Hot Horizontal Branch Stars in the Galactic Bulge. I
... whose membership is likely given their spatial concentration towards the cluster center (Kaluzny & Udalski 1992). Hot, metal-rich BHB stars also appear to be present in metal-rich extragalactic systems. As reviewed by O’Connell (1999), elliptical galaxies and early-type spiral bulges commonly show a ...
... whose membership is likely given their spatial concentration towards the cluster center (Kaluzny & Udalski 1992). Hot, metal-rich BHB stars also appear to be present in metal-rich extragalactic systems. As reviewed by O’Connell (1999), elliptical galaxies and early-type spiral bulges commonly show a ...
Document
... – An H-R diagram plots the stellar luminosity of stars versus surface temperature (or color or spectral type). • What is the significance of the main sequence? – Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. – A star's mass determines its position along t ...
... – An H-R diagram plots the stellar luminosity of stars versus surface temperature (or color or spectral type). • What is the significance of the main sequence? – Normal stars that fuse H to He in their cores fall on the main sequence of an H-R diagram. – A star's mass determines its position along t ...
The Spectra ot Novae
... of absorption systems in the early post-maximum stages. A secondary minimum in the very early decline may be accompanied by strong emergence of the diffuse enhanced spectrum which will weaken again as the star recovers. Farther down the decline, a fading of the star may be correlated with weakening ...
... of absorption systems in the early post-maximum stages. A secondary minimum in the very early decline may be accompanied by strong emergence of the diffuse enhanced spectrum which will weaken again as the star recovers. Farther down the decline, a fading of the star may be correlated with weakening ...
Beyond simple depletion: phase behaviour of colloid–star polymer
... Colloids, polymers and surfactants almost always occur in the form of mixtures, whether in nature or as industrial products. One of the main tasks of soft condensed matter physics is to give generic (i.e. chemical-details-independent) insight into the structure, dynamics, phase behaviour and non-equ ...
... Colloids, polymers and surfactants almost always occur in the form of mixtures, whether in nature or as industrial products. One of the main tasks of soft condensed matter physics is to give generic (i.e. chemical-details-independent) insight into the structure, dynamics, phase behaviour and non-equ ...
24.1 Hubble`s Galaxy Classification
... This pair of images shows the Coma cluster of galaxies. Almost every object visible is a galaxy. Coma Cluster (a) A collection of many galaxies, each consisting of hundreds of billions of stars. Called the Coma Cluster, this group of galaxies lies more than 100 million pc from Earth. (The blue spike ...
... This pair of images shows the Coma cluster of galaxies. Almost every object visible is a galaxy. Coma Cluster (a) A collection of many galaxies, each consisting of hundreds of billions of stars. Called the Coma Cluster, this group of galaxies lies more than 100 million pc from Earth. (The blue spike ...
Constraining tidal dissipation in F-type main
... ages of the systems, which implies that the synchronous final state has possibly already been reached. Other systems, e.g., HD15082/WASP-33, have a star so massive that a Qs too large to be measurable is expected, or show a remarkable misalignment between the stellar spin and the orbital angular mo ...
... ages of the systems, which implies that the synchronous final state has possibly already been reached. Other systems, e.g., HD15082/WASP-33, have a star so massive that a Qs too large to be measurable is expected, or show a remarkable misalignment between the stellar spin and the orbital angular mo ...
When we look at a neighboring galaxy (such as M31, the
... The Andromeda Galaxy, also known as M31, is a spiral galaxy physically larger, but less massive, than our Milky Way Galaxy. The Andromeda is the largest member of the Local Group, a cluster of about 30 galaxies that are gravitationally attracted to one another. At a distance of 2.5 million light-yea ...
... The Andromeda Galaxy, also known as M31, is a spiral galaxy physically larger, but less massive, than our Milky Way Galaxy. The Andromeda is the largest member of the Local Group, a cluster of about 30 galaxies that are gravitationally attracted to one another. At a distance of 2.5 million light-yea ...
