Astrometry of Asteroids
... astronomers for a particular The Equatorial Coordinates purpose. One of the most important catalogs is called the FK5 Catalog, because it is one of the fundamental catalogs used as a reference for measuring the positions to other stars in the sky (see the next section of this manual). The FK5 Catalo ...
... astronomers for a particular The Equatorial Coordinates purpose. One of the most important catalogs is called the FK5 Catalog, because it is one of the fundamental catalogs used as a reference for measuring the positions to other stars in the sky (see the next section of this manual). The FK5 Catalo ...
Astrometry of Asteroids
... astronomers for a particular The Equatorial Coordinates purpose. One of the most important catalogs is called the FK5 Catalog, because it is one of the fundamental catalogs used as a reference for measuring the positions to other stars in the sky (see the next section of this manual). The FK5 Catalo ...
... astronomers for a particular The Equatorial Coordinates purpose. One of the most important catalogs is called the FK5 Catalog, because it is one of the fundamental catalogs used as a reference for measuring the positions to other stars in the sky (see the next section of this manual). The FK5 Catalo ...
Cosmology
... Wrong : Because receding galaxies are moving through space and exhibit a Doppler shift. (Doppler effect) ...
... Wrong : Because receding galaxies are moving through space and exhibit a Doppler shift. (Doppler effect) ...
A Zoo of Galaxies
... A galaxy is a massive collection of stars, gas and interstellar dust. To first order, the optical colour of a galaxy tells about the types of stars which live in the galaxy (ignoring the complications of dust which can redden some types of galaxies quite significantly e.g. Masters et al. 2003, 2010a ...
... A galaxy is a massive collection of stars, gas and interstellar dust. To first order, the optical colour of a galaxy tells about the types of stars which live in the galaxy (ignoring the complications of dust which can redden some types of galaxies quite significantly e.g. Masters et al. 2003, 2010a ...
Astronomical Picture of the Day
... galaxies Abell 1185. There at least two galaxies, cataloged as Arp 105 and dubbed The Guitar for their familiar appearance, are pulling each other apart gravitationally. Most of Abell 1185's hundreds of galaxies are elliptical galaxies, although spiral, lenticular, and irregular galaxies are all cle ...
... galaxies Abell 1185. There at least two galaxies, cataloged as Arp 105 and dubbed The Guitar for their familiar appearance, are pulling each other apart gravitationally. Most of Abell 1185's hundreds of galaxies are elliptical galaxies, although spiral, lenticular, and irregular galaxies are all cle ...
A Comet-Hunter`s Legacy -
... causing the fuzzy blurring near its center, and emitting huge amounts of radiation, all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer together. At first, this will probably produce more and more extreme waves of star for ...
... causing the fuzzy blurring near its center, and emitting huge amounts of radiation, all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer together. At first, this will probably produce more and more extreme waves of star for ...
Today in Astronomy 102: black hole observations, v.4
... Matter falling into AGN black holes: large accretion disks The disk-shaped collection of matter surrounding the black hole in an AGN arises rather naturally from the influence of the black hole on stars and other material in the galactic center. Stars in a galaxy perpetually interact with each ot ...
... Matter falling into AGN black holes: large accretion disks The disk-shaped collection of matter surrounding the black hole in an AGN arises rather naturally from the influence of the black hole on stars and other material in the galactic center. Stars in a galaxy perpetually interact with each ot ...
ongoing massive star formation in the bulge of m511 hjglm lamers,2
... e.g., Millard et al. 1999). The galaxy was observed through the broadband Ðlters F255W and F336W in 1994 and through the broadband Ðlters F439W, F555W, F675W, and F814W in 1995. We will refer to these Ðlters as the UV, U, B, V , R, and I Ðlters. The observations in the UV, U, and B Ðlters were split ...
... e.g., Millard et al. 1999). The galaxy was observed through the broadband Ðlters F255W and F336W in 1994 and through the broadband Ðlters F439W, F555W, F675W, and F814W in 1995. We will refer to these Ðlters as the UV, U, B, V , R, and I Ðlters. The observations in the UV, U, and B Ðlters were split ...
