Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sea level stargazing: Astronomers make key sighting with Florida telescope

01.10.2009
This summer, University of Florida astronomers inaugurated the world’s largest optical telescope on a nearly 8,000-foot mountaintop 3,480 miles away.

But it was a far more modest observatory, located just above sea level in rural Levy County and just down the road from the UF campus, that proved key to a new discovery about what one astronomer termed “one of the weirdest” planets outside our solar system.

Three UF astronomers are among the authors of a paper that will appear Thursday in Astrophysical Journal, the leading journal in astronomy, pinning down the extravagantly unusual orbit of HD 80606b, a Jupiter-sized planet nearly 200 light years away. The astronomers made observations of the planet eclipsing its star from a 41-year-old telescope at the department’s Rosemary Hill Observatory 30 miles west of Gainesville in Bronson.

“Really, the critical data came from Florida and Indiana, because they were in the right place at the right time, and the weather was OK,” said Josh Winn, an assistant professor of physics at the Massachusetts Institute of Technology and the lead author of the paper.

The weather was OK – but just barely. Knicole Colón, a UF astronomy doctoral student who made the observations with UF associate scientist and Rosemary Hill director Francisco Reyes, said the two were blessed with cooperative clouds.

“It was fairly cloudy, and we were somewhat disappointed,” she said. “But it turned out that throughout the night, there was a hole in the cloud cover, right where our star was.”

The Rosemary Hill Observatory was founded in 1967 on an 80-acre site in Levy County less than 140 feet above sea level. It has two telescopes, the larger of which is a 30-inch Tinsley reflecting telescope. Although faculty members and graduate students have used that telescope and its 18-inch companion for research, they serve mainly as teaching tools. For research, astronomers often travel to remote mountaintops where larger, more sophisticated telescopes can capture light from far more distant stars at much finer resolutions — now including the largest of them all, the 34.1-foot Gran Telescopio Canarias, perched at 7,874 feet above sea level on a mountaintop in Spain’s Canary Islands.

The events of the night of June 4, 2009, however, proved that small, simple telescopes can still play starring roles.

On that night, Reyes and Colón joined teams at about a dozen different observatories spread from Massachusetts to Hawaii to observe the planet eclipse its host star, HD 80606.

Astronomers noticed the eclipse for the first time in late February, but they only managed to observe the very end of it. The planet completes one orbit around its star every 111 days, so the next chance for observation came on June 4. The eclipse lasts nearly 12 hours, yet any single observatory can only observe it for a short time between twilight and when the planet and star disappear below Earth’s horizon. As a result, 25 astronomers worked together, relay-race fashion east to west, to capture the event.

Colón said she, Reyes and UF astronomy assistant professor Eric Ford spent several days testing and readying the Rosemary Hill telescope. However, the weather had been poor for weeks, and prospects didn’t look good. On the appointed night, it was too cloudy at the first observatory, in Massachusetts, for successful observations. The Florida observatory was next.

Colón said that despite widespread clouds, she and Reyes located a reference star and zeroed in on HD 80606 just in time for the beginning of the eclipse. The team caught only part of the event, but the next observatory, in Indiana, was able to pick up soon after. All told, six observatories gathered about six hours of observations, capturing more than half of the eclipse. Although most were small, they included the 31-foot Keck I telescope in Hawaii. Ford participated remotely in those observations from Berkeley, Calif.

When Colón uses the Gran Telescopio Canarias, she submits her requirements for observation, then awaits the results from astronomers at the telescope. The Rosemary Hill observations were completely different.

“You are staring at a star as a planet crosses in front of it, which is pretty amazing,” she said. “It’s definitely a unique experience that you can’t get from the remote observing that I do.”

Most planets orbit their stars in a more or less circular shape. But HD 80806b’s orbit is an elongated ellipse, as though someone had grabbed its orbit and squeezed. Astronomers were unsure of the cause of this comet-like orbit, but the leading theory was a companion star’s gravitational pull. By combining their observations of the eclipse, the team demonstrated the planet’s orbit is not aligned with the star’s rotation, which suggests this theory is probably correct, Winn said.

Knicole Colón | EurekAlert!
Further information:
http://www.ufl.edu

Further reports about: Astronomers Eclipse Observatory Telescopio distant stars planets orbit sea level

More articles from Physics and Astronomy:

nachricht New quantum liquid crystals may play role in future of computers
21.04.2017 | California Institute of Technology

nachricht Light rays from a supernova bent by the curvature of space-time around a galaxy
21.04.2017 | Stockholm University

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

Im Focus: Quantum-physical Model System

Computer-assisted methods aid Heidelberg physicists in reproducing experiment with ultracold atoms

Two researchers at Heidelberg University have developed a model system that enables a better understanding of the processes in a quantum-physical experiment...

Im Focus: Glacier bacteria’s contribution to carbon cycling

Glaciers might seem rather inhospitable environments. However, they are home to a diverse and vibrant microbial community. It’s becoming increasingly clear that they play a bigger role in the carbon cycle than previously thought.

A new study, now published in the journal Nature Geoscience, shows how microbial communities in melting glaciers contribute to the Earth’s carbon cycle, a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

7th International Conference on Crystalline Silicon Photovoltaics in Freiburg on April 3-5, 2017

03.04.2017 | Event News

 
Latest News

New quantum liquid crystals may play role in future of computers

21.04.2017 | Physics and Astronomy

A promising target for kidney fibrosis

21.04.2017 | Health and Medicine

Light rays from a supernova bent by the curvature of space-time around a galaxy

21.04.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>