability distribution is then combined with the sensitivity of each experiment derived from a heuristic counting analysis. The discovery probability strongly depends on whether the neutrino mass ordering is normal or inverted\, and is found to be higher than previously considered for both mass orderings. In the absence of neutrino mass mechanisms that drive the lightest state or the effective Majorana mass to zero\, for the inverted ordering next-generation experiments are likely to observe a signal already during their first operational stages. Even for the normal ordering\, the probability of discovering neutrinoless double-β decay reaches ∼50% or more in the most promising experiments.
URL:https://inpa.lbl.gov/event/giovanni-benato-lbnl-discovery-potential-of-next-generation-neutrinoless-double-beta-decay-experiemnts/
LOCATION:50A-5132- Sessler\, 50A-5132 Sessler Conference Room\, CA
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170623T120000
DTEND;TZID=America/Los_Angeles:20170623T130000
DTSTAMP:20260527T211032
CREATED:20170623T163213Z
LAST-MODIFIED:20170623T163538Z
UID:244-1498219200-1498222800@inpa.lbl.gov
SUMMARY:Samuel Hinton - Bayesian Hierarchical Methods for Supernova Cosmology
DESCRIPTION:In the era of precision cosmology\, systematic uncertainty is quickly becoming the limiting factor in modern cosmological analyses. In my work\, I discuss a method for performing supernova analyses by combining a hierarchical Bayesian framework with Monte-Carlo simulation realisations. This gains both the flexibility and speed of an analytic analysis along with the nuance and complexity of an algorithmic analysis\, allowing for a deeper and more complex analysis.
URL:https://inpa.lbl.gov/event/samuel-hinton-bayesian-hierarchical-methods-for-supernova-cosmology/
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170630T120000
DTEND;TZID=America/Los_Angeles:20170630T130000
DTSTAMP:20260527T211032
CREATED:20170629T224855Z
LAST-MODIFIED:20170629T224855Z
UID:246-1498824000-1498827600@inpa.lbl.gov
SUMMARY:Eddie Schlafly (LBNL) - Mapping the Galaxy's Dust in 3D
DESCRIPTION:The Milky Way’s dust is of basic importance in astronomy. It\nis both crucial to the formation of stars and is a pervasive\nobservational nuisance.  Despite the dust’s importance\, existing dust\nmaps are largely limited to two dimensions\, with the distance to the\ndust unknown.  The advent of large surveys like Pan-STARRS1 has\nallowed us to map dust in three dimensions in unprecedented detail. In\nthis talk\, I will describe how we use observations of stars in the\nMilky Way to map dust\, and I will discuss three major results: a\ncatalog of distances to major molecular clouds\, the discovery of a 100\npc ring of dust in Orion\, and the 3D dust map itself.  Upcoming\nsurveys promise continued scientific returns: Gaia\, DECam\, and LSST\nwill provide more precise and deeper data than ever before\, enabling\nunique maps of the Galaxy’s spiral structure and the study of the\ndust’s properties in 3D.
URL:https://inpa.lbl.gov/event/eddie-schlafly-lbnl-mapping-the-galaxys-dust-in-3d/
LOCATION:50A-5132- Sessler\, 50A-5132 Sessler Conference Room\, CA
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