“XRbinary”: A Program to Calculate the Orbital Light Curves of X
... The gravity darkening coefficient is equal to 0.25 for stars with radiative envelopes and lies between ∼ 0.05 and ∼ 0.11 for stars with convective envelopes. The gravity darkening coefficient used in the program depends only on temperature and is an approximation to the coefficients for main sequenc ...
... The gravity darkening coefficient is equal to 0.25 for stars with radiative envelopes and lies between ∼ 0.05 and ∼ 0.11 for stars with convective envelopes. The gravity darkening coefficient used in the program depends only on temperature and is an approximation to the coefficients for main sequenc ...
An Unbiased Near-infrared Interferometric Survey for Hot
... evolution of extrasolar planetary systems. However, debris discs that are relatively easy to detect are located several astronomical units (au) to a few hundreds of au from their host stars, and thus only trace the outer regions of planetary systems. In order to study the inner regions close to the ...
... evolution of extrasolar planetary systems. However, debris discs that are relatively easy to detect are located several astronomical units (au) to a few hundreds of au from their host stars, and thus only trace the outer regions of planetary systems. In order to study the inner regions close to the ...
From Hot Jupiters to Hot Neptunes and Below
... If a planetary orbit happens to be seen perfectly edge-on from Earth, the planet transits in front of its host star every orbit. The light of the host star undergoes a dimming proportional to the surface of the transiting planet. This offers a very straightforward means of detecting exoplanets and me ...
... If a planetary orbit happens to be seen perfectly edge-on from Earth, the planet transits in front of its host star every orbit. The light of the host star undergoes a dimming proportional to the surface of the transiting planet. This offers a very straightforward means of detecting exoplanets and me ...
Presentation
... “But if GJ 581g is confirmed by further RV scrutiny, the mere fact that a habitable planet has been detected this soon, around such a nearby star, suggests that [the fraction of stars with potentially habitable planets] could well be on the order of a few tens of percent, and thus that either we hav ...
... “But if GJ 581g is confirmed by further RV scrutiny, the mere fact that a habitable planet has been detected this soon, around such a nearby star, suggests that [the fraction of stars with potentially habitable planets] could well be on the order of a few tens of percent, and thus that either we hav ...
Probability of Finding Terrestrial Planet Within Habitable Zone of
... planet in this system. For the late spectral type we simulated Gl 581-like system with stellar mass of 0.31 M~, luminosity 0.02 L~, and spectral type M3V. The probability of finding venusian or rocky planets within its HZ is 8%. Among 100 systems generated we did not find any gas planet but 52 syste ...
... planet in this system. For the late spectral type we simulated Gl 581-like system with stellar mass of 0.31 M~, luminosity 0.02 L~, and spectral type M3V. The probability of finding venusian or rocky planets within its HZ is 8%. Among 100 systems generated we did not find any gas planet but 52 syste ...
StarPlanetBirth
... http://ircamera.as.arizona.edu/NatSci102/NatSci102/lectures/solarsysform.htm Wandering large planets encounter many smaller objects in the disk engulfing some, ejecting some from the solar system, and flinging many to the edges of the solar system (Oort Cloud, Kuiper Belt, Asteroid Belt) Other model ...
... http://ircamera.as.arizona.edu/NatSci102/NatSci102/lectures/solarsysform.htm Wandering large planets encounter many smaller objects in the disk engulfing some, ejecting some from the solar system, and flinging many to the edges of the solar system (Oort Cloud, Kuiper Belt, Asteroid Belt) Other model ...
Extrasolar planets
... In the mid-20th century exoplanets were set in a tighter focus. The first hints of a terrestrial object orbiting a star other than the Sun were announced at the end of the 1980s. In 1992 the existence of worlds beyond our Solar system was verified by the discovery of a planetary system around the mi ...
... In the mid-20th century exoplanets were set in a tighter focus. The first hints of a terrestrial object orbiting a star other than the Sun were announced at the end of the 1980s. In 1992 the existence of worlds beyond our Solar system was verified by the discovery of a planetary system around the mi ...
{2.} and {4.}
... Constellations are the way that many learn about the sky and help as a memory aid to the stars that form the figures, the constellations did organize this endless wonder, our sky. As scientist looked longer at our sky they categorized stars and found that they could predict their movement, making an ...
... Constellations are the way that many learn about the sky and help as a memory aid to the stars that form the figures, the constellations did organize this endless wonder, our sky. As scientist looked longer at our sky they categorized stars and found that they could predict their movement, making an ...
GALAXIES 626
... Thin disk formation begins early, at z = 2 to 3 Partly disrupted during merger epoch which heats it into thick disk observed now The rest of the gas then gradually settles to form the present thin disk Not much is known about the radial extent of the thick disk. This is important, if the thick disk ...
... Thin disk formation begins early, at z = 2 to 3 Partly disrupted during merger epoch which heats it into thick disk observed now The rest of the gas then gradually settles to form the present thin disk Not much is known about the radial extent of the thick disk. This is important, if the thick disk ...
