Analysis of Angular Momentum in Planetary Systems and Host Stars
... primary power law of stellar mass, J ∝ M α , excluding stars of <2 solar masses. Lower mass stars rotate more slowly with and have smaller moments of inertia, and as a result they contain much less spin angular momentum. A secondary power law describes the upper bound of angular momenta of these les ...
... primary power law of stellar mass, J ∝ M α , excluding stars of <2 solar masses. Lower mass stars rotate more slowly with and have smaller moments of inertia, and as a result they contain much less spin angular momentum. A secondary power law describes the upper bound of angular momenta of these les ...
Pebble Accretion and the Diversity of Planetary Systems
... the pebble radius. Unless otherwise noted, new planetesimals are assumed to have diameters between 30 and 300 km, with total mass uniformly spaced in log mass. We neglect the ...
... the pebble radius. Unless otherwise noted, new planetesimals are assumed to have diameters between 30 and 300 km, with total mass uniformly spaced in log mass. We neglect the ...
swisseph - Astrodienst
... In search of correct algorithms ...................................................................................................................... 38 More benefits from our new sidereal algorithms: standard equinoxes and precession-corrected transits ..... 41 ...
... In search of correct algorithms ...................................................................................................................... 38 More benefits from our new sidereal algorithms: standard equinoxes and precession-corrected transits ..... 41 ...
Hint of a transiting extended atmosphere on 55 Cancri b⋆
... (2011). We used SAS version 12.0 and extracted source counts from the EPIC-pn camera using a circular region of radius 19.00 2. The background was estimated from a large adjacent region on the same CCD selected to be free from other sources. The count rate was found to be 0.0187 ± 0.0015 s−1 . ...
... (2011). We used SAS version 12.0 and extracted source counts from the EPIC-pn camera using a circular region of radius 19.00 2. The background was estimated from a large adjacent region on the same CCD selected to be free from other sources. The count rate was found to be 0.0187 ± 0.0015 s−1 . ...
hwd_ewd_v3 - X-ray and Observational Astronomy Group
... temperatures, below ~10,000K, even if present, the signatures of H and He become difficult and eventually impossible to detect. The physics of the atmospheres of these cooler objects is quite different, and understanding their compositions and physical structure is even more complex than for their h ...
... temperatures, below ~10,000K, even if present, the signatures of H and He become difficult and eventually impossible to detect. The physics of the atmospheres of these cooler objects is quite different, and understanding their compositions and physical structure is even more complex than for their h ...
ASTR 105G Lab Manual Astronomy Department
... school. Astronomers frequently use graphs to plot data. You have probably seen all sorts of graphs, such as the plot of the performance of the stock market shown in Fig. 1.2. A plot like this shows the history of the stock market versus time. The “x” (horizontal) axis represents time, and the “y” (v ...
... school. Astronomers frequently use graphs to plot data. You have probably seen all sorts of graphs, such as the plot of the performance of the stock market shown in Fig. 1.2. A plot like this shows the history of the stock market versus time. The “x” (horizontal) axis represents time, and the “y” (v ...
PDF of the Lab Manual for Astro 105 - NMSU Astronomy
... school. Astronomers frequently use graphs to plot data. You have probably seen all sorts of graphs, such as the plot of the performance of the stock market shown in Fig. 1.2. A plot like this shows the history of the stock market versus time. The “x” (horizontal) axis represents time, and the “y” (v ...
... school. Astronomers frequently use graphs to plot data. You have probably seen all sorts of graphs, such as the plot of the performance of the stock market shown in Fig. 1.2. A plot like this shows the history of the stock market versus time. The “x” (horizontal) axis represents time, and the “y” (v ...
Launch - Pluto - JHUAPL - The Johns Hopkins University Applied
... • Pluto is unusually hard to study from Earth because it is so small and far away. It is 50,000 times fainter than Mars, with less than 1% of the red planet’s apparent diameter when viewed from Earth. • One of the largest and brightest members of the Kuiper Belt, the vast region of ancient, icy, roc ...
