Observational Astronomy

Status of the James Webb Telescope and its Capabilities for Exoplanet Science

The James Webb Space Telescope (JWST) is a large aperture (6.5 meter), cryogenic space telescope with a suite of near and mid-infrared instruments covering the wavelength range of 0.6 µm to 28 µm. JWST’s primary science goal is to detect and characterize the first galaxies. It will also study the assembly of galaxies, stellar and planetary system formation, and the formation and evolution of planetary systems. Dr.

Beyond Kepler: Direct Imaging of Earth-like Planets

Is there another Earth out there? People have been asking this question for over two thousand years, and we finally stand on the verge of answering it. The Kepler mission (which was featured in several of the past SETI talks) will likely find the first ever Earth-sized planet around the habitable zone of another star. This talk is about the next step after Kepler, which might be a mission to directly image Earth-like planets and analyze their spectra for biomarkers such as oxygen, water, and atmosphere.

From Hot Jupiters to Super-Earths: A Survey of Exoplanetary Atmospheres

The past decade has marked a period of great progress in our quest to discover and characterize the properties of the planets outside of our own solar system. Observations of transiting systems, in which the planet periodically passes in front of and then behind its star as seen from the earth, have allowed us to study the properties of these distant worlds in unprecedented detail. Dr.

Cosmic Microwave Background Measurements with the QUaD Experiment

The Cosmic Microwave Background (CMB) radiation has enabled us to probe conditions in the early universe with incredible precision. The QUaD experiment is one of the first to report detailed measurements of the polarization of the CMB, which provides extra information that complements temperature measurements. Dr. Church will discuss the implications of the QUaD data and set the stage for what we can expect from future, more sensitive experiments. 

Kepler: Are There Any Good Worlds Out There?

The Kepler Mission began its science observations just one year ago on March 12, 2009, initiating NASA’s first search for Earth-like planets. Initial results and light curves from Kepler are simply breath-taking, and they reveal as much about the instrument as they do about the stars Kepler observes. I will discuss how much we’ve learned over the past year about the instrument and the stars and how we are modifying the Science Pipeline to reveal small Earth-like planets. 

PAHs and the Diffuse Interstellar Bands: From the Laboratory to Space

The diffuse interstellar bands (DIBs) are absorption features that are seen toward reddened stars. They are caused by the absorption of light by the interstellar medium. Numbering hundreds of bands, the DIBs vary in strengths and in profiles and are detected in the near ultraviolet to the near infrared range. The bands are the signature of carriers that are ubiquitous in the interstellar medium making their identification an essential element for a correct understanding of the nature and the evolution of the interstellar medium.

Asteroseismology in the era of CoRoT and Kepler space missions

After a general introduction into the research field of asteroseismology, we review the highlights achieved from multi-site ground-based campaigns dedicated to carefully selected targets. We show how asteroseismology has the potential to improve stellar evolution models to a level that cannot be achieved by any other method so far.

Mongolian and other Historic Solar Eclipses

Dr. Doyle will discuss some simple solar and lunar eclipse observations (including a new one known as the "Emerald Tiara") as well as some of the historic eclipses that have occurred over the past several millennia, and what we have learned from them. Emphasis will be placed on special eclipse events -- eclipses that stopped wars, that proved the general theory of relativity, and so on. Dr. Doyle will spend some time discussing a special Mongolian eclipse that occurred in the 13th Century that helped to determine the modern rate of rotation of the Earth.

Finding Planets Around Nearby Stars: The Lick-Carnegie Extrasolar Planet Search Program

 There are currently over 350 known extrasolar planets, the vast majority discovered through detection of periodic barycentric reflex motion of the planet's host star via high-precision Doppler radial velocity measurements. The Lick-Carnegie Extrasolar Planet Search Program is one such precision Doppler-based planet survey. It is currently monitoring over 1330 nearby F,G,K, and M stars for planets at 2-3 m/sec precision, and has contributed over 70% of the presently-known exoplanets.

Fermi-LAT Observing the Universe with high-energy gamma-ray eyes

The Fermi Gamma-ray Space Telescope, formerly called GLAST, is a satellite mission designed to measure gamma-rays in the energy range 20 MeV to >300 GeV, with supporting measurements for gamma-ray bursts from 8 keV to 30 MeV. In addition to breakthrough capabilities in energy coverage and localization, the very large field of view enables observations of 20% of the sky at any instant, and the entire sky on a timescale of a few hours.

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