Astronomers` Observing Guides
... There are many people in the astronomical and publishing community who have helped to make this book a reality. In particular, my many friends at Sky & Telescope and its parent company Sky Publishing Corporation have been especially helpful in supplying information and illustrations that have appea ...
... There are many people in the astronomical and publishing community who have helped to make this book a reality. In particular, my many friends at Sky & Telescope and its parent company Sky Publishing Corporation have been especially helpful in supplying information and illustrations that have appea ...
Hidden57_rf
... the narrow band of light that could penetrate the Earth’s atmosphere and was visible to our eyes or to sensitive photographic plates loaded at the focus of increasingly large telescopes. With these resources alone, the discoveries were still stupendous: the mapping of our Solar System, the identific ...
... the narrow band of light that could penetrate the Earth’s atmosphere and was visible to our eyes or to sensitive photographic plates loaded at the focus of increasingly large telescopes. With these resources alone, the discoveries were still stupendous: the mapping of our Solar System, the identific ...
Astronomy 114 - Department of Astronomy
... Interstellar gas and dust are common in the disk of the Galaxy Interstellar medium (ISM) Diffuse gas (atomic H and molecular hydrogen H2 ) Dust (formed in the envelopes of stars) ...
... Interstellar gas and dust are common in the disk of the Galaxy Interstellar medium (ISM) Diffuse gas (atomic H and molecular hydrogen H2 ) Dust (formed in the envelopes of stars) ...
Astronomy Astrophysics First detection of the field star overdensity in the Perseus... &
... stars rejected during the cleaning process. From now on we will distinguish between the subsamples containing the stars in the inner sky area (in suffix), from those where the stars located in the outer sky area are added (all suffix). Whereas the first subsample reaches fainter limiting magnitude, the ...
... stars rejected during the cleaning process. From now on we will distinguish between the subsamples containing the stars in the inner sky area (in suffix), from those where the stars located in the outer sky area are added (all suffix). Whereas the first subsample reaches fainter limiting magnitude, the ...
MASSIVE CLOSE BINARIES
... reviewed by Kudritzki and Puls (2000) (see also P. Crowther, in these proceedings). Note that ...
... reviewed by Kudritzki and Puls (2000) (see also P. Crowther, in these proceedings). Note that ...
Rotation Periods and Relative Ages of Solar-Type Stars
... The search for rotational signals was performed on a set of 102 LMS stars taken from the MWO sample. Criteria for these stars’ selection included a B - V color index similar to that of the sun’s (i.e., 0.55 < B - V < 0.76). The number of experimental data points each star had varied from 50 to over ...
... The search for rotational signals was performed on a set of 102 LMS stars taken from the MWO sample. Criteria for these stars’ selection included a B - V color index similar to that of the sun’s (i.e., 0.55 < B - V < 0.76). The number of experimental data points each star had varied from 50 to over ...
ULXs: General Properties and Variability - X
... •evidence against beaming (QPOs, broad Fe Lines, eclipses) •At least one object has a break in the PDS at the frequency predicted for M~1000M objects •Associated extended radio sources •General lack of optical Ids (massive stars would be seen) •they lie near, but not in star forming regions Kyoto me ...
... •evidence against beaming (QPOs, broad Fe Lines, eclipses) •At least one object has a break in the PDS at the frequency predicted for M~1000M objects •Associated extended radio sources •General lack of optical Ids (massive stars would be seen) •they lie near, but not in star forming regions Kyoto me ...
Astro 6590: Galaxies and the Universe Astro
... and about 10X as much by mass of dark matter. The stars and gas are about 70% hydrogen by mass and 25% helium, the rest being heavier elements (called "metals"). • Typical scales are: masses between 106 to 1012 M (1 solar mass is 2 x 1030 kg), and sizes ~ 1-100 kpc (1 pc = 3.1 x 1016 m). Galaxies t ...
... and about 10X as much by mass of dark matter. The stars and gas are about 70% hydrogen by mass and 25% helium, the rest being heavier elements (called "metals"). • Typical scales are: masses between 106 to 1012 M (1 solar mass is 2 x 1030 kg), and sizes ~ 1-100 kpc (1 pc = 3.1 x 1016 m). Galaxies t ...
Spectroscopic Variability of Supergiant Star HD14134, B3Ia
... a relatively structural changes (Fig.1b). Fig.1a shows that the shape of the CII lines change relatively during observations, as well as the radial velocities of the these lines varied between from -46 to -25 km s−1 (Table 3). Variability of the absorption lines indicates that disturbances are occur ...
... a relatively structural changes (Fig.1b). Fig.1a shows that the shape of the CII lines change relatively during observations, as well as the radial velocities of the these lines varied between from -46 to -25 km s−1 (Table 3). Variability of the absorption lines indicates that disturbances are occur ...
Radiative Precession of an Isolated Neutron Star
... Does the angular momentum vector of an isolated neutron star change orientation as the star spins down? Early attempts to answer this question focused on the evolution of the angle α between the star’s rotation and magnetic axes, which can be measured from pulsar polarization swings. Davis & Goldste ...
... Does the angular momentum vector of an isolated neutron star change orientation as the star spins down? Early attempts to answer this question focused on the evolution of the angle α between the star’s rotation and magnetic axes, which can be measured from pulsar polarization swings. Davis & Goldste ...
Spectroscopic Variability of Supergiant Star HD14134, B3Ia
... a relatively structural changes (Fig.1b). Fig.1a shows that the shape of the CII lines change relatively during observations, as well as the radial velocities of the these lines varied between from -46 to -25 km s−1 (Table 3). Variability of the absorption lines indicates that disturbances are occur ...
... a relatively structural changes (Fig.1b). Fig.1a shows that the shape of the CII lines change relatively during observations, as well as the radial velocities of the these lines varied between from -46 to -25 km s−1 (Table 3). Variability of the absorption lines indicates that disturbances are occur ...
Stars and Galaxies - Red Hook Central Schools
... http://hubblesite.org/newscenter/archive/releases/star/supernova/2004/09/results/50/ http://hubblesite.org/newscenter/archive/releases/nebula/supernova-remnant/2005/37/results/50/ http://chandra.harvard.edu/photo/2009/casa/ ...
... http://hubblesite.org/newscenter/archive/releases/star/supernova/2004/09/results/50/ http://hubblesite.org/newscenter/archive/releases/nebula/supernova-remnant/2005/37/results/50/ http://chandra.harvard.edu/photo/2009/casa/ ...
targets - siamois
... - less noise at low frequency - measurement of modes up to degree l= 3 - observation of bright stars very precise inversion and modelling ...
... - less noise at low frequency - measurement of modes up to degree l= 3 - observation of bright stars very precise inversion and modelling ...
HWWS 2010 - Monash University
... … and even some new flavours • Rotating radio transients (RRATs); “intermittent” radio pulsars • Soft Gamma-ray Repeaters (SGRs); isolated neutron stars that show (occasionally violent) gamma-ray outbursts & pulsations • Anomalous X-ray pulsars (AXPs); isolated neutron stars with long pulse periods ...
... … and even some new flavours • Rotating radio transients (RRATs); “intermittent” radio pulsars • Soft Gamma-ray Repeaters (SGRs); isolated neutron stars that show (occasionally violent) gamma-ray outbursts & pulsations • Anomalous X-ray pulsars (AXPs); isolated neutron stars with long pulse periods ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.