Jul y 9- 11,
... coverage, and will discuss what we can learn from this investigation about how the LMXBs population and their host galaxies evolve. ...
... coverage, and will discuss what we can learn from this investigation about how the LMXBs population and their host galaxies evolve. ...
Spectropolarimetry of the massive post
... observed long term changes in the polarimetry can be associated with an axi -symmetric structure, along the short axis of the extended reflection nebulosity. Long term pho tometry reveals that the star increased in temperature until the mid -nineties, after which the photospheric flux in the optical ...
... observed long term changes in the polarimetry can be associated with an axi -symmetric structure, along the short axis of the extended reflection nebulosity. Long term pho tometry reveals that the star increased in temperature until the mid -nineties, after which the photospheric flux in the optical ...
thick disk - asteroSTEP
... highest density peak of the final system. They are not necessarily the most metal-poor stars in the Galaxy. Now they lie in the central bulge region of the Galaxy. Accurate asteroseismology ages for metal-poor stars in the inner Galaxy would provide a great way to tell if they are the oldest stars o ...
... highest density peak of the final system. They are not necessarily the most metal-poor stars in the Galaxy. Now they lie in the central bulge region of the Galaxy. Accurate asteroseismology ages for metal-poor stars in the inner Galaxy would provide a great way to tell if they are the oldest stars o ...
Galaxies - hwchemistry
... two regions of the sky chosen for study are unusual. – So, it seems likely that the entire sky is carpeted with galaxies. ...
... two regions of the sky chosen for study are unusual. – So, it seems likely that the entire sky is carpeted with galaxies. ...
Galactic Stellar and Substellar Initial Mass Function Invited Review Gilles Chabrier
... ABSTRACT. We review recent determinations of the present-day mass function (PDMF) and initial mass function (IMF) in various components of the Galaxy—disk, spheroid, young, and globular clusters—and in conditions characteristic of early star formation. As a general feature, the IMF is found to depen ...
... ABSTRACT. We review recent determinations of the present-day mass function (PDMF) and initial mass function (IMF) in various components of the Galaxy—disk, spheroid, young, and globular clusters—and in conditions characteristic of early star formation. As a general feature, the IMF is found to depen ...
TOSS-UP 7) ASTRONOMY Short Answer
... Ancient cultures saw patterns in the heavens that resembled people, animals or common objects — constellations that came to represent figures from myth, such as Orion the Hunter, a hero in Greek mythology. Astronomers now often use constellations in the naming of stars. The International Astronomica ...
... Ancient cultures saw patterns in the heavens that resembled people, animals or common objects — constellations that came to represent figures from myth, such as Orion the Hunter, a hero in Greek mythology. Astronomers now often use constellations in the naming of stars. The International Astronomica ...
Using the Heavens to Know Time to Using Time to Know the Heavens
... when they should carry out certain activities. He provides nine observations of the risings or settings of five stars or star groups as well as the winter and summer solstices. In most cases, he told the farmers what they should do on the occasion when the stars rose, set or culminated in the mid-sk ...
... when they should carry out certain activities. He provides nine observations of the risings or settings of five stars or star groups as well as the winter and summer solstices. In most cases, he told the farmers what they should do on the occasion when the stars rose, set or culminated in the mid-sk ...
The most metal-poor galaxies
... 1978). It is also during the 70s that the first hierarchical models of galaxy formation were constructed (Press and Schechter 1974). Because dwarf galaxies condense from smaller perturbations than giants, the Cold Dark Matter models (CDM) predict that low mass galaxies could still be forming at the ...
... 1978). It is also during the 70s that the first hierarchical models of galaxy formation were constructed (Press and Schechter 1974). Because dwarf galaxies condense from smaller perturbations than giants, the Cold Dark Matter models (CDM) predict that low mass galaxies could still be forming at the ...
Chapter J2
... Passage 1 Quasars are some of the most puzzling objects in the sky. If viewed through an optical telescope, a quasar appears as a small, dim star. Quasars are the most distant objects that have been observed from Earth. But many quasars are hundreds of times brighter than the brightest galaxy. Becau ...
... Passage 1 Quasars are some of the most puzzling objects in the sky. If viewed through an optical telescope, a quasar appears as a small, dim star. Quasars are the most distant objects that have been observed from Earth. But many quasars are hundreds of times brighter than the brightest galaxy. Becau ...
Barium and europium abundances in cool dwarf stars and
... membership in a particular stellar population of the Galaxy. All the halo and thick disk stars of our sample with [Fe/H] from −0.34 to −1.5 show high values of [Eu/Ba] with only small scatter that indicates r-process dominated nucleosynthesis at times of formation not only of the halo but also of th ...
... membership in a particular stellar population of the Galaxy. All the halo and thick disk stars of our sample with [Fe/H] from −0.34 to −1.5 show high values of [Eu/Ba] with only small scatter that indicates r-process dominated nucleosynthesis at times of formation not only of the halo but also of th ...
Star Formation in the Milky Way and Nearby Galaxies Further
... The term dense gas refers generally to gas above some threshold of surface density, as determined by extinction or dust-continuum emission, or of volume density, as indicated by emission from molecular lines that trace densities higher than does CO. Although not precisely defined, suggestions includ ...
... The term dense gas refers generally to gas above some threshold of surface density, as determined by extinction or dust-continuum emission, or of volume density, as indicated by emission from molecular lines that trace densities higher than does CO. Although not precisely defined, suggestions includ ...