2 The Diversity of Extrasolar Planets Around Solar Type Stars
... days) is almost exactly half of that of the outer one (443.7 days). Future observations should confirm the 1:2 ratio between the periods. Gravitational interactions between the two planets are expected to be strong. Consequently, a twoKeplerian model will rapidly diverge from the real temporal evolu ...
... days) is almost exactly half of that of the outer one (443.7 days). Future observations should confirm the 1:2 ratio between the periods. Gravitational interactions between the two planets are expected to be strong. Consequently, a twoKeplerian model will rapidly diverge from the real temporal evolu ...
Water ice lines and the formation of giant moons around super
... habitable moons. Here we simulate the accretion disks around super-Jovian planets and find that giant moons with masses similar to Mars can form. Our results suggest that the Galilean moons formed during the final stages of accretion onto Jupiter, when the circumjovian disk was sufficiently cool. In ...
... habitable moons. Here we simulate the accretion disks around super-Jovian planets and find that giant moons with masses similar to Mars can form. Our results suggest that the Galilean moons formed during the final stages of accretion onto Jupiter, when the circumjovian disk was sufficiently cool. In ...
IAC_L2_thindisk
... gradient for the clusters older that 2.5 Gyr is a bit steeper than for the cepheids. Consistent with inside-out disk formation. The -enhancement of outer clusters similar to that for outer stars (i.e. like thin disk sequence). Yong et al 2012 ...
... gradient for the clusters older that 2.5 Gyr is a bit steeper than for the cepheids. Consistent with inside-out disk formation. The -enhancement of outer clusters similar to that for outer stars (i.e. like thin disk sequence). Yong et al 2012 ...
Reflected Light from Giant Planets in Habitable Zones
... of planets not predicted by existing models of planetary formation: hot-Jupiters, giant planets in extremely short period orbits. This groundbreaking discovery challenged the accepted cannons regarding planetary systems architecture and led to the reformulation of planetary formation theories as wel ...
... of planets not predicted by existing models of planetary formation: hot-Jupiters, giant planets in extremely short period orbits. This groundbreaking discovery challenged the accepted cannons regarding planetary systems architecture and led to the reformulation of planetary formation theories as wel ...
The accretion disk paradigm for young stars
... continuum and the emission lines must be produced in a circumstellar fringe or extended chromosphere”. 2.1. 1940s and 1950s: first TTS models The first model for TTSs that emerged shortly after their discovery was motivated by their association with dark nebulae. These stars, postulated e.g. Struve & ...
... continuum and the emission lines must be produced in a circumstellar fringe or extended chromosphere”. 2.1. 1940s and 1950s: first TTS models The first model for TTSs that emerged shortly after their discovery was motivated by their association with dark nebulae. These stars, postulated e.g. Struve & ...
Star Trek ObservING List - Adirondack astronomy retreat
... It is said that Epsilon Eridani really has a planet. It was discovered by a man named W. Cochran on August 7th, 2000. His name is a real coincidence because a man named Zefram Cochrane, according to Star Trek TNG First Contact movie and TOS episode Metamorphosis, was the inventor of the warp drive w ...
... It is said that Epsilon Eridani really has a planet. It was discovered by a man named W. Cochran on August 7th, 2000. His name is a real coincidence because a man named Zefram Cochrane, according to Star Trek TNG First Contact movie and TOS episode Metamorphosis, was the inventor of the warp drive w ...
Stellar Metamorphosis as Alternative to Nebular Hypothesis
... of tons of star shrapnel known as asteroids, meteorites and small moon-like objects that are undifferentiated. [26] Therefore TYC 8241 2652 is not evidence of star/planet formation but star/planet destruction caused by objects clearing their path for more stable orbits. [27] Mainstream has this proc ...
... of tons of star shrapnel known as asteroids, meteorites and small moon-like objects that are undifferentiated. [26] Therefore TYC 8241 2652 is not evidence of star/planet formation but star/planet destruction caused by objects clearing their path for more stable orbits. [27] Mainstream has this proc ...
The Young Stars
... overtone bands of CO, observed as deep broad absorption in the infrared, to identify FU Ori disks. The band emission is produced in the hot inner disk through many overlapping lines from the vibrationally excited molecule. In addition, post-eruption optical spectra show peculiar supergiant F and G t ...
... overtone bands of CO, observed as deep broad absorption in the infrared, to identify FU Ori disks. The band emission is produced in the hot inner disk through many overlapping lines from the vibrationally excited molecule. In addition, post-eruption optical spectra show peculiar supergiant F and G t ...
a transiting planet of a sun-like star
... A planet transits an 11th magnitude, G1 V star in the constellation Corona Borealis. We designate the planet XO-1b and the star XO-1, also known as GSC 02041-01657. XO-1 lacks a trigonometric distance; we estimate it to be 200 20 pc. Of the 10 stars currently known to host extrasolar transiting pl ...
