Conférences - Astronomie, astrophysique et cosmologie - États-Unis

American Association of Variable Star Observers

These events are virtual, and you may attend both or either webinar events. None of the webinars are full-day--please visit our web page below for schedule details. Spectroscopy Workshop (Oct. 31, Nov. 6, 7, & 8): Directed by Ken Hudson, and based on his Sacramento Mountain Spectroscopy Workshop. Includes presentations on hardware and software used by amateurs, and introduces projects for contributing to pro/am collaborations. Annual Meeting (Nov. 13, 14, &15): Complete with keynote speakers, presentations by professional and amateur astronomers, AAVSO Observing Section break-out sessions, and more.

AAVSO;     Tél.: [617-354-0484];     Email.: aavso@aavso.org

variable stars, professional-amateur collaborations, astronomy, education, research, spectroscopy

Kavli Institute for Theoretical Physics (KITP)

The circumgalactic medium (CGM) can be viewed as an atmosphere that surrounds a galaxy and sustains star formation within it. Much of what we know about the CGM has come from absorption-line spectroscopy, mainly in the UV band, of gas at temperatures below the galaxy's virial temperature. A comparable amount of hotter gas, closer to the virial temperature, may also be present but has been harder to detect. If it is there, then the properties of the cooler clouds and the hotter ambient medium are likely to be complementary, deeply interwoven, and physically complex. It follows that the physics of cosmic rays, magnetic fields, turbulent mixing layers, conductive interfaces, and shocks may then play a leading role in setting the fate of the multiphase CGM. This conference will examine the evidence for a virial-temperature component along with the observations capable of revealing its properties and its relationship to the cooler components. Probes that complement UV absorption-line observations will be emphasized, including X-ray emission and absorption, UV and optical emission, Sunyaev-Zel'dovich probes, Fast Radio Bursts, and signposts of non-thermal particle acceleration.

Kavli Institute for Theoretical Physics (KITP)

Astrometric, photometric and spectroscopic all-sky surveys provide the first complete, unbiased view of the Galactic population of the most abundant type of stellar remnants: white dwarfs. This wealth of observational data provides an array of opportunities to use white dwarfs as probes of a wide range of astrophysics, including the formation and evolution of stars and planets, the star formation rate of the Galaxy, and the populations of low-frequency gravitational wave sources and progenitors of thermonuclear supernovae. These applications require improved models of these electron-degenerate stars, which in turn rely on developments in the relevant input physics, including equations of state and opacities. This conference will provide a joint platform for experts in the observational and theoretical study of white dwarfs, scientists working on the underlying fundamental physics, and astronomers using white dwarfs as diagnostic tools to gain a panoramic overview of the state-of-the-art, to identify remaining limitations of the current models, and to explore novel scientific opportunities arising from the new data.

UC Santa Barbara, Kavli Institute for Theoretical Physics

Astrometric, photometric and spectroscopic all-sky surveys provide the first complete, unbiased view of the Galactic population of the most abundant type of stellar remnants: white dwarfs. This wealth of observational data provides an array of opportunities to use white dwarfs as probes of a wide range of astrophysics, including the formation and evolution of stars and planets, the star formation rate of the Galaxy, and the populations of low-frequency gravitational wave sources and progenitors of thermonuclear supernovae. These applications require improved models of these electron-degenerate stars, which in turn rely on developments in the relevant input physics, including equations of state and opacities. This conference will provide a joint platform for experts in the observational and theoretical study of white dwarfs, scientists working on the underlying fundamental physics, and astronomers using white dwarfs as diagnostic tools to gain a panoramic overview of the state-of-the-art, to identify remaining limitations of the current models, and to explore novel scientific opportunities arising from the new data.

Institute for Pure and Applied Mathematics (IPAM), UCLA

The aim of this program is to connect efforts of the mathematical and physical sciences communities to address the latest advances and new challenges on the understanding of multi-messenger astronomy. The IPAM program will comprise four workshops, each addressing a different topic: the generation of catalogs of waveform templates; the discussion of the mathematical modeling of the equations governing strong relativistic systems; parameter estimation of astrophysical sources of gravitational waves; and the state of the art of big data and deep learning techniques for GW data analysis.

Physique des hautes énergies, des particules et des champs,    Calcul scientifique

Institute for Pure and Applied Mathematics (IPAM)

The goal of this workshop is to connect statisticians and GW astrophysicists to discuss the current state-of-the-art approaches for parameter estimation in CBC and other GW sources alike and to identify the open issues to improve the status regarding low-latency searches.

Part of the Long Program Mathematical and Computational Challenges in the Era of Gravitational Wave Astronomy