Exoplanet HD 189733b Eclipses Parent Star (NASA, Chandra, 07/29/13)

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    This graphic depicts HD 189733b, the first exoplanet caught passing in front of its parent star in X-rays. As described in our press release , NASA’s Chandra X-ray Observatory and the European Space Agency’s XMM Newton Observatory have been used to observe a dip in X-ray intensity as HD 189733b transits its parent star.

    The main figure is an artist’s impression showing the HD 189733 system, containing a Sun-like star orbited by HD 189733b, an exoplanet about the size of Jupiter. This “hot Jupiter” is over 30 times closer to its star than Earth is to the Sun and goes around the star once every 2.2 days, as determined from previous observations. Also in the illustration is a faint red companion star, which was detected for the first time in X-rays with these observations. This star orbits the main star about once every 3,200 years.

    The inset contains the Chandra image of HD 189733. The source in the middle is the main star and the source in the lower right is the faint companion star. The source at the bottom of the image is a background object not contained in the HD 189733 system.

    The exoplanet itself cannot be seen in the Chandra image, as the transits involve measuring small decreases in X-ray emission from the main star. The authors estimate that the percentage decrease in X-ray light during the transits is about three times greater than the corresponding decrease in optical light. This tells them that the region blocking X-rays from the star is substantially larger than the region blocking optical light from the star, helping to determine the size of the planet's atmosphere. The extended atmosphere implied by these results is shown by the light blue color around the planet. Recent observations of HD 189733b with the Hubble Space Telescope have confirmed that the lower atmosphere of the planet has a deep blue color, due to the preferential scattering of blue light by silicate particles in its atmosphere.

    For about a decade astronomers have known that ultraviolet and X-ray radiation from the main star in HD 189733 are evaporating the atmosphere of its closely orbiting planet over time. The authors of the new study estimate that HD 189733b is losing between 100 million and 600 million kilograms per second. This rate is about 25% to 65% higher than it would be if the planet's atmosphere were not extended.

    At a distance of just 63 light years, HD 189733b is the closest hot Jupiter to Earth, which makes it a prime target for astronomers who want to learn more about this type of exoplanet and the atmosphere around it.

    Chandra was used to make observations of six transits by HD 189733b and the team also used archival data from XMM-Newton for one transit. These results are available online and will appear in the August 10th issue of The Astrophysical Journal.

    Read entire caption/view more images: www.nasa.gov/mission_pages/chandra/multimedia/exoplanet-h...

    Image credit: X-ray: NASA/CXC/SAO/K. Poppenhaeger et al; Illustration: NASA/CXC/M. Weiss

    Caption credit: Harvard-Smithsonian Center for Astrophysics

    Read more about Chandra:
    www.nasa.gov/chandra

    p.s. You can see all of our Chandra photos in the Chandra Group in Flickr at: www.flickr.com/groups/chandranasa/ We'd love to have you as a member!

    _____________________________________________
    These official NASA photographs are being made available for publication by news organizations and/or for personal use printing by the subject(s) of the photographs. The photographs may not be used in materials, advertisements, products, or promotions that in any way suggest approval or endorsement by NASA. All Images used must be credited. For information on usage rights please visit: www.nasa.gov/audience/formedia/features/MP_Photo_Guidelin...

    bibekthecrony, simon_bates, and 89 other people added this photo to their favorites.

    1. © Montse ★;-)) 9 months ago | reply

      Espectacular trabajo;-)) Saludos

      Visto en/Seen in

      Solidaridad contra el cáncer

    2. virgiliomulas. 9 months ago | reply

      Bellísima captura, vista en el Grupo:
      JUEGO SOLIDARIO



      Sube 1 y premia a 3 que están a tu lado

    3. pauline.kehoe 9 months ago | reply

      Stunning capture an amazing sight.

    4. juapero 9 months ago | reply

      Esta foto fue vista en
      This photo was seen in
      *Fotografía y Textos solamente* - *Photography and Texts only*


      Sube 1 y Comenta 2
      Post 1 and Comments 2

    5. © Montse ★;-)) 9 months ago | reply

      Bellísima captura, vista en el Grupo:
      JUEGO SOLIDARIO



      Sube 1 y premia a 3 que están a tu lado

    6. © Montse ★;-)) 9 months ago | reply

      Feliz día;-))

      La paz comienza con una sonrisa... gracias por compartir la tuya con nosotr@s

      No hay camino para la paz, la paz es el camino
      LA PAZ COMIENZA CON UNA ;-))

    7. Peter Jennings NZ 9 months ago | reply

      La paz comienza con una sonrisa... gracias por compartir la tuya con nosotr@s

      No hay camino para la paz, la paz es el camino
      LA PAZ COMIENZA CON UNA ;-))

    8. greatartist 9 months ago | reply

      Stunning picture. I would be interested to know what graphics package was used to generate this image.

    9. .Luigi Mirto/ArchiMlFotoWord 9 months ago | reply

      **************** *********************
      Esta foto fue vista en
      This photo was seen in
      *Fotografía y Textos solamente* - *Photography and Texts only*


      Sube 1 y Comenta 2
      Post 1 and Comments 2

    10. Arts'moonika (Ø) ZZZzzzzz.... 9 months ago | reply

      Une splendeur !!! Et rien de trafiqué, juste la réalité... Enfin presque ;-)

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