Texas Astronomers Discover Pulsations in Massive, Crystalized, White Dwarf Star

white dwarf star

Ejected outer shell with a cooling white dwarf star at center [STScI]

McDonald Observatory Press Release

19 June 2013

Astronomers from The University of Texas at Austin and colleagues have used the 2.1-meter Otto Struve Telescope at the university's McDonald Observatory to discover pulsations from the crystalized remnant of a burnt-out star. The finding will allow astronomers to see below the star's atmosphere and into its interior, much like earthquakes allow geologists to study compositions below Earth's surface. The findings appear in the current issue of The Astrophysical Journal Letters. The Texas astronomers made their discovery in collaboration with astronomers from Brazil's Universidade Federal do Rio Grande do Sul, the University of Oklahoma, and the Smithsonian Astrophysical Observatory. The star, GD 518, is roughly 170 light years from Earth in the constellation Draco, but far too faint to be seen without a telescope. It is a white dwarf, a star at the end of its life cycle that is essentially just a burnt-out core, the ashy byproduct of previous epochs of nuclear fusion. more..

Successful Mirror Coatings Smooth Way for HET Upgrade

mirror discussion

[Univ. of Arizona]

31 May 2013

The HETDEX project has passed an important milestone with the successful coating of the three largest mirrors in the wide-field corrector, a system that will focus light from the Hobby-Eberly Telescope's primary mirror and direct it to the scientific instruments. "The coating met all our specifications and it's very durable," says HETDEX principal investigator Gary Hill, the chief astronomer for McDonald Observatory. "There was risk associated with that because we had to transport the mirrors and handle them, and if one of them had broken, the project would have been derailed for several years." The University of Arizona Optical Sciences Center is building the corrector, which consists of four mirrors. more..

HETDEX: Illuminating the Darkness

Professor Paul Shapiro Elected to Chair American Physical Society Division of Astrophysics

prof. paul shapiro

Prof. Paul Shapiro

aps logo

9 May 2013

Paul R. Shapiro, the Frank N. Edmonds, Jr., Regents Professor in Astronomy at The University of Texas at Austin, has been elected to a four-year term to the Chair line of the Division of Astrophysics of the American Physical Society. The American Physical Society (APS) is the principal professional society in physics in North America. Its Division of Astrophysics represents more than 2,400 scientists working in many fields of astrophysics and cosmology. APS division chairs are chosen through votes of all division members. Members elected to the Chair line progress through the top offices in the division. Shapiro will serve as Vice Chair in 2013-2014, Chair-Elect in 2014-2015, Chair in 2015-2016, and Chair Emeritus in 2016-2017. more..

American Physical Society

Texas House, Senate Honor McDonald Observatory for 75 Years of Excellence

texas capitol dome

Texas State Capitol Dome

McDonald Observatory Press Release

23 April 2013

Austin, TX --Today, the Texas House of Representatives and Senate will honor The University of Texas at Austin's McDonald Observatory for 75 years of discovery. The observatory's 75th anniversary is coming up in May 2014. A proclamation sponsored by State Representative Poncho Nevárez (District 74, which includes Jeff Davis and surrounding counties in west Texas) will be read in the House Chamber at approximately 10 a.m. At approximately 11 a.m., a resolution sponsored by State Senator José Rodríguez of El Paso will be read in the Senate Chamber. Representatives from the university will be on hand in both chambers to receive the proclamation and resolution. more..

Anson D'Aloisio Wins Yale University Brouwer Prize

dr. anson d'aloisio

Anson D'Aloisio

Postdoctoral Fellow Anson D'Aloisio has been awarded the 2013 Brouwer prize from the Yale University Department of Astronomy, for his 2011 Ph.D. dissertation "Cosmological Structures and Gravitational Lensing". The Dirk Brouwer Memorial Prize is awarded to students for contributions of unusual merit to astronomy. Dr. D'Aloisio works with Prof. Paul Shapiro, and is also a Research/Educator for the Freshman Research Initiative (FRI) stream "Cosmic Dawn".


More News

Press Office

Program News & Events


Colloquium

None Scheduled

Full Schedule


Weekly Calendar

Astronomy

Physics


Meeting Rooms

Calendar/Reservations


mcd logo

facebooktwitteryou tube

Public Visitors to
McDonald Observatory

mcdonaldobservatory.org

star party

Public Viewing Austin

RLM Hall 16" Telescope
Painter Hall 9" Telescope

Details

Skywatcher's Report


freshman research initiative

Freshman Research Initiative

Cosmic Dawn

Exploring the Universe with White Dwarf Stars


texas cosmology center

Texas Cosmology Center


GMT

Giant Magellan Telescope


hetdex

Hobby-Eberly Telescope
Dark Energy Experiment

Illuminating the Darkness


stardate

StarDate Radio

StarDate Online