Persistent circumpolar vortices on the extrasolar giant planet HD 37605 b

Details Persistent circumpolar vortices on the extrasolar giant planet HD 37605 b Persistent circumpolar vortices on the extrasolar giant planet HD 37605 b

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...483l..25l&link_type=abstract

Astronomy and Astrophysics, Volume 483, Issue 3, 2008, pp.L25-L28

Astronomy and Astrophysics

Astrophysics

6

Stars: Planetary Systems, Hydrodynamics, Turbulence

Scientific paper

Aims: We examine the atmospheric dynamics on the extrasolar gas giant HD 37605 b (P=54.2 d). As this planet's orbit is highly eccentric (e=0.737), the intensity of stellar heating varies by a factor of 40 over the course of an orbit. We also consider the effect of cloud formation on the dynamical flows and the temperature evolution resulting from this extremely variable forcing. Methods: We employ a grid-based two-dimensional compressible hydrodynamics code to model the atmosphere of the extrasolar giant planet HD 37605 b. We use a resolution of 512 longitude gridpoints and 257 latitude gridpoints. The stellar heating is simulated using a one-layer, two-frequency, two-stream approximation to true radiative transfer. Results: This time-dependent insolation causes the formation of circumpolar vortices near both poles. These vortices appear to be stable over many orbits, and sequester a large volume of cold air, effectively shielding their interiors from the full blast of irradiation at periastron. Evolution of tracers initially placed within these vortices shows the rate of exchange of material between the interior and exterior of these vortices is small: material initially inside the vortex can be expected to remain in the vortex for ~2 P. We note that this result is contingent upon a cloudless atmosphere; the formation of clouds potentially causes a large reduction in both temperature variation and wind speed.

Affiliated with

Also associated with

No associations

Rating

Persistent circumpolar vortices on the extrasolar giant planet HD 37605 b does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Persistent circumpolar vortices on the extrasolar giant planet HD 37605 b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Persistent circumpolar vortices on the extrasolar giant planet HD 37605 b will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1427530