The XMM-Newton Bright Serendipitous Survey
... As discussed above, the optical counterparts found for the XBS sources have R magnitudes brighter than 22.5 (except for one object) with a large fraction (88%) of them having magnitudes brighter than 20.5 (i.e. they are visible on the DSS plates). Given the density of AGN at the magnitude limit of R ...
... As discussed above, the optical counterparts found for the XBS sources have R magnitudes brighter than 22.5 (except for one object) with a large fraction (88%) of them having magnitudes brighter than 20.5 (i.e. they are visible on the DSS plates). Given the density of AGN at the magnitude limit of R ...
11115002
... Regardless of the changing shape, the jet as a whole can be seen to be of a welldefined shape that is called the envelope, though initially is narrow and only pointing towards the pulsar’s proper motion, gradually bends the opposite way at greater distances from the pulsar. The brighter inner jet do ...
... Regardless of the changing shape, the jet as a whole can be seen to be of a welldefined shape that is called the envelope, though initially is narrow and only pointing towards the pulsar’s proper motion, gradually bends the opposite way at greater distances from the pulsar. The brighter inner jet do ...
CoRoT III programme
... channel and twice the photon noise in the exoplanet channel over periods up to 150 days, with a duty cycle higher than 90%. It still fulfils the scientific specifications and there is no sign of significant aging. CoRoT has made many “premières” in both planet detection and stellar microvariability. ...
... channel and twice the photon noise in the exoplanet channel over periods up to 150 days, with a duty cycle higher than 90%. It still fulfils the scientific specifications and there is no sign of significant aging. CoRoT has made many “premières” in both planet detection and stellar microvariability. ...
IOTA Observer`s Manual
... discoverer of Uranus, William Herschel, as he noticed faint stars dim as the planet passed close by. Occultation observations are fun to observe. There is perhaps nothing more exciting than watching a star vanish and return from behind a lunar mountain, or to see the star disappear for several secon ...
... discoverer of Uranus, William Herschel, as he noticed faint stars dim as the planet passed close by. Occultation observations are fun to observe. There is perhaps nothing more exciting than watching a star vanish and return from behind a lunar mountain, or to see the star disappear for several secon ...
the fixed stars
... arbitrators, but exposes to cruel and severe trials. By the Kabalists this constellation is associated with the Hebrew letter Shin and the 22nd Tarot Trump, The Fool". (Robson). Rising: Cepheus will not engender dispositions inclined to sport. He fashions faces marked by a stern demeanour, and mould ...
... arbitrators, but exposes to cruel and severe trials. By the Kabalists this constellation is associated with the Hebrew letter Shin and the 22nd Tarot Trump, The Fool". (Robson). Rising: Cepheus will not engender dispositions inclined to sport. He fashions faces marked by a stern demeanour, and mould ...
Particle Physics from Stars
... 25]. MS (main sequence): core hydrogen burning. BS (blue stragglers). TO (main-sequence turnoff): central hydrogen is exhausted. SGB (subgiant branch): hydrogen burning in a thick shell. RGB (red-giant branch): hydrogen burning in a thin shell with a growing core until helium ignites. HB (horizontal ...
... 25]. MS (main sequence): core hydrogen burning. BS (blue stragglers). TO (main-sequence turnoff): central hydrogen is exhausted. SGB (subgiant branch): hydrogen burning in a thick shell. RGB (red-giant branch): hydrogen burning in a thin shell with a growing core until helium ignites. HB (horizontal ...
here
... minutes to 24.8 arc minutes but increases in illumination from 27% to 48% during the course of the month. As the sun rises in late May, Venus will reach an altitude of about 23 degrees for observers at 40 degrees north. The brightest planet is at the descending node on May 9th. On May 22nd, Venus li ...
... minutes to 24.8 arc minutes but increases in illumination from 27% to 48% during the course of the month. As the sun rises in late May, Venus will reach an altitude of about 23 degrees for observers at 40 degrees north. The brightest planet is at the descending node on May 9th. On May 22nd, Venus li ...
Europium, Samarium, and Neodymium Isotopic Fractions in Metal
... exhibits radial velocity variations (Lucatello et al. 2005), indicating that it is a member of a binary or multiple star system. These characteristics have led to the classification of HD 196944 as a carbon-enhanced metal-poor senriched (CEMP-s) star, as defined in Beers & Christlieb (2005). Gallino ...
... exhibits radial velocity variations (Lucatello et al. 2005), indicating that it is a member of a binary or multiple star system. These characteristics have led to the classification of HD 196944 as a carbon-enhanced metal-poor senriched (CEMP-s) star, as defined in Beers & Christlieb (2005). Gallino ...
Mid-infrared Properties of Seyfert Galaxies: the IRAS 12um Sample
... In addition to a ~3500 K stellar blackbody and PAH component, we find that we need ~3 additional continuum dust components with T~400, ~150, and ~30 K to accurately fit the entire sample. An AGN manifests its presence with the requirement of an additional hot dust component T~800K (Laurent et al. 20 ...