Set 3 AStronomy questions
... X) the same surface temperatures Y) very similar chemical compositions Z) the same apparent magnitudes ANSWER: Y) VERY SIMILAR CHEMICAL COMPOSITIONS BONUS 7) ASTRONOMY Multiple Choice When binary stars are made of a main sequence star and a compact white dwarf, as long as the white dwarf’s mass rema ...
... X) the same surface temperatures Y) very similar chemical compositions Z) the same apparent magnitudes ANSWER: Y) VERY SIMILAR CHEMICAL COMPOSITIONS BONUS 7) ASTRONOMY Multiple Choice When binary stars are made of a main sequence star and a compact white dwarf, as long as the white dwarf’s mass rema ...
Elements of astronomy
... the horizon in the east, cross the meridian, and descend obliquely to the west. The whole celestial vault appears to be in motion round a certain axis, carrying with it all the objects visible upon it, without disturbing their relative positions. The point of the heavens which lies at the extremity ...
... the horizon in the east, cross the meridian, and descend obliquely to the west. The whole celestial vault appears to be in motion round a certain axis, carrying with it all the objects visible upon it, without disturbing their relative positions. The point of the heavens which lies at the extremity ...
Galaxies
... stars earlier and more rapidly than late-type galaxies. They are more strongly clustered. It is likely that mergers played an important role in their formation, contributing to their rapid star formation rates and their kinematically hot structure. It is also likely that some form of feedback or “st ...
... stars earlier and more rapidly than late-type galaxies. They are more strongly clustered. It is likely that mergers played an important role in their formation, contributing to their rapid star formation rates and their kinematically hot structure. It is also likely that some form of feedback or “st ...
Other Planetary Systems
... German astronomer Johann Bayer developed a system that gave names to many more stars: Each star gets a name based on its constellation and a Greek letter indicating its ranking in brightness within that constellation. For example, the brightest star in the constellation Andromeda is called Alpha And ...
... German astronomer Johann Bayer developed a system that gave names to many more stars: Each star gets a name based on its constellation and a Greek letter indicating its ranking in brightness within that constellation. For example, the brightest star in the constellation Andromeda is called Alpha And ...
Multiplicity in Early Stellar Evolution - Astronomy Group
... be represented by a binary graph; the figure describes all possible multiples up to an octuple system. The position of each subsystem is coded by levels indicated in the circles. The nomenclature follows the IAU recommendation. ...
... be represented by a binary graph; the figure describes all possible multiples up to an octuple system. The position of each subsystem is coded by levels indicated in the circles. The nomenclature follows the IAU recommendation. ...
Altair -- the ``hottest`` magnetically active star in X-rays
... of two weeks between both observations leads to large phase uncertainties. Additionally, some restructuring of X-ray emitting surface features might have occurred over times of several days. To investigate periodicity of the obtained X-ray light curves, that might be related to rotational modulation ...
... of two weeks between both observations leads to large phase uncertainties. Additionally, some restructuring of X-ray emitting surface features might have occurred over times of several days. To investigate periodicity of the obtained X-ray light curves, that might be related to rotational modulation ...
SPIRou Science Case
... SPIRou plans to concentrate on two main scientific goals. The first one is to search for & characterize habitable exo-Earths orbiting low-mass & very-low mass stars (LMSs & vLMSs) using high-precision radial velocity (RV) measurements. This search will expand the initial, exploratory studies carried ...
... SPIRou plans to concentrate on two main scientific goals. The first one is to search for & characterize habitable exo-Earths orbiting low-mass & very-low mass stars (LMSs & vLMSs) using high-precision radial velocity (RV) measurements. This search will expand the initial, exploratory studies carried ...
Evolution of Circumstellar Disks Around Normal Stars
... wave surveys for cold gas in remnant disks. One debris disk that showed evidence for gas in the early work of Zuckerman et al. (1995), the A star 49 Ceti, was recently confirmed to have CO emission by Dent and Coulson (2005). Transient absorption lines of atomic gas with abundances enhanced in refra ...
... wave surveys for cold gas in remnant disks. One debris disk that showed evidence for gas in the early work of Zuckerman et al. (1995), the A star 49 Ceti, was recently confirmed to have CO emission by Dent and Coulson (2005). Transient absorption lines of atomic gas with abundances enhanced in refra ...
Stellar Structure and Evolution
... the physical properties of the matter in the stars; hence by testing the computed models against observations we are effectively testing the physics that was used to compute the models, often under conditions where it is impossible to carry out tests in the laboratory. This chapter provides an intro ...
... the physical properties of the matter in the stars; hence by testing the computed models against observations we are effectively testing the physics that was used to compute the models, often under conditions where it is impossible to carry out tests in the laboratory. This chapter provides an intro ...
THE PERIOD OF ROTATION OF THE SUN
... instrument, and has three separately tunable receivers (400-1600 MHz) which record data digitally and can display the data as a chart record or as sound. VIREO simulates modern astronomical observation by accessing a number of databases, both on-line and in data files provided with the software. The ...
... instrument, and has three separately tunable receivers (400-1600 MHz) which record data digitally and can display the data as a chart record or as sound. VIREO simulates modern astronomical observation by accessing a number of databases, both on-line and in data files provided with the software. The ...
Vireo Manual - Gettysburg College
... instrument, and has three separately tunable receivers (400-1600 MHz) which record data digitally and can display the data as a chart record or as sound. VIREO simulates modern astronomical observation by accessing a number of databases, both on-line and in data files provided with the software. The ...
... instrument, and has three separately tunable receivers (400-1600 MHz) which record data digitally and can display the data as a chart record or as sound. VIREO simulates modern astronomical observation by accessing a number of databases, both on-line and in data files provided with the software. The ...
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.