Bay Astro – Events of Week of 10/21/2019 and Beyond

This Yahoo group publishes announcements of interesting events related to astronomy and aerospace in the San Francisco Bay Area. This can include events such as astronomy and interesting physical science lectures, club meetings, star parties, air shows and other events of interest mostly to amateur astronomers and science enthusiasts. Many thanks to Ken Lum, who created this event listing.

Monday, 10/21/19 12:10 PM

Campbell Hall, Rm 131
UC Berkeley
Berkeley, CA 94720

Breaking the law? A revised view of the relation between the sizes and masses of galaxies since z~3
Speaker: Lamiya Mowla, Yale

Cost: Free


Tuesday, 10/22/19
11:00 AM – 12:00 PM

Varian Physics Building
382 Via Pueblo Mall
Room 355
Stanford, CA 94305

X-ray Impact on Planet Formation: an experimental view

In this talk, I will introduce how planets are formed in the disk of gas and dust surrounding young stars. Stars like classical T Tauri emit copious amounts of X-rays, in addition to ultraviolet photons, confirmed by Chandra/XMM observations of targets in the Taurus molecular cloud. Soft (<1 keV) and hard (>1 keV) stellar X-rays impinge and are absorbed by the protoplanetary disk during its million year lifetime. Yet, the effects of stellar X-rays on protoplanetary matter remain elusive due to a lack of fundamental X-ray photochemical data. Because X-rays are known to penetrate deeper in matter than UV photons or electrons this could have far-reaching consequences on protoplanetary dust.
To unveil the microphysical effects of X-rays on cosmic dust we tackle this problem using experimental astrophysics. We simulate cosmic dust in protoplanetary disks by using solid-state analogs, and simulate high doses of X-ray radiation using synchrotron radiation at large facilities. Dust nanoparticles are irradiated with X-rays until reaching astrophysically-relevant doses. The samples are examined via X-ray diffraction, infrared and isotopic microprobes. Our experiments show that large doses of X-rays significantly impact the structural, optical and isotopic properties of the smallest dust grains. I will provide an overview of what this means in the context of primordial planet formation and of our future work.

Speaker: Lisseth Gavilan-Marin, NASA Ames


Cost: Free


Tuesday, 10/22/2019. 7 PM

Mt. Diablo Astronomical Society
Lindsay Wildlife Experience
1931 First Avenue
Walnut Creek, CA 94597

Speaker: Professor Graeme Smith, Lick Obs
Topic: Globular clusters



Friday, 10/25/19
10:30 AM – 11:30 AM

Stanford Linear Accelerator (SLAC)
Building 51
3rd Floor Conference room
Menlo Park, CA 94025

Two KIPAC Tea Talks

Relativistic outflows in neutron star mergers

Speaker: Ore Gottlieb, Tel Aviv University


CMB Lensing Tomography at 0

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