Exoplanet's hot spot
in wrong place
DR EMILY BALDWIN
ASTRONOMY NOW
Posted: 20 October 2010 ...
Hot Spot
In radio astronomy, a bright spot in a radio lobe.
Hubble's Law ...
Hot Spot
center of persistent volcanism, thought to be the surface expression of a rising hot plume in Earth's mantle.
The first hot spot - the brightest in the image at the 5:00 position - was detected in 1996, but now dozens light the ring. the temperatures in the regions range from a few thousand to a million degrees Fahrenheit.
These coronal hot spots give off X-rays in the form of black body radiation. A black body is an object that is hot and radiates some of its energy away in the form of different types of light.
Many objects with jets, especially the powerful FR II radio sources with long and highly collimated jets, show hot spots - compact enhancements in brightness of the lobes. Cygnus A is a prime example.
[ Top of Page ]
192. Hot Spot
In radio astronomy, a bright spot in a radio lobe.
Two "hot spots" on the surface of a neutron star, or in the magnetosphere just above the surface, continuously emit radiation in a narrow "searchlight" pattern.
Except at its volcanic hot spots, Io's surface temperature is well below freezing. Instruments aboard the space probe Galileo measured infrared energy emitted by volcanic hot spots on the satellite's surface.
The vent region of Pele has an intense high-temperature hot spot that is remarkably steady, unlike lava flows that erupt in pulses, spread out over large areas, and then cool over time.
There are also volcanoes that are not produced by continental subduction or sea floor spreading but by hot spots, places where the crust is broken through by the strong upward swell of hot material. Hawaii is an example of this.
were there hot spots and cold spots on the sky? In fact we know that there is one large variation.
Scientists from the University of Texas at Austin who discovered the object believe the hot spot to be an example of early star development with the young star collecting gas and dust from the cloud around it.
With no plate motion, hot spots under the crust stay in a fixed position relative to the surface; this, along with the lower surface gravity, may be the explanation for the giant volcanoes. However, there is no evidence of current volcanic activity.
These are shield volcanoes, similar to those that formed our planet's Hawaiian Islands, and they form over hot spots in Venus' crust.
Creating the first ever thermal map of an extra-Solar planet, the team determined that the planet's dayside hot spot had a temperature of 1,700° F (927° C).
FeII emissions are ubiquitous and one finds them whenever a low-density medium is heated by shock waves, expanding atmospheres or radiation from hot spots or a binary companion. They are thus present in extended envelopes and in stellar chromospheres.
Not too surprisingly, perhaps, a hot spot looms amidst the horns of Taurus, the bull. In between these horn stars you can locate the famous Crab Nebula, a supernova remnant of a once mighty star that blew itself to smithereens on July 4, 1054.
Volcanic activity was considerably higher than today, with numerous hot spots, rift valleys, and eruption of lavas including unusual types such as komatiite.
High above these raging hot spots -- 705 kilometers up, to be exact -- two NASA instruments watch. The instruments are called Moderate Resolution Imaging Spectroradiometers, or MODIS. They fly onboard two NASA satellites.
Roche-lobe overflow causes matter to fall onto an accretion disk around the white dwarf creating a hot spot at the point of impact.
If there were a hot spot on a rapidly rotating object then one would see pulses of emission. An analogy is provided by the beam of a searchlight, or a lighthouse: its bright only when the beam is pointing at you.
This situation means that the light from a U Geminorum star has at least four sources: the two stars, the accretion disk and the hot spot on the accretion disk.
It is magnetic poles, hot spots, volcanoes, fault lines, and deep trenches underneath Earth's seas. It is massive islands, long rivers, and deep canyons. It has caused wars and hatred since the beginning of recorded history.
Accelerated cosmic expansion causes gravitational potential wells and hills to flatten as photons pass through them, producing cold spots and hot spots on the CMB aligned with vast supervoids and superclusters.
The Hubble image reveals a huge ultraviolet atmosphere with a mysterious hot spot on the stellar behemoth's surface.
Primordial 3He on the is measured near hot spots and volcanos. Especially high 3He/4He ratios are measured in regions of high geothermal activity such as Yellowstone and Iceland.
The area, called Amirani, has been known to be the home of a number of volcanic hot spots. The Amirani flow field is indeed a quilt work of dark lava flows.
Some of the hottest spots on Io may reach temperatures as high as 2000 K though the average is much lower, about 130 K. These hot spots are the principal mechanism by which Io loses its heat.
As the planet ages, this core slowly cools. On Earth this cooling takes the form of volcanic and tectonic activity. On the Earth, there are always hot spots somewhere, where heat can escape allowing the core to become more cool.
Tuzo Wilson came up with the idea in 1963 that volcanic chains like the Hawaiian Islands result from the slow movement of a tectonic plate across a "fixed" hot spot deep beneath the surface of the planet....
, much like the Hawaiian Islands ...
The bluish features just north of the equator are regions of reduced cloud cover, similar to the place where the Galileo atmospheric probe entered in 1995. They are called 'hot spots' because the reduced cloud cover allows heat to escape from warmer, ...
Moreover, it will not want to do so because the main source of energy in a universe undergoing a Big Crunch will be a hot spot in the sky arising from an asymmetrical contraction of the universe.
picture exists, for example, in VLA maps (those made by the Very Large Array of radio telescopes near Socorro, N.M., U.S.) of Cygnus A that show two jets emerging from the nucleus of the central galaxy and impacting the lobes at "hot spots" of ...
Second, there are sometimes brightness fluctuations due to heating of the red dwarf's surface by X-rays from the primary. This "hot spot" is periodically lost from view on the far side of the rotating secondary.
Hubble observation also shows hot spots. It's no wonder that we find the various disagreements. It's more surprising that all agree as well as they DO.
 See also: Earth, Light, Planet, Time, Temperature
|
