La Sapienza – 2015
... • So far no planets detected • Gaia space mission will measure stellar parallaxes with unprecedented precision • Gaia space mission will feature accuracy of ~30micro arc-sec • Gaia is predicted to discover 10,000 planets using astrometry in our local surrounding alone ...
... • So far no planets detected • Gaia space mission will measure stellar parallaxes with unprecedented precision • Gaia space mission will feature accuracy of ~30micro arc-sec • Gaia is predicted to discover 10,000 planets using astrometry in our local surrounding alone ...
variation in the pre-transit balmer line signal around
... be selected. Since all of the absorption is measured relative to the master comparison spectrum, choosing different spectra will increase or decrease the measured absorption values. Thus the true zero-point is difficult to determine for the small window of time that a single night of observing provid ...
... be selected. Since all of the absorption is measured relative to the master comparison spectrum, choosing different spectra will increase or decrease the measured absorption values. Thus the true zero-point is difficult to determine for the small window of time that a single night of observing provid ...
Full Program with Abstracts - CIERA
... planets and planetary systems orbiting main sequence stars. Exoplanet discoveries spill into the thousands, and the sensitivity boundaries continue to expand. NASA's Kepler Mission unveiled a galaxy replete with small planets and revealed populations that don't exist in our own solar system. The mis ...
... planets and planetary systems orbiting main sequence stars. Exoplanet discoveries spill into the thousands, and the sensitivity boundaries continue to expand. NASA's Kepler Mission unveiled a galaxy replete with small planets and revealed populations that don't exist in our own solar system. The mis ...
Worlds Beyond: A Strategy for the Detection and Characterization of
... fitting formulas of Fortney et al. (2007) (specifically, loge was used instead of log10 ). Fig. 1 shows the original and corrected mass-radius relations. The most important effect of this error was to make the prospects for using JWST/NIRSpec to characterize the atmospheres of transiting planets app ...
... fitting formulas of Fortney et al. (2007) (specifically, loge was used instead of log10 ). Fig. 1 shows the original and corrected mass-radius relations. The most important effect of this error was to make the prospects for using JWST/NIRSpec to characterize the atmospheres of transiting planets app ...
Downloaded - Royal Society Open Science
... asteroids, comets or pebbles is too restrictive for the strikingly diverse field of post-MS planetary science. The term also includes brown dwarfs, for which many physical relations presented here also apply. ‘Planetary systems’ is defined as systems which include SBs. The ‘disambiguation’ equations ...
... asteroids, comets or pebbles is too restrictive for the strikingly diverse field of post-MS planetary science. The term also includes brown dwarfs, for which many physical relations presented here also apply. ‘Planetary systems’ is defined as systems which include SBs. The ‘disambiguation’ equations ...
Super-Earth and Sub-Neptune Exoplanets: a First Look from the
... place where photosynthesis happens, and it carries that message with it as it departs the Solar System, broadcasting into the cosmos that our planet teems with life. If global photosynthetic life thrives on an extrasolar planet, we might be able to detect it. A large telescope, equipped with a sensi ...
... place where photosynthesis happens, and it carries that message with it as it departs the Solar System, broadcasting into the cosmos that our planet teems with life. If global photosynthetic life thrives on an extrasolar planet, we might be able to detect it. A large telescope, equipped with a sensi ...
Disk planet interaction during the formation of extrasolar planets
... embryos, and later to proto-planets [2]. Planetesimals, formed from gas and dust particles, then accumulates via binary collisions and planets form in less than roughly 1 Myr and in less than roughly 100 Myr terrestrial planets has been assembled in the inner disc. Outside the radius where it was co ...
... embryos, and later to proto-planets [2]. Planetesimals, formed from gas and dust particles, then accumulates via binary collisions and planets form in less than roughly 1 Myr and in less than roughly 100 Myr terrestrial planets has been assembled in the inner disc. Outside the radius where it was co ...
Analysis of Stellar Activity and Orbital Dynamics in Extrasolar
... The area of exoplanet research, which emerged less than two decades ago, was revolutionized with the advent of space-based photometers like CoRoT and Kepler. These observatories provide long-term monitoring of thousands of stars with unprecendented accuracy and high time resolution to detect transit ...
... The area of exoplanet research, which emerged less than two decades ago, was revolutionized with the advent of space-based photometers like CoRoT and Kepler. These observatories provide long-term monitoring of thousands of stars with unprecendented accuracy and high time resolution to detect transit ...
A Search for Extrasolar Planets Using Echoes Produced in Flare
... The variable nature of stars has a long documented history. In any portion of the sky, stars can be found in various states from quiescence to obliteration. Of the myriad of observable characteristics on either short or long timescales compared to a human lifetime, a particular type of short-term va ...
... The variable nature of stars has a long documented history. In any portion of the sky, stars can be found in various states from quiescence to obliteration. Of the myriad of observable characteristics on either short or long timescales compared to a human lifetime, a particular type of short-term va ...