... A planet transits an 11th magnitude, G1 V star in the constellation Corona Borealis. We designate the planet XO-1b and the star XO-1, also known as GSC 02041-01657. XO-1 lacks a trigonometric distance; we estimate it to be 200 20 pc. Of the 10 stars currently known to host extrasolar transiting pl ...
Star Magnitude - ScienceEducationatNewPaltz
... With the invention of the telescope and modern equipment to measure star magnitudes the scale has been extended in both directions. Dimmer stars are assigned magnitudes larger than 6 ( 6, 7, 8, 9, ... 30th ... etc.) The Hubble Space Telescope Deep Field image contains some galaxies as faint as 30th ...
... With the invention of the telescope and modern equipment to measure star magnitudes the scale has been extended in both directions. Dimmer stars are assigned magnitudes larger than 6 ( 6, 7, 8, 9, ... 30th ... etc.) The Hubble Space Telescope Deep Field image contains some galaxies as faint as 30th ...
radioactive age dating
... • The planets, satellites, comets, asteroids, and the Sun itself formed from the same cloud of interstellar gas and dust • The composition of this cloud was shaped by cosmic processes, including nuclear reactions that took place within stars that died long before our solar system was formed • Differ ...
... • The planets, satellites, comets, asteroids, and the Sun itself formed from the same cloud of interstellar gas and dust • The composition of this cloud was shaped by cosmic processes, including nuclear reactions that took place within stars that died long before our solar system was formed • Differ ...
formation of the outer planets
... than Jupiter within 2 AU. Some of these planets have very eccentric orbits. Within about 5 AU of sunlike stars, Jupiter-mass planets are more common than planets of several Jupiter masses, and substellar companions that are more than ten times as massive as Jupiter are rare (Mayor et al., 2004; Marc ...
... than Jupiter within 2 AU. Some of these planets have very eccentric orbits. Within about 5 AU of sunlike stars, Jupiter-mass planets are more common than planets of several Jupiter masses, and substellar companions that are more than ten times as massive as Jupiter are rare (Mayor et al., 2004; Marc ...
PLANET FORMATION AP Boss Department of Terrestrial Magnetism
... these objects are indeed gas giant planets: the planet's mass is approximately 0.7 Jupiter masses, with a radius and a density (Mazeh et al., 2000) roughly equal to that expected for a hot Jupiter. In addition, sodium has been detected in the atmosphere of HD 209458's planet (Charbonneau et al., 200 ...
... these objects are indeed gas giant planets: the planet's mass is approximately 0.7 Jupiter masses, with a radius and a density (Mazeh et al., 2000) roughly equal to that expected for a hot Jupiter. In addition, sodium has been detected in the atmosphere of HD 209458's planet (Charbonneau et al., 200 ...
UvA-DARE (Digital Academic Repository)
... (vortices) can trap large numbers of particles, making them susceptible to gravitational collapse directly into much larger bodies (e.g. Johansen et al. 2006) before they can drift or fragment. The size distribution of asteroids in the solar system indicates that they indeed formed in this way, skip ...
... (vortices) can trap large numbers of particles, making them susceptible to gravitational collapse directly into much larger bodies (e.g. Johansen et al. 2006) before they can drift or fragment. The size distribution of asteroids in the solar system indicates that they indeed formed in this way, skip ...
radioactive age dating
... own characteristic rate, called its half-life, which can be measured in the laboratory • This is the key to a technique called radioactive age dating, which is used to determine the ages of rocks • The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that surviv ...
... own characteristic rate, called its half-life, which can be measured in the laboratory • This is the key to a technique called radioactive age dating, which is used to determine the ages of rocks • The oldest rocks found anywhere in the solar system are meteorites, the bits of meteoroids that surviv ...
Beta Pictoris
Beta Pictoris (β Pic, β Pictoris) is the second brightest star in the constellation Pictor. It is located 63.4 light years from our solar system, and is 1.75 times as massive and 8.7 times as luminous as the Sun. The Beta Pictoris system is very young, only 8–20 million years old, although it is already in the main sequence stage of its evolution. Beta Pictoris is the title member of the Beta Pictoris moving group, an association of young stars which share the same motion through space and have the same age.Beta Pictoris shows an excess of infrared emission compared to normal stars of its type, which is caused by large quantities of dust and gas (including carbon monoxide) near the star. Detailed observations reveal a large disk of dust and gas orbiting the star, which was the first debris disk to be imaged around another star. In addition to the presence of several planetesimal belts and cometary activity, there are indications that planets have formed within this disk and that the processes of planet formation may still be ongoing. Material from the Beta Pictoris debris disk is thought to be the dominant source of interstellar meteoroids in our solar system.The European Southern Observatory (ESO) has confirmed the presence of a planet, Beta Pictoris b, matching previous predictions, through the use of direct imagery, orbiting in the plane of the debris disk surrounding the star. This planet is currently the closest extrasolar planet to its star ever photographed: the observed separation is roughly the same as the distance between Saturn and the Sun.