Astrometry of Asteroids
... astronomers for a particular The Equatorial Coordinates purpose. One of the most important catalogs is called the FK5 Catalog, because it is one of the fundamental catalogs used as a reference for measuring the positions to other stars in the sky (see the next section of this manual). The FK5 Catalo ...
... astronomers for a particular The Equatorial Coordinates purpose. One of the most important catalogs is called the FK5 Catalog, because it is one of the fundamental catalogs used as a reference for measuring the positions to other stars in the sky (see the next section of this manual). The FK5 Catalo ...
Less than 15 percent of star formation in massive galaxies is
... Bell et al.05, Wolf et al. 05) ...
... Bell et al.05, Wolf et al. 05) ...
Theoretical and observational framework Spectroscopic approach
... • Fast HB rotation, although maybe not present in all clusters, is a fairly common feature. ...
... • Fast HB rotation, although maybe not present in all clusters, is a fairly common feature. ...
Age dating stellar populations in the near infrared
... The Brott models show a slow increase in the time to the appearance of an RSG which evolves with a decreasing mass of the initial RSGs. This effect is due to an increasing size in the hydrogen burning core of fast rotating stars. At high rotational velocities, stars evolve as if they were more massi ...
... The Brott models show a slow increase in the time to the appearance of an RSG which evolves with a decreasing mass of the initial RSGs. This effect is due to an increasing size in the hydrogen burning core of fast rotating stars. At high rotational velocities, stars evolve as if they were more massi ...
Andromeda *ruler of men*
... Andromeda is an autumn constellation that is V shaped the best time of year to view Andromeda is during the month of November with the suggested time being 9pm. It occupies 722 square degrees and is located close to the North Pole in the first quadrant of the Northern Hemisphere. Andromeda can be s ...
... Andromeda is an autumn constellation that is V shaped the best time of year to view Andromeda is during the month of November with the suggested time being 9pm. It occupies 722 square degrees and is located close to the North Pole in the first quadrant of the Northern Hemisphere. Andromeda can be s ...
26.5 The Expanding Universe
... To have a gravitational force strong enough to reverse the expansion, there must be sufficient mass in the universe. If there is less than this amount of mass, the universe will continue to expand. ...
... To have a gravitational force strong enough to reverse the expansion, there must be sufficient mass in the universe. If there is less than this amount of mass, the universe will continue to expand. ...
Star clusters in M 33 - IV. A new survey from deep HST images
... profiles were fit to the brightest cluster radial profiles, and core radii are estimated in the range from <0.2 parsecs to ∼2 parsecs, with the few old clusters having larger core radii on average than the young and intermediate populations (Paper II). By integrating the number density of clusters a ...
... profiles were fit to the brightest cluster radial profiles, and core radii are estimated in the range from <0.2 parsecs to ∼2 parsecs, with the few old clusters having larger core radii on average than the young and intermediate populations (Paper II). By integrating the number density of clusters a ...
Identifying Young far from Giant Stars Molecular Clouds
... It is speculated that classical T Tauri stars evolve into weak T Tauri stars, their accretion disks gradually dissipating over time (Walter et al. 1988). The two types of stars are similar in luminosities and effective temperature, implying a potential evolutionary relationship. The dust and gas wit ...
... It is speculated that classical T Tauri stars evolve into weak T Tauri stars, their accretion disks gradually dissipating over time (Walter et al. 1988). The two types of stars are similar in luminosities and effective temperature, implying a potential evolutionary relationship. The dust and gas wit ...
Final Paper Template for the 5th Southeast Asian Forum
... Milky Way galaxy composed by some elementary components, one of them are open clusters orbiting galactic center in the disc. Each cluster contain hundreds to thousands stars which born and evolve together. Along with member stars’ evolution, open cluster experiences a dynamical evolution under influ ...
... Milky Way galaxy composed by some elementary components, one of them are open clusters orbiting galactic center in the disc. Each cluster contain hundreds to thousands stars which born and evolve together. Along with member stars’ evolution, open cluster experiences a dynamical evolution under influ ...
Autumn 2016 Midterm Review - Autumn 2015 Questions
... 24. Which of the above listed stars is the hottest? — Thuban 25. Which of the above listed stars is the coolest? — Giausar 26. Which of the listed stars would have the most prominent absorption lines of hydrogen? — Thuban 27. Which of the listed stars is the closest? — Arrakis 28. Which of the list ...
