Towards the understanding of the deepest layers of solar
... provide high-quality seismic data. These seismic data combined with non-seismic surface stellar observables can provide valuable information about the global properties of pulsating stars, such as their mass, radius and age. Nevertheless, it is in their interiors, inaccessible to our eyes, that most ...
... provide high-quality seismic data. These seismic data combined with non-seismic surface stellar observables can provide valuable information about the global properties of pulsating stars, such as their mass, radius and age. Nevertheless, it is in their interiors, inaccessible to our eyes, that most ...
Semester 2016B - Gran Telescopio CANARIAS
... telescope and instrument commissioning work that will preferentially be carried out during bright time. The remaining 80% will be dedicated to programs that are granted time under this call, as well as guaranteed time for instrument builders and for the CCI International Time. We note that the RA ba ...
... telescope and instrument commissioning work that will preferentially be carried out during bright time. The remaining 80% will be dedicated to programs that are granted time under this call, as well as guaranteed time for instrument builders and for the CCI International Time. We note that the RA ba ...
HD 100453: An Evolutionary link between
... If motion through space is common, they are likely physical companions ...
... If motion through space is common, they are likely physical companions ...
instruction manual - NexStar Resource Site
... your journey through the Universe. It may take a few observing sessions to become familiar with your StarSeeker, so you should keep this manual handy until you have fully mastered your telescope’s operation. The StarSeeker hand control has built-in instructions to guide you through all the alignment ...
... your journey through the Universe. It may take a few observing sessions to become familiar with your StarSeeker, so you should keep this manual handy until you have fully mastered your telescope’s operation. The StarSeeker hand control has built-in instructions to guide you through all the alignment ...
Chandra Characterization of X-ray Emission in the Young F
... spectra than their lower mass brethren. For example, HD 100453 and the similarly aged 51 Eri (F0V) have coronal temperatures of about 0.2 keV as opposed to 1-2 keV for similarly aged GKM stars (Collins et al. 2009, Feigelson et al. 2006). Finally, the “FIP-effect” in which elements with first ioniza ...
... spectra than their lower mass brethren. For example, HD 100453 and the similarly aged 51 Eri (F0V) have coronal temperatures of about 0.2 keV as opposed to 1-2 keV for similarly aged GKM stars (Collins et al. 2009, Feigelson et al. 2006). Finally, the “FIP-effect” in which elements with first ioniza ...
PPT
... have supermassive black holes at their centers • These black holes seem to be dormant active ...
... have supermassive black holes at their centers • These black holes seem to be dormant active ...
GALAXIES 626
... Thin disk formation begins early, at z = 2 to 3 Partly disrupted during merger epoch which heats it into thick disk observed now The rest of the gas then gradually settles to form the present thin disk Not much is known about the radial extent of the thick disk. This is important, if the thick disk ...
... Thin disk formation begins early, at z = 2 to 3 Partly disrupted during merger epoch which heats it into thick disk observed now The rest of the gas then gradually settles to form the present thin disk Not much is known about the radial extent of the thick disk. This is important, if the thick disk ...
Annual Report 2006/2007
... Sciences in 1992. When NOVA was established as an inter-university collaboration, it was agreed that its legal representation (‘penvoerderschap’) should rotate between the participating universities. Accordingly, Leiden University (UL) and the University of Amsterdam (UvA) were penvoerder in the fir ...
... Sciences in 1992. When NOVA was established as an inter-university collaboration, it was agreed that its legal representation (‘penvoerderschap’) should rotate between the participating universities. Accordingly, Leiden University (UL) and the University of Amsterdam (UvA) were penvoerder in the fir ...
Sidereus Nuncius (Print Translation)
... method whereby I could measure the distances between them. In this matter, it behooves all those who wish to make such observations to be forewarned. For it is necessary first that they prepare a most accurate glass that shows objects brightly, distinctly, and not veiled by any obscurity, and second ...
... method whereby I could measure the distances between them. In this matter, it behooves all those who wish to make such observations to be forewarned. For it is necessary first that they prepare a most accurate glass that shows objects brightly, distinctly, and not veiled by any obscurity, and second ...
Article PDF - IOPscience
... irregular galaxy (SagDIG), which now places this object very close to the edge of the Local Group zerovelocity surface ; (3) more information on the evolutionary histories of some individual Local Group members ; and (4) improved distance determinations to, and luminosities for, a number of Local Gr ...
... irregular galaxy (SagDIG), which now places this object very close to the edge of the Local Group zerovelocity surface ; (3) more information on the evolutionary histories of some individual Local Group members ; and (4) improved distance determinations to, and luminosities for, a number of Local Gr ...
Discovery of two new satellites of Pluto
... a limiting sensitivity could be achieved that is very close to the observed magnitudes of P1 and P2 (see Table 1). On the observation date (UT 2002 June 14) with the best geometry (lowest phase angle and smallest geocentric distance), two objects are weakly detected (S/N < 4) along the predicted orb ...
... a limiting sensitivity could be achieved that is very close to the observed magnitudes of P1 and P2 (see Table 1). On the observation date (UT 2002 June 14) with the best geometry (lowest phase angle and smallest geocentric distance), two objects are weakly detected (S/N < 4) along the predicted orb ...
The physics of star formation
... of their high opacity, the rate at which they are heated by external radiation is low; the result is that molecular clouds are very cold and have typical temperatures of only about 10–20 K. Higher temperatures of up to 100 K or more may exist locally in regions heated by luminous newly formed stars. ...
... of their high opacity, the rate at which they are heated by external radiation is low; the result is that molecular clouds are very cold and have typical temperatures of only about 10–20 K. Higher temperatures of up to 100 K or more may exist locally in regions heated by luminous newly formed stars. ...
AstroMaster Series Telescopes
... amateur astronomy. In addition, your AstroMaster telescope is ideal for terrestrial observations which will open your eyes with superb high power viewing. AstroMaster telescopes carry a two year limited warranty. For details see our website at www.celestron.com Some of the many standard features of ...
... amateur astronomy. In addition, your AstroMaster telescope is ideal for terrestrial observations which will open your eyes with superb high power viewing. AstroMaster telescopes carry a two year limited warranty. For details see our website at www.celestron.com Some of the many standard features of ...
Star Formation in the Rosette Complex
... analyzed with multi-slit echelle spectroscopy in Hα, and these data revealed large systematic velocities of up to 20 km·s−1 at the cavity, a sign of rapid evacuation of material due to powerful stellar winds. A similar result was found by Smith (1973). The cluster itself has been the subject of many ...
... analyzed with multi-slit echelle spectroscopy in Hα, and these data revealed large systematic velocities of up to 20 km·s−1 at the cavity, a sign of rapid evacuation of material due to powerful stellar winds. A similar result was found by Smith (1973). The cluster itself has been the subject of many ...
Clusters: age scales for stellar physics
... (see Soderblom 2010). They provide, in principle, homogeneous samples of stars of different masses and the same chemical composition and age. However, other parameters, such as rotation, binarity, activity and magnetic fields, some of them interrelated, might play a significant role, as we will see. ...
... (see Soderblom 2010). They provide, in principle, homogeneous samples of stars of different masses and the same chemical composition and age. However, other parameters, such as rotation, binarity, activity and magnetic fields, some of them interrelated, might play a significant role, as we will see. ...
Save the Sky: Adventures in Sky Monitoring
... Objective (example): maximizing Type IA supernovae discovered Sky essentially isotropic (out of Galactic plane) N(l): > 1 for I < 24: stare preferred effectively creates a minimum observation time per field ...
... Objective (example): maximizing Type IA supernovae discovered Sky essentially isotropic (out of Galactic plane) N(l): > 1 for I < 24: stare preferred effectively creates a minimum observation time per field ...
- x sin a + ycos a = ad cos b
... of stars that have quite different kinematic properties. Indeed, within almost any group of stars chosen according to spectral type only, there will he a certain degree of kinematic heterogeneity, either because the group contains stars of widely differing ages or because it is composed of subgroups ...
... of stars that have quite different kinematic properties. Indeed, within almost any group of stars chosen according to spectral type only, there will he a certain degree of kinematic heterogeneity, either because the group contains stars of widely differing ages or because it is composed of subgroups ...
Program and Abstract Book - European Southern Observatory
... Mike Dunham (SUNY Fredonia, NY, USA) Stars form from the gravitational collapse of dense molecular cloud cores. In the protostellar phase, mass both accretes from the core onto a protostar, likely through an accretion disk, and is ejected in the form of jets and outflows. It is during this protostel ...
... Mike Dunham (SUNY Fredonia, NY, USA) Stars form from the gravitational collapse of dense molecular cloud cores. In the protostellar phase, mass both accretes from the core onto a protostar, likely through an accretion disk, and is ejected in the form of jets and outflows. It is during this protostel ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.