Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




STELLAR CHEMISTRY
Discovery Of A Pulsating Star That Hosts A Giant Planet
by Staff Writers
Barcelona, Spain (SPX) Jan 19, 2011


Illustration only.

Recently published in an article of the Astronomy and Astrophysics journal, a group of researchers from the Institute of Space Sciences (IEEC-CSIC) at Universitat Autonoma de Barcelona has discovered, for the first time, a delta Scuti pulsating star that hosts a hot giant transiting planet.

The study was carried out by the PhD student, Enrique Herrero, the researcher Dr. Juan Carlos Morales, the exoplanet expert, Dr. Ignasi Ribas, and the amateur astronomer, Mr. Ramon Naves.

WASP-33 (also known as HD15082) is hotter, more massive than the Sun (1.5 Msun) and is located at a distance of 378 light years away, in the constellation of Andromeda.

It has the peculiarity of being a star that pulsates radially, like a balloon that inflates and deflates continuously, and non-radially, like the tides in Earth's oceans caused by the presence of the moon, which deforms the bodies of water between the poles and the equator.

This star hosts a giant planet, WASP-33b, that was detected in 2006 through the transiting method. The planet's mass is four times the mass of Jupiter and it orbits the star at such a high speed that it only takes 1.2 days to complete its orbit.

This very short orbital period indicates its extreme proximity to the star, 0.02 astronomical units (AU) when Mercury, the closest planet to the Sun, is at 0.39 AU. This planet is quite particular because it has a retrograde orbit and, evenmore, its orbit is quite inclined in angle respect to the star's equator.

The study also suggests that the star's pulsations could be caused by the presence of the giant planet, something never seen before in any other planetary system.

A small periodic signal, visible in the overall signal during the transit of the planet, called the attention of the researchers and through a thorough study, the pulsating modes of the star were determined and their possible relationship with the planet.

Apart from being a pioneering study in the field, it is noteworthy to mention that the observations have been obtained from professional and amateur observatories.

For the first time in its recent activity history, the Montsec Astronomical Observatory (OAdM) has provided most of the observations used for this research. In addition, the amateur astronomer R. Naves, from the Montcabrer Observatory, has provided excellent data, revealing the great importance of Professional-Amateur collaborations in this field.

Therefore, the WASP-33 system represents a landmark in the world of exoplanets since it may provide vital information on pulsations modes that occur in stars, the effects of tides between stars and planets and the dynamical evolution of planetary systems.

.


Related Links
Universitat Autonoma de Barcelona
Stellar Chemistry, The Universe And All Within It






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





STELLAR CHEMISTRY
Chandra Images Torrent Of Star Formation
Boston MA (SPX) Jan 17, 2011
A new Chandra X-ray Observatory image of Messier 82, or M82, shows the result of star formation on overdrive. M82 is located about 12 million light-years from Earth and is the nearest place to us where the conditions are similar to those when the Universe was much younger with lots of stars forming. M82 is a so-called starburst galaxy, where stars are forming at rates that are tens or even ... read more


STELLAR CHEMISTRY
Lunar water may have come from comets - scientists

Moon Has Earth-Like Core

The Hunt For The Lunar Core

Rocket City Space Pioneers Announce Partnership With Solidworks

STELLAR CHEMISTRY
Next Mars Rover Will Check For Ingredients Of Life

Scanning The Red Planet

Mars Desert Research Station 2011 Field Season Begins

Rover Continues To Explore Santa Maria Crater

STELLAR CHEMISTRY
Special Aerospace Services Holds First Annual Commercial Human Spaceflight Tech Forum

Space agencies challenge kids to 'train like astronauts'

Voyager spacecraft going strong at age 33

Taiwan develops face-recognising vending machine

STELLAR CHEMISTRY
China Builds Theme Park In Spaceport

Tiangong Space Station Plans Progessing

China-Made Satellite Keeps Remote Areas In Venezuela Connected

Optis Software To Optimize Chinese Satellite Design

STELLAR CHEMISTRY
Japan delays space cargo launch

Cosmonauts To Perform 27th Russian ISS Spacewalk

Gardening In Space With HydroTropi

ATV Johannes Kepler Gears Up For Space Journey

STELLAR CHEMISTRY
Arianespace Announces Eutelsat Contract

ATM Is Readied For Its February Launch On Ariane 5

Arianespace Will Have A Record Year Of Launch Activity In 2011

2011: The Arianespace Family Takes Shape

STELLAR CHEMISTRY
Inclined Orbits Prevail

Inclined Orbits Prevail In Exoplanetary Systems

Planet Affects A Star's Spin

Kepler Mission Discovers Its First Rocky Planet

STELLAR CHEMISTRY
Steve Jobs surrenders reins as Apple thrives

Crosslink Capability Between STSS Demonstration Satellites Verified

Apple's Asian partners and rivals eye Jobs' health

ViviSat Launched




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement