October 2015

Monday, Oct 12
4:00 pm
TAP Colloquium: Dr. Dimitrios Psaltis
Dr. Dimitrios Psaltis
Steward Observatory

Testing General Relativity with the Event Horizon Telescope
The Event Horizon Telescope will generate the first images of the shadows of the black holes in the Milky Way and in M87.

The observed mm photons will have originated in two of the strongest gravitational fields found in the Universe, encoding during their travel to the Earth the properties of the black-hole spacetimes. In this talk, I will discuss the prospect of performing a new tests of General Relativity with Event Horizon Telescope observations of Sgr A* that are free of the complexities related to the accretion flow. I will address a a small number of outstanding questions related to the scattering screen towards the galactic center that need to be answered in order for these tests to be performed. I will then use results from recent GPU-accelerated ray tracing calculations in conjunction with GRMHD simulations to argue that upcoming observations of Sgr A* with the Event Horizon Telescope will be able to confirm the GR predictions for the size and shape of the black-hole shadow to an accuracy of better than 10%, in a model independent way.

TAP Colloquia
Kuiper Space Sciences: Room 312
Tuesday, Oct 13
3:45 pm
LPL Colloquium: Pia Krause
Pia Krause
University of Cologne

Study of Dynamics and Temperatures in Venus Upper Atmosphere by Ground-Based Observations

Understanding the physical and chemical processes in planetary atmospheres has been an important topic for a long time. General circulation models and meteorological forecast models go from strength to strength the more information they get from scientific observations.

A feasible way of investigating planetary atmospheres is to measure wind and temperatures to gain information about the dynamics and thermal structure. The structure of Venus atmosphere has been the target of intense studies in the past decade. Space- and ground-based observations have shed light on many open questions concerning the thermal and the dynamical behavior of its atmosphere but still many open questions remain. We use Doppler shifted non-LTE emission lines of CO2 at 10 µm to obtain wind velocities and temperatures in Venus' atmosphere at 110 km altitude. These emission lines arise only from insolation so our measurements are bound to the dayside of Venus. To facilitate observations of these lines from the ground, we use heterodyne spectroscopy which is an eminent technique to provide reasonable high spectral resolution.

Since Venus is mostly visible during daytime from the ground a solar telescope - like the McMath-Pierce solar telescope - is most suited for our observations.
Kuiper Space Sciences: Room 312
Tuesday, Oct 13
7:00 pm
LPL Evening Lecture Series: Dr. Veronica Bray
Dr. Veronica Bray
Associate Staff Scientist
Lunar and Planetary Laboratory

Pluto, Up Close and Personal

New Horizons made its closest approach to Pluto on 14th July this year providing our first close up views of the Pluto system. Pluto's surface is remarkably diverse, displaying a range of surface features, terrain ages and compositions. Dr. Bray will present some of the preliminary released results from the Geology/Geophysics and Composition Investigations teams.

The Pluto system has been explored by NASA's New Horizons spacecraft, which made closest approach on 14 July 2015. Pluto's surface is remarkably diverse, in terms of its range of landforms, terrain ages, and albedo , color and composition gradients.

Albedo is the only photometric property we have mapped so far, so this word is sufficient to cover photometry.

This event is free and open to the public. Doors open at 6:30p.m. Parking in university surface parking lots is free after 5 p.m. Please be careful not to park in service or reserved spaces. Metered street parking is also available at no cost after 5 p.m. Parking in the Cherry Avenue Garage is available after 5 p.m. at a cost of $1.00 per hour.
For more information, contact Maria Schuchardt: Maria Schuchardt, 621-4861, or go to the LPL Outreach page.
Kuiper Space Sciences: Room 308
Friday, Oct 16–Sunday, Oct 18
The Art of Planetary Science
An exhibition of art, created from and inspired by the solar system and the scientific data with which we explore it.

Opening Reception: Friday, October 16, 5-9 pm
Weekend Hours: Saturday & Sunday, October 17-18, 1-5 pm

To learn more about this event or how to participate visit the LPL Art page.
Kuiper Space Sciences: Room
Tuesday, Oct 20
3:45 pm
Graduate Student Colloquia: Hamish Hay and Joshua Lothringer
Hamish Hay
Graduate Student in the Department of Planetary Sciences

Numerically Modelling Ocean Dissipation in Icy Satellites: A Comparison of Linear and Bottom Friction

Joshua Lothringer
Graduate Student in the Department of Planetary Sciences

Determining the Atmospheric Nature of Super-Earth and Sub-Neptune Exoplanets
Kuiper Space Sciences: Room 312
Wednesday, Oct 21
7:30 pm
Space Drafts Public Talk Series: Dr. Theodora Karalidi
Dr. Theodora Karalidi
Postdoctoral Researcher
Steward Observatory

Rainbows on Exoplanets: Searching for signs of clouds and life on other worlds
Borderlands Brewing Co.
119 E. Toole Ave.
Borderlands Brewing Co.: Room
Monday, Oct 26
4:00 pm
TAP Colloquium: Dr. Norbert Wex
Dr. Norbert Wex
Senior Staff Scientist
Max Planck Institute for Radio Astronomy

TAP Colloquia
Kuiper Space Sciences: Room 312
Tuesday, Oct 27
3:45 pm
LPL Colloquium: Dr. Amy Lovell
Dr. Amy Lovell
Agnes Scott College
Kuiper Space Sciences: Room 312
Friday, Oct 30
4:30 pm — 5:30 pm
Celebrating the UA Moon Tree
Celebrate The University of Arizona's Moon Tree

The sycamore was grown from a seed that travelled to the moon on the Apollo 14 space flight as part of US Forest Service Research. Generously donated to the University of Arizona in 1976 where it has grown as a landscape icon and reminder of the connections between our planet and space.

Keynote speaker: Jack Roosa son of Apollo 14 Astronaut Stuart Roosa.

See the complete program at: http://arboretum.arizona.edu/celebrating-moon-tree
Kuiper Space Sciences: Room