analysis of eclipsing binary data - Astrophysics
... determination exercise, but the recommended epoch must be used for the preparation of light and radial velocity curves to be submitted for marking. It is suggested that a wide period range be selected initially, with a period increment chosen so that something like ten or twenty periods will be trie ...
... determination exercise, but the recommended epoch must be used for the preparation of light and radial velocity curves to be submitted for marking. It is suggested that a wide period range be selected initially, with a period increment chosen so that something like ten or twenty periods will be trie ...
Neutron Star and Superfluidity
... The idea of superfluidity exists inside neutron stars was first proposed by Migdal[1]. In analogy to electrons inside superconductor forming cooper pairs due to electron lattice interaction, it is expected that nucleons in neutron star at sufficiently high density and low temperature can also form coppe ...
... The idea of superfluidity exists inside neutron stars was first proposed by Migdal[1]. In analogy to electrons inside superconductor forming cooper pairs due to electron lattice interaction, it is expected that nucleons in neutron star at sufficiently high density and low temperature can also form coppe ...
The physics of star formation
... ‘dark clouds’ against the bright background of the Milky Way because their interstellar dust absorbs the starlight from the more distant stars. In some nearby dark clouds many faint young stars are seen, most distinctive among which are the T Tauri stars, whose variability, close association with th ...
... ‘dark clouds’ against the bright background of the Milky Way because their interstellar dust absorbs the starlight from the more distant stars. In some nearby dark clouds many faint young stars are seen, most distinctive among which are the T Tauri stars, whose variability, close association with th ...
The Milky Way disk
... absolute magnitude of different-colour (i.e. spectral type) stars were not known, and it was not possible to invert the equations for star counts to derive distances. It was during the second world war that a huge stepahead was done by W. Baade. He made use of the Mt. Wilson telescope during the Los ...
... absolute magnitude of different-colour (i.e. spectral type) stars were not known, and it was not possible to invert the equations for star counts to derive distances. It was during the second world war that a huge stepahead was done by W. Baade. He made use of the Mt. Wilson telescope during the Los ...
Internal structure of a cold dark molecular cloud inferred
... Stars and planets form within dark molecular clouds, but little is understood about the internal structure of these clouds, and consequently about the initial conditions that give rise to star and planet formation. The clouds are primarily composed of molecular hydrogen, which is virtually inaccessi ...
... Stars and planets form within dark molecular clouds, but little is understood about the internal structure of these clouds, and consequently about the initial conditions that give rise to star and planet formation. The clouds are primarily composed of molecular hydrogen, which is virtually inaccessi ...
Constraining tidal dissipation in F-type main
... 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 list the presently known transiting systems with a star having a ...
... 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 list the presently known transiting systems with a star having a ...
SciPoster_Jan2009
... 2008). Dust can also be formed from old, dying stars that used to be like our Sun. Dust found in molecular clouds is crucial to the star formation process because it allows the gas to cool down enough so that clumps of the cloud can condense into pre-stellar cores under the influence of selfgravity. ...
... 2008). Dust can also be formed from old, dying stars that used to be like our Sun. Dust found in molecular clouds is crucial to the star formation process because it allows the gas to cool down enough so that clumps of the cloud can condense into pre-stellar cores under the influence of selfgravity. ...
silicon and oxygen abundances in planet-host stars
... no such differences in their sample for alpha- and iron-peak elements. They observe no difference in the overall trends of [X/Fe] between planet hosts and their volume-limited sample of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indisti ...
... no such differences in their sample for alpha- and iron-peak elements. They observe no difference in the overall trends of [X/Fe] between planet hosts and their volume-limited sample of stars without any known planetary-mass companions. Based on their results, stars with planets appear to be indisti ...
LCM Analysis for PLATO 2.0
... The confrontation between the evolution of the O’Connell effect and the maxima separiation may produce three results: 1) no correlation (no spot activity at all), 2) horizontally flattened circle (starspot migration) and 3) vertical distribution. The last one is particularly interesting, since it im ...
... The confrontation between the evolution of the O’Connell effect and the maxima separiation may produce three results: 1) no correlation (no spot activity at all), 2) horizontally flattened circle (starspot migration) and 3) vertical distribution. The last one is particularly interesting, since it im ...
The Age Distribution of Potential Intelligent Life in the Milky Way
... by these supernovas. For this reason, we would expect more habitable planets to be predicted by a model using the Salpeter IMF compared with the Kroupa IMF, which is what Gowanlock et al. (2011) found. The flattening of the IMF at subsolar masses is supported by recent observational evidence (Kroupa ...
... by these supernovas. For this reason, we would expect more habitable planets to be predicted by a model using the Salpeter IMF compared with the Kroupa IMF, which is what Gowanlock et al. (2011) found. The flattening of the IMF at subsolar masses is supported by recent observational evidence (Kroupa ...
Sidereus Nuncius (Print Translation)
... I shall first mention briefly, and then I shall review the history of the observations made by me. About ten months ago a rumor came to our ears that a spyglass had been made by a certain Dutchman23 by means of which visible objects, although far removed from the eye of the observer, were distinctl ...