... 24. Which of the above listed stars is the hottest? — Thuban 25. Which of the above listed stars is the coolest? — Giausar 26. Which of the listed stars would have the most prominent absorption lines of hydrogen? — Thuban 27. Which of the listed stars is the closest? — Arrakis 28. Which of the list ...
Chromospherically young, kinematically old stars
... Received 3 July 2001 / Accepted 18 December 2001 Abstract. We have investigated a group of stars known to have low chromospheric ages, but high kinematical ages. Isochrone, chemical and lithium ages are estimated for them. The majority of stars in this group show lithium abundances much smaller than ...
... Received 3 July 2001 / Accepted 18 December 2001 Abstract. We have investigated a group of stars known to have low chromospheric ages, but high kinematical ages. Isochrone, chemical and lithium ages are estimated for them. The majority of stars in this group show lithium abundances much smaller than ...
THE DISRUPTION OF STELLAR CLUSTERS CONTAINING
... is part of the collapsing core, we add its mass to a growing central point mass and remove it from the simulation. This central point mass is then used only during the calculation of the cluster gravitational potential. We determine whether a star is part of the collapsing core by monitoring its orb ...
... is part of the collapsing core, we add its mass to a growing central point mass and remove it from the simulation. This central point mass is then used only during the calculation of the cluster gravitational potential. We determine whether a star is part of the collapsing core by monitoring its orb ...
The chemical case for no winds in dwarf irregular galaxies
... of cloud formation, μ , and cloud collision, H (see Mollá & Dı́az 2005, for further details). Thus, the number of free parameters is reduced to three: τ , μ and H . It is important to stress that the SFR is not an input of the model, but a result of the efficiencies selected and the amount ...
... of cloud formation, μ , and cloud collision, H (see Mollá & Dı́az 2005, for further details). Thus, the number of free parameters is reduced to three: τ , μ and H . It is important to stress that the SFR is not an input of the model, but a result of the efficiencies selected and the amount ...
ATLASGAL -- The APEX telescope large area survey of the galaxy at
... high-mass star formation is that the relevant timescales are short (McKee & Tan 2002), implying low number statistics in finding stars in a given evolutionary state. Moreover, high-mass stars are rare. This implies that regions in which they form are generally at large distances, which leads to the ...
... high-mass star formation is that the relevant timescales are short (McKee & Tan 2002), implying low number statistics in finding stars in a given evolutionary state. Moreover, high-mass stars are rare. This implies that regions in which they form are generally at large distances, which leads to the ...
The life-cycle of star formation in distant clusters
... The life-cycle of star formation in distant clusters sequence to the remnant phase. One possible drawback is that the models assume solar metallicity, thereby neglecting chemical evolution effects; however, as we are primarily concerned with testing short-term changes to old wellestablished galaxies ...
... The life-cycle of star formation in distant clusters sequence to the remnant phase. One possible drawback is that the models assume solar metallicity, thereby neglecting chemical evolution effects; however, as we are primarily concerned with testing short-term changes to old wellestablished galaxies ...
Document
... Distance is the total distance travelled. It is a scalar quantity. Displacement is the length measured from the starting point of a journey to the finishing point in a straight line. Its direction must be stated because it is a vector quantity. The direction can be given as left or right, up or down ...
... Distance is the total distance travelled. It is a scalar quantity. Displacement is the length measured from the starting point of a journey to the finishing point in a straight line. Its direction must be stated because it is a vector quantity. The direction can be given as left or right, up or down ...
stochastic star formation and a (nearly) uniform stellar
... and minimal-2 formulations (Pflamm-Altenburg et al. 2007), with a Kroupa (2001) IMF and a CMF with β = 2, minimum mass of 20 M and maximum mass derived from the SFR averaged over 107 yr. In both the Kroupa fc = 1 and the IGIMF model, the IMF integrated over a galaxy is modulated by the galaxy star ...
... and minimal-2 formulations (Pflamm-Altenburg et al. 2007), with a Kroupa (2001) IMF and a CMF with β = 2, minimum mass of 20 M and maximum mass derived from the SFR averaged over 107 yr. In both the Kroupa fc = 1 and the IGIMF model, the IMF integrated over a galaxy is modulated by the galaxy star ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.