... In addition to a ~3500 K stellar blackbody and PAH component, we find that we need ~3 additional continuum dust components with T~400, ~150, and ~30 K to accurately fit the entire sample. An AGN manifests its presence with the requirement of an additional hot dust component T~800K (Laurent et al. 20 ...
Deformations of Accreting Neutron Star Crusts and Gravitational
... by Papaloizou & Pringle (1978) and Wagoner (1984). The angular momentum loss rate from quadrupolar GW emission scales as νs5 , so that gravitational radiation effectively provides a “wall” beyond which accretion can no longer spin the star up. Bildsten (1998a) estimated that “wavy” electron capture ...
... by Papaloizou & Pringle (1978) and Wagoner (1984). The angular momentum loss rate from quadrupolar GW emission scales as νs5 , so that gravitational radiation effectively provides a “wall” beyond which accretion can no longer spin the star up. Bildsten (1998a) estimated that “wavy” electron capture ...
W.M. Keck Observatory Annual Report 2009
... II telescope to measure the spectrum of light emitted by each object to determine their composition and distance. The Keck spectra showed that the light from the supernovae traveled nearly 11 billion light years to reach Earth. Prior to this discovery, the astronomical literature showed that the mos ...
... II telescope to measure the spectrum of light emitted by each object to determine their composition and distance. The Keck spectra showed that the light from the supernovae traveled nearly 11 billion light years to reach Earth. Prior to this discovery, the astronomical literature showed that the mos ...
Infrared Astronomy
... yeux. In English: 'And now here is my secret, a very simple secret: It is only with the heart that one can see rightly; what is essential is invisible to the eye' (translation by Katherine Woods ...
... yeux. In English: 'And now here is my secret, a very simple secret: It is only with the heart that one can see rightly; what is essential is invisible to the eye' (translation by Katherine Woods ...
environmental effects on galaxy evolution in nearby clusters
... is studied. The main goals of this thesis are: (a) The study of the dependence of the UV emission of galaxies from their morphological type, mass and the environment they inhabit, through the study of UV luminosity functions and color magnitude relations. (b) The study of UV dust extinction properti ...
... is studied. The main goals of this thesis are: (a) The study of the dependence of the UV emission of galaxies from their morphological type, mass and the environment they inhabit, through the study of UV luminosity functions and color magnitude relations. (b) The study of UV dust extinction properti ...
harlow shapley - National Academy of Sciences
... of delivering a message to a group of colonists. The boy apparently made the trip across the river and back safely and did deliver the message. There is an old "Shapley House" somewhere in Connecticut facing the ocean. To return to the Shapleys in Missouri. Horace was not interested in being properl ...
... of delivering a message to a group of colonists. The boy apparently made the trip across the river and back safely and did deliver the message. There is an old "Shapley House" somewhere in Connecticut facing the ocean. To return to the Shapleys in Missouri. Horace was not interested in being properl ...
Probing nuclear activity versus star formation at z ∼ 0.8 using near
... The latter authors found that the period of moderately luminous AGN activity does not seem to have strong influence on the star formation activity of the galaxies, in contradiction with the results found at low redshift (e.g. Ho 2005). For example, based on FIR data from the Herschel Space Observato ...
... The latter authors found that the period of moderately luminous AGN activity does not seem to have strong influence on the star formation activity of the galaxies, in contradiction with the results found at low redshift (e.g. Ho 2005). For example, based on FIR data from the Herschel Space Observato ...
Descartes and sunspots: Matters of fact and systematizing strategies
... first matter—and may also be transformed back into it—only during the business as usual cosmological patterns of activity on the surfaces of stars. Similarly, in the Principles, Descartes’ theory of magnetism, in what we shall term its ‘cosmic’, rather than merely terrestrial applications, is crucia ...
... first matter—and may also be transformed back into it—only during the business as usual cosmological patterns of activity on the surfaces of stars. Similarly, in the Principles, Descartes’ theory of magnetism, in what we shall term its ‘cosmic’, rather than merely terrestrial applications, is crucia ...
Protoplanetary Disks and their Evolution
... the early formation stages due to the relatively high mass fraction in the disk versus that accreted onto the protostar. The instabilities would lead to sporadic bursts of high accretion and effectively self-regulate the disk mass from growing faster than the star (Vorobyov & Basu 2005, 2006; Voroby ...
... the early formation stages due to the relatively high mass fraction in the disk versus that accreted onto the protostar. The instabilities would lead to sporadic bursts of high accretion and effectively self-regulate the disk mass from growing faster than the star (Vorobyov & Basu 2005, 2006; Voroby ...
Lichtenknecker- Database of the BAV
... series of photographic pictures or visual observations. In addition reports about weak images on photographic plates are included, although these are no minimum in the proper meaning. The criteria for an inclusion of eclipsing binaries into the database are a magnitude not fainter than 13mag during ...
... series of photographic pictures or visual observations. In addition reports about weak images on photographic plates are included, although these are no minimum in the proper meaning. The criteria for an inclusion of eclipsing binaries into the database are a magnitude not fainter than 13mag during ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.