Chap2-RadialVelocity
... 2.5 Properties of radial velocity planets 2.6 Multiple planet systems 2.7 Planets around binary and multiple stars ...
... 2.5 Properties of radial velocity planets 2.6 Multiple planet systems 2.7 Planets around binary and multiple stars ...
Search for an exosphere around 51 Pegasi B with ISO
... with planetary eclipses. Only recently a transit event has been observed in HD209458 (G0V) (Henry et al. 1999). Evolution models predict that the planetary companions are able to survive the huge stellar insolation, and that they should have radii slightly above the radius of Jupiter (RJ ≈ 70000km) ...
... with planetary eclipses. Only recently a transit event has been observed in HD209458 (G0V) (Henry et al. 1999). Evolution models predict that the planetary companions are able to survive the huge stellar insolation, and that they should have radii slightly above the radius of Jupiter (RJ ≈ 70000km) ...
Discovery and spectroscopy of the young Jovian planet
... Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA. 2Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94040, USA. 3Department of Astronomy, University of California–Berkeley, Berkeley, CA, 94720, USA. 4Lunar and Planetary Labo ...
... Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, Stanford, CA 94305, USA. 2Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94040, USA. 3Department of Astronomy, University of California–Berkeley, Berkeley, CA, 94720, USA. 4Lunar and Planetary Labo ...
Giuseppe Piazzi and the Discovery of Ceres
... of Right Ascension, and 16°8' of northern declination. On the 11th its motion, until then retrograde westwards, changed into direct motion eastwards; on the 23rd it had a right ascension of 51°46' and a northern declination of 17°8'. I shall continue to observe it and I hope to be able to observe it ...
... of Right Ascension, and 16°8' of northern declination. On the 11th its motion, until then retrograde westwards, changed into direct motion eastwards; on the 23rd it had a right ascension of 51°46' and a northern declination of 17°8'. I shall continue to observe it and I hope to be able to observe it ...
Mean-Motion Resonances as a Source for Infalling Comets toward
... So, we can conclude that the n6 mechanism is highly nongeneric and that it should not be expected to be at work in other planetary systems different from our Solar System. Indeed, if the planets had different masses or different mutual distances the power of the n6 resonance would be considerably re ...
... So, we can conclude that the n6 mechanism is highly nongeneric and that it should not be expected to be at work in other planetary systems different from our Solar System. Indeed, if the planets had different masses or different mutual distances the power of the n6 resonance would be considerably re ...
The Habitability of Proxima Centauri b I: Evolutionary Scenarios
... and NLTE effects, which make it extraordinarily difficult to identify elemental abundances; hence its composition is far more difficult to measure than for G and K dwarfs like α Cen A and B (Johnson & Apps 2009). Recently, Hinkel & Kane (2013) completed a reanalysis of published compositional studie ...
... and NLTE effects, which make it extraordinarily difficult to identify elemental abundances; hence its composition is far more difficult to measure than for G and K dwarfs like α Cen A and B (Johnson & Apps 2009). Recently, Hinkel & Kane (2013) completed a reanalysis of published compositional studie ...
Spin-driven tidal pumping: Tidally driven changes in planetary spin
... star and on the planet (e.g. Jeffreys 1961, Goldreich and Soter 1966, Kaula 1968, Jackson et al. 2008). The tides also affect semi-major axes a, whose changes can modify e-damping rates on comparable timescales (Jackson et al. 2008). Evolution becomes more complex and interesting in multiplanet syst ...
... star and on the planet (e.g. Jeffreys 1961, Goldreich and Soter 1966, Kaula 1968, Jackson et al. 2008). The tides also affect semi-major axes a, whose changes can modify e-damping rates on comparable timescales (Jackson et al. 2008). Evolution becomes more complex and interesting in multiplanet syst ...
TWO NEW LONG-PERIOD GIANT PLANETS FROM THE
... as the most probable mass and age, while the 1σ-like widths were used to estimate the errors. Contrary to a more common practice, we did not use parallaxes in our mass and age determinations. This is because one of our stars, HD 95872, does not have a reliable measurement of trigonometric parallax; ...
... as the most probable mass and age, while the 1σ-like widths were used to estimate the errors. Contrary to a more common practice, we did not use parallaxes in our mass and age determinations. This is because one of our stars, HD 95872, does not have a reliable measurement of trigonometric parallax; ...
Looking for planets with SPHERE in planetary systems with double
... Debris disks are optically thin, almost gas-free dusty disks observed around a significant fraction of main-sequence stars older than about 10 Myr. Since the circumstellar dust is short-lived, the very existence of these disks is considered as an evidence that dust-producing planetesimals are still ...
... Debris disks are optically thin, almost gas-free dusty disks observed around a significant fraction of main-sequence stars older than about 10 Myr. Since the circumstellar dust is short-lived, the very existence of these disks is considered as an evidence that dust-producing planetesimals are still ...
allowed planetary orbits
... Hence, we pass to theories of the origin of the solar system and demonstrations of the chaotic dynamics and planetary migration, which at present lead to new theories of the origin of the solar system and exoplanets. We provide a review of the quantization on a cosmic scale and its application to de ...