... I shall first mention briefly, and then I shall review the history of the observations made by me. About ten months ago a rumor came to our ears that a spyglass had been made by a certain Dutchman23 by means of which visible objects, although far removed from the eye of the observer, were distinctl ...
The Stellar Population Synthesis Technique Charlie Conroy Princeton
... – Intensity of UV radiation ...
... – Intensity of UV radiation ...
astronomy (astr)
... which takes up the "refuse" of old stars while providing fuel for young stars forming. Covers the processes regulating the galactic gas budget and the corresponding observational diagnostics. Topics: radiative transfer, line formation mechanisms, continuum radiation, gas dynamics, star formation. Re ...
... which takes up the "refuse" of old stars while providing fuel for young stars forming. Covers the processes regulating the galactic gas budget and the corresponding observational diagnostics. Topics: radiative transfer, line formation mechanisms, continuum radiation, gas dynamics, star formation. Re ...
Unit 1 test review and answer key 16
... ____ 29. There are four basic shapes of galaxies: spiral, elliptical, regular, and irregular. ____ 30. A spiral galaxy looks like a pinwheel from above. ____ 31. Elliptical galaxies contain some of the oldest stars in the universe. ____ 32. Stars are formed within a nebula from the dust and gases fo ...
... ____ 29. There are four basic shapes of galaxies: spiral, elliptical, regular, and irregular. ____ 30. A spiral galaxy looks like a pinwheel from above. ____ 31. Elliptical galaxies contain some of the oldest stars in the universe. ____ 32. Stars are formed within a nebula from the dust and gases fo ...
The science case for - Astrophysics
... cold dark matter scenario. Snapshots are shown at various times from the early Universe (z=50) to the present day (z=0). Primary science cases for a 50metre-100metre Extremely Large Telescope Are there terrestrial planets orbiting other stars? Are we alone? Direct detection of earth-like planets in ...
... cold dark matter scenario. Snapshots are shown at various times from the early Universe (z=50) to the present day (z=0). Primary science cases for a 50metre-100metre Extremely Large Telescope Are there terrestrial planets orbiting other stars? Are we alone? Direct detection of earth-like planets in ...
Distance determination for RAVE stars using stellar models
... be done without a reliable estimate of the distances to the stars under consideration. Therefore obtaining accurate distances and velocities for a representative sample of stars in our Galaxy will be essential if we are to understand both the structure of our own Galaxy and galaxy formation in gener ...
... be done without a reliable estimate of the distances to the stars under consideration. Therefore obtaining accurate distances and velocities for a representative sample of stars in our Galaxy will be essential if we are to understand both the structure of our own Galaxy and galaxy formation in gener ...
Chapter 15 Normal and Active Galaxies
... Hubble’s Galaxy Classification Type Sa has the largest central bulge, Type Sb is smaller, and Type Sc is the smallest. Type Sa tends to have the most tightly bound spiral arms, with Types Sb and Sc progressively less tight, although the ...
... Hubble’s Galaxy Classification Type Sa has the largest central bulge, Type Sb is smaller, and Type Sc is the smallest. Type Sa tends to have the most tightly bound spiral arms, with Types Sb and Sc progressively less tight, although the ...
Article PDF - IOPscience
... Neptune and other hypothetical massive planetary embryos or of its temporary capture in a resonance with one of the other planets, although these scenarios have never been quantitatively simulated. In this section we investigate the effects that an eccentric Neptune would have on the formation of th ...
... Neptune and other hypothetical massive planetary embryos or of its temporary capture in a resonance with one of the other planets, although these scenarios have never been quantitatively simulated. In this section we investigate the effects that an eccentric Neptune would have on the formation of th ...
Observational studies of stellar rotation
... estimate of the Sun’s rotational period by observing the sunspots being carried across the stellar disk by the star’s rotation (Casas et al. 2006). When the stellar surface is not resolved, starspots still modulate the star’s luminosity in a periodic way. Hence, the recording of the photometric ligh ...
... estimate of the Sun’s rotational period by observing the sunspots being carried across the stellar disk by the star’s rotation (Casas et al. 2006). When the stellar surface is not resolved, starspots still modulate the star’s luminosity in a periodic way. Hence, the recording of the photometric ligh ...
Cosmic View The Universe in 40 Jumps
... We all, children and grownups alike, are inclined to live in our own little world, in our immediate surroundings, or at any rate with our attention concentrated on those things with which we are directly in touch. We tend to forget how vast are the ranges of existing reality which our eyes cannot di ...
... We all, children and grownups alike, are inclined to live in our own little world, in our immediate surroundings, or at any rate with our attention concentrated on those things with which we are directly in touch. We tend to forget how vast are the ranges of existing reality which our eyes cannot di ...
Thinking Outside the Sphere
... a model of the geocentric system, with the starry vault above. Although the two astronomers were separated by a dozen centuries, the view of the cosmos had changed but little. ...
... a model of the geocentric system, with the starry vault above. Although the two astronomers were separated by a dozen centuries, the view of the cosmos had changed but little. ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.