... • Pluto is unusually hard to study from Earth because it is so small and far away. It is 50,000 times fainter than Mars, with less than 1% of the red planet’s apparent diameter when viewed from Earth. • One of the largest and brightest members of the Kuiper Belt, the vast region of ancient, icy, roc ...
New Extreme Trans-Neptunian Objects: Towards a Super
... The main parameters identified by TS2014 for the distant outer planet were a mass between 2 and 15 Earth masses with a distance beyond 200 AU, with a highly inclined 1500 AU orbit being possible. TS2014 suggested that a more comprehensive, wider orbital parameter analysis would put tighter constrain ...
... The main parameters identified by TS2014 for the distant outer planet were a mass between 2 and 15 Earth masses with a distance beyond 200 AU, with a highly inclined 1500 AU orbit being possible. TS2014 suggested that a more comprehensive, wider orbital parameter analysis would put tighter constrain ...
the evolution of planetary systems with time
... Solar systems orbiting other stars display a diverse set of architectures and motivate further studies concerning the dynamics of planetary systems. Part of the richness of this dynamical problem arises from the intrinsic complexity of N-body systems, even in the absence of additional forces (Murray ...
... Solar systems orbiting other stars display a diverse set of architectures and motivate further studies concerning the dynamics of planetary systems. Part of the richness of this dynamical problem arises from the intrinsic complexity of N-body systems, even in the absence of additional forces (Murray ...
Abiotic formation of O2 and O3 in high
... eliminate reaction with reduced volcanic gases (primarily H2 ) as an oxygen sink. The martian atmosphere contains 0.1% O2 and would likely have even more if the planet were slightly larger so that it did not lose oxygen to space by nonthermal loss mechanisms (McElroy and Donahue ...
... eliminate reaction with reduced volcanic gases (primarily H2 ) as an oxygen sink. The martian atmosphere contains 0.1% O2 and would likely have even more if the planet were slightly larger so that it did not lose oxygen to space by nonthermal loss mechanisms (McElroy and Donahue ...
Prospects for Viewing Comet ISON
... mornings and spring evenings. I didn't know which I had when viewing from home, but at Ron's there was a definite differentiation between the glow of Traverse City and the zodiacal light. That aside, Comet ISON has been under performing in the brightness department. For the first 5 months of this ye ...
... mornings and spring evenings. I didn't know which I had when viewing from home, but at Ron's there was a definite differentiation between the glow of Traverse City and the zodiacal light. That aside, Comet ISON has been under performing in the brightness department. For the first 5 months of this ye ...
Digital STARLAB Teachers Guide
... planetarium projector designed to produce the highest quality starfield images of any projection system in its price range for portable and small fixed domes. The projector features a custom fisheye lens (patent pending) capable of depicting an accurate, high-contrast, simulated night sky with the capa ...
... planetarium projector designed to produce the highest quality starfield images of any projection system in its price range for portable and small fixed domes. The projector features a custom fisheye lens (patent pending) capable of depicting an accurate, high-contrast, simulated night sky with the capa ...
arXiv:1502.03605v2 [astro-ph.EP] 24 Apr 2015
... accuracies but also on the actual size and density of the exoplanet. We argue that precise observations of stellar elemental abundances are central in order to place constraints on planetary bulk composition and to reduce model degeneracy. We provide a general methodology of analyzing interior struc ...
... accuracies but also on the actual size and density of the exoplanet. We argue that precise observations of stellar elemental abundances are central in order to place constraints on planetary bulk composition and to reduce model degeneracy. We provide a general methodology of analyzing interior struc ...
The physics of white dwarfs
... self-attraction too great to be counterbalanced by the pressure of the degenerate electrons and are doomed to ultimate collapse. Supernovae are external manifestations of such catastrophes. In some cases, even the violence of a supernova explosion does not wholly disrupt the star, however, and a ste ...
... self-attraction too great to be counterbalanced by the pressure of the degenerate electrons and are doomed to ultimate collapse. Supernovae are external manifestations of such catastrophes. In some cases, even the violence of a supernova explosion does not wholly disrupt the star, however, and a ste ...