... Hence, we pass to theories of the origin of the solar system and demonstrations of the chaotic dynamics and planetary migration, which at present lead to new theories of the origin of the solar system and exoplanets. We provide a review of the quantization on a cosmic scale and its application to de ...
Constraining tidal dissipation in F-type main
... their main-sequence lifetime, thus significantly improving their age estimate from model isochrone fitting in comparison with lower mass stars. A good age estimate is important to constrain the average value of Q by modelling the tidal evolution of a particular system (cf. Sect. 3.3). In Table 1 we ...
... their main-sequence lifetime, thus significantly improving their age estimate from model isochrone fitting in comparison with lower mass stars. A good age estimate is important to constrain the average value of Q by modelling the tidal evolution of a particular system (cf. Sect. 3.3). In Table 1 we ...
A terrestrial planet candidate in a temperate orbit around Proxima
... been reported for other M-dwarf stars.18 The time-series of indices based on chromospheric emission lines (e.g. Hα ) do not show evidence of periodic variability, even after removing data points likely affected by flares. We also investigated possible correlations of the Doppler measurements with a ...
... been reported for other M-dwarf stars.18 The time-series of indices based on chromospheric emission lines (e.g. Hα ) do not show evidence of periodic variability, even after removing data points likely affected by flares. We also investigated possible correlations of the Doppler measurements with a ...
Other Planetary Systems
... Now let’s add in the effects of Saturn, which exerts the second greatest gravitational tug on the Sun. Saturn takes 29.5 years to orbit the Sun, so by itself it would cause the Sun to orbit their mutual center of mass every 29.5 years. However, because Saturn’s influence is secondary to that of Jupi ...
... Now let’s add in the effects of Saturn, which exerts the second greatest gravitational tug on the Sun. Saturn takes 29.5 years to orbit the Sun, so by itself it would cause the Sun to orbit their mutual center of mass every 29.5 years. However, because Saturn’s influence is secondary to that of Jupi ...
A Detailed Derivation of the Radial Velocity Equation
... situation of a planet orbiting a star (often referred to as the “parent star” or, the term that will be used throughout this paper, the “host star”) and then start applying basic principles of physics and utilize mathematical tools in order to analyze and describe the star‐planet s ...
... situation of a planet orbiting a star (often referred to as the “parent star” or, the term that will be used throughout this paper, the “host star”) and then start applying basic principles of physics and utilize mathematical tools in order to analyze and describe the star‐planet s ...
Dynamics of small bodies in planetary systems
... can be estimated as long as the level of dust emission has been measured at two or more wavelengths from which its temperature can be estimated. However, such estimates suffer large uncertainties, since the exact temperature of the dust depends on its size and composition (see chapter by Li). Assumi ...
... can be estimated as long as the level of dust emission has been measured at two or more wavelengths from which its temperature can be estimated. However, such estimates suffer large uncertainties, since the exact temperature of the dust depends on its size and composition (see chapter by Li). Assumi ...
The Habitability of Planets Orbiting M
... and decades-long process of anchoring spectral type in physical properties like mass and radius is described in more detail in Section 2.4. 2.2. M dwarf evolution and lifetimes M dwarfs have rightfully been called “models of persistence" (Laughlin et al., 1997). A scaling argument demonstrates why t ...
... and decades-long process of anchoring spectral type in physical properties like mass and radius is described in more detail in Section 2.4. 2.2. M dwarf evolution and lifetimes M dwarfs have rightfully been called “models of persistence" (Laughlin et al., 1997). A scaling argument demonstrates why t ...
Gliese 581
Gliese 581 (/ˈɡliːzə/) is a star of spectral type M3V (a red dwarf) about 20 light years away from Earth in the constellation Libra. Its estimated mass is about a third of that of the Sun, and it is the 89th closest known star to the Sun. Observations suggest that the star has a planetary system consisting of three known planets, designated Gliese 581 b, c, and e and a possibly confirmed planet, d, in order of discovery. Additional outer planets, which received the designations Gliese 581 f, and g have been proposed, but the evidence that led to the discovery claims has been shown to be the result of stellar activity mimicking the radial velocity variations due to orbiting planets.Gliese 581 has been the subject of a ""huge amount of attention"" in the quest to discover the first habitable extrasolar planet; first for c, and then d and g. Gliese 581 c, the first low-mass extrasolar planet found near a habitable zone, was discovered in April 2007. It has since been shown that under known terrestrial planet climate models, Gliese 581 c is likely to have a runaway greenhouse effect, and hence is probably too hot to be habitable, analogous to Venus. The proposed planets Gliese 581 d and Gliese 581 g also received attention as being located within the habitable zone, but their existence has subsequently been put into doubt by some authors.On 27 November 2012, the European Space Agency announced a debris disk, with at least ten times as many comets as the Solar System. This put constraints on possible planets beyond 0.75 AU.