CH12.AST1001.F16.EDS
... These two stars have about the same luminosity— which one appears brighter? A. Alpha Centauri B. The Sun ...
... These two stars have about the same luminosity— which one appears brighter? A. Alpha Centauri B. The Sun ...
here - NASA/IPAC Extragalactic Database
... the situation may be a little more complicated than that. These stars will have such high mass-loss rates that it is possible, even likely, that the 120M⊙ star will not be identified as an O3-4 V or B0 I, but rather as a hydrogen-rich, WN Wolf-Rayet star, similar to the highest mass (but unevolved) ...
... the situation may be a little more complicated than that. These stars will have such high mass-loss rates that it is possible, even likely, that the 120M⊙ star will not be identified as an O3-4 V or B0 I, but rather as a hydrogen-rich, WN Wolf-Rayet star, similar to the highest mass (but unevolved) ...
Classification of Variable Stars
... exhausted. (i.e. V746 Oph is the 746th variable to be discovered in Ophiuchus.) Variable star names are determined by a committee appointed by the International Astronomical Union (I.A.U.). The assignments are made in the order in which the variable stars were discovered in a constellation. If one o ...
... exhausted. (i.e. V746 Oph is the 746th variable to be discovered in Ophiuchus.) Variable star names are determined by a committee appointed by the International Astronomical Union (I.A.U.). The assignments are made in the order in which the variable stars were discovered in a constellation. If one o ...
Entropy
... Classification of stars is based on the so-called HR diagram. Usually, the HR diagram is plotted either in the coordinates of color index (B–V) versus absolute stellar magnitude MV or in the coordinates of effective temperature Teff versus luminosity L. Stars tend to fall only into certain regions o ...
... Classification of stars is based on the so-called HR diagram. Usually, the HR diagram is plotted either in the coordinates of color index (B–V) versus absolute stellar magnitude MV or in the coordinates of effective temperature Teff versus luminosity L. Stars tend to fall only into certain regions o ...
Protostellar/PMS Mass Infall Luminosity Problem
... However, this is still a rather poor indicator of age. ...
... However, this is still a rather poor indicator of age. ...
neutron star
... what would happen if a star orbiting in a direction opposite the neutron’s star rotation fell onto a neutron star? ...
... what would happen if a star orbiting in a direction opposite the neutron’s star rotation fell onto a neutron star? ...
Direct Detection of Galactic Halo Dark Matter
... we may also have excluded a few binary halo stars. Because we searched for stars having ⬎ 0.33⬙ year⫺1, there is a lack of stars with very low space motions. Furthermore, because of large differences in the epochs of the plates, an object with a proper motion ⬎3⬙ year⫺1 will have a displacement of ...
... we may also have excluded a few binary halo stars. Because we searched for stars having ⬎ 0.33⬙ year⫺1, there is a lack of stars with very low space motions. Furthermore, because of large differences in the epochs of the plates, an object with a proper motion ⬎3⬙ year⫺1 will have a displacement of ...
Word version of Episode 704
... Finding the Andromeda galaxy M31 The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It i ...
... Finding the Andromeda galaxy M31 The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It i ...
Neutron star masses: dwarfs, giants and neighbors
... • along the spin axis (see Kuranov et al. 2009 MNRAS 395, 2087) ...
... • along the spin axis (see Kuranov et al. 2009 MNRAS 395, 2087) ...
Entropy Production of Main-Sequence Stars
... the same distance from the Sun; (4) the HR diagram of clusters must be well approximated by theoretical isochrones plotted according to the model (the Padova database of evolutionary tracks and isochrones web-site: http://pleiadi.oapd.inaf.it/) [29,30] using the values of age and metallicity from th ...
... the same distance from the Sun; (4) the HR diagram of clusters must be well approximated by theoretical isochrones plotted according to the model (the Padova database of evolutionary tracks and isochrones web-site: http://pleiadi.oapd.inaf.it/) [29,30] using the values of age and metallicity from th ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.