- TestbankU
... a. Bode’s Law still applies to the orbits of planets b. Bode’s Law still applies, but now we need to rethink our conceptions of what planets are c. Bode’s Law cannot apply, since there are no planets at 2.8 AU from the Sun d. Bode’s Law never applied in the first place Ans: b 27. In the 1840’s, some ...
... a. Bode’s Law still applies to the orbits of planets b. Bode’s Law still applies, but now we need to rethink our conceptions of what planets are c. Bode’s Law cannot apply, since there are no planets at 2.8 AU from the Sun d. Bode’s Law never applied in the first place Ans: b 27. In the 1840’s, some ...
Electronic version
... In the area of theoretical astronomy, an early interest in celestial mechanics has diversified into the fields of solar and stellar astrophysics, stellar and planetary evolution, and (recently) cosmology. Today, astronomical research in Japan encompasses nearly every branch of this science, and is w ...
... In the area of theoretical astronomy, an early interest in celestial mechanics has diversified into the fields of solar and stellar astrophysics, stellar and planetary evolution, and (recently) cosmology. Today, astronomical research in Japan encompasses nearly every branch of this science, and is w ...
Article PDF - IOPscience
... traveling at the same velocity. These larger meteoroids are still much smaller than the mean free path, so that aerodynamic effects seem unlikely to explain the difference; nevertheless, something must differ between the two classes of objects, or else the more massive Jodrell Bank meteoroids would ...
... traveling at the same velocity. These larger meteoroids are still much smaller than the mean free path, so that aerodynamic effects seem unlikely to explain the difference; nevertheless, something must differ between the two classes of objects, or else the more massive Jodrell Bank meteoroids would ...
The DBV stars: Progress and problems
... essentially unchanged. Other values, such as the seismological parallax also changed; the best parallax distance is now about 45 pc, and logg = 7.95. Provencal et al. (1995) find a slightly hotter temperature of 27,000 K. Depending on the carbon mass fraction in the core, I will probably be able to ...
... essentially unchanged. Other values, such as the seismological parallax also changed; the best parallax distance is now about 45 pc, and logg = 7.95. Provencal et al. (1995) find a slightly hotter temperature of 27,000 K. Depending on the carbon mass fraction in the core, I will probably be able to ...
3. What are the intrinsic and extrinsic environments of exoplanets?
... We will use the SNHC to clarify what is known about the Sun’s neighbors as potential hosts of habitable exoplanets. We will identify stars that lack critical observations and, where possible, acquire the appropriate data through supplementary observations. In particular, the PU coronagraphic optics ...
... We will use the SNHC to clarify what is known about the Sun’s neighbors as potential hosts of habitable exoplanets. We will identify stars that lack critical observations and, where possible, acquire the appropriate data through supplementary observations. In particular, the PU coronagraphic optics ...
Definition of planet
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies. Greek astronomers employed the term asteres planetai (ἀστέρες πλανῆται), ""wandering stars"", for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different objects, from the Sun and the Moon to satellites and asteroids.By the end of the 19th century the word planet, though it had yet to be defined, had become a working term applied only to a small set of objects in the Solar System. After 1992, however, astronomers began to discover many additional objects beyond the orbit of Neptune, as well as hundreds of objects orbiting other stars. These discoveries not only increased the number of potential planets, but also expanded their variety and peculiarity. Some were nearly large enough to be stars, while others were smaller than Earth's moon. These discoveries challenged long-perceived notions of what a planet could be.The issue of a clear definition for planet came to a head in 2005 with the discovery of the trans-Neptunian object Eris, a body more massive than the smallest then-accepted planet, Pluto. In its 2006 response, the International Astronomical Union (IAU), recognised by astronomers as the world body responsible for resolving issues of nomenclature, released its decision on the matter. This definition, which applies only to the Solar System, states that a planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has ""cleared its neighbourhood"" of smaller objects around its orbit. Under this new definition, Pluto and the other trans-Neptunian objects do not qualify as planets. The IAU's decision has not resolved all controversies, and while many scientists have accepted the definition, some in the astronomical community have rejected it outright.