observations of white dwarfs in the solar neighborhood
... within 20 pc of the Sun. Holberg, Oswalt, & Sion (2002) have compiled a list of 109 white dwarfs that lie within 20 pc of the Sun, and they found that the sample is complete to 13 pc and 65% complete to 20 pc. Therefore, 50 white dwarfs remain undiscovered within 20 pc of the Sun. In combining accu ...
... within 20 pc of the Sun. Holberg, Oswalt, & Sion (2002) have compiled a list of 109 white dwarfs that lie within 20 pc of the Sun, and they found that the sample is complete to 13 pc and 65% complete to 20 pc. Therefore, 50 white dwarfs remain undiscovered within 20 pc of the Sun. In combining accu ...
A cold detached dust envelope around an oxygen-rich Mira
... on the spatial structure cannot be made in the 100 µm image since its spatial resolution and reliability are much poorer than those of the 60 µm image. In Fig. 2a the shape of the 60 µm extended circumstellar emission component seems almost circular, though it is somewhat distorted to be stretched i ...
... on the spatial structure cannot be made in the 100 µm image since its spatial resolution and reliability are much poorer than those of the 60 µm image. In Fig. 2a the shape of the 60 µm extended circumstellar emission component seems almost circular, though it is somewhat distorted to be stretched i ...
Asteroseismology and stellar rotation - IAG-Usp
... sound speed inversion : needs rotational mixing ? ...
... sound speed inversion : needs rotational mixing ? ...
X. Nuclear star clusters in low-mass early-type galaxies
... computations, the theoretical framework for the dissipational formation of NSCs provides less quantitative predictions than the inspiralling cluster scenario. There is evidence that both the in situ as well as the GC inspiralling formation happen in galaxies. Evidence for the GC inspiral scenario is ...
... computations, the theoretical framework for the dissipational formation of NSCs provides less quantitative predictions than the inspiralling cluster scenario. There is evidence that both the in situ as well as the GC inspiralling formation happen in galaxies. Evidence for the GC inspiral scenario is ...
monoceros, the unicorn
... to the world should endeavor to ban unicorns from Scripture. In order to do so, the latest technique is to suppose that God did not mean to say unicorn, or did not say so in the “original autographs” which, as they no longer exist having long since turned to dust, we (conveniently) cannot check. Hen ...
... to the world should endeavor to ban unicorns from Scripture. In order to do so, the latest technique is to suppose that God did not mean to say unicorn, or did not say so in the “original autographs” which, as they no longer exist having long since turned to dust, we (conveniently) cannot check. Hen ...
Observational Data
... star formation rate (>100Mo/yr), irregular and possibly merging-like morphologies, large masses, and strong redshift clustering, suggesting that they are massive early-type galaxies in the act of major assembly episodes. ...
... star formation rate (>100Mo/yr), irregular and possibly merging-like morphologies, large masses, and strong redshift clustering, suggesting that they are massive early-type galaxies in the act of major assembly episodes. ...
RXTE PCA Contributions to Monitoring Fast Transients
... between quiescence and steady accretion. Several sources have had variable accretion in the range 10 34-1035 ergs s-1 for years, while others have 1032-1033 ergs-1 and must cool quickly. Some of the transients may be black hole candidates, in which case black holes can have at least some of the same ...
... between quiescence and steady accretion. Several sources have had variable accretion in the range 10 34-1035 ergs s-1 for years, while others have 1032-1033 ergs-1 and must cool quickly. Some of the transients may be black hole candidates, in which case black holes can have at least some of the same ...
SpeX Observing Manual - NASA Infrared Telescope Facility
... SpeX is a medium-resolution infrared spectrograph built at the Institute for Astronomy (IfA), for the NASA Infrared Telescope Facility (IRTF) on Mauna Kea. The National Science Foundation (NSF) originally funded SpeX in 1996 with additional funding from NASA for the detector arrays in 1998. SpeX saw ...
... SpeX is a medium-resolution infrared spectrograph built at the Institute for Astronomy (IfA), for the NASA Infrared Telescope Facility (IRTF) on Mauna Kea. The National Science Foundation (NSF) originally funded SpeX in 1996 with additional funding from NASA for the detector arrays in 1998. SpeX saw ...
Neutrinos and Nucleosynthesis
... Scientists all over the world try to solve the question why the universe looks the way it does today. The formation of heavy elements like the ones found on earth is one big aspect of this search because it is expected to give great insight into the evolution process of our universe. Especially, the ...
... Scientists all over the world try to solve the question why the universe looks the way it does today. The formation of heavy elements like the ones found on earth is one big aspect of this search because it is expected to give great insight into the evolution process of our universe. Especially, the ...
THE DAWN OF X-RAY ASTRONOMY
... optical counterpart should have magnitude 13. In a first rocket flight to measure the angular size of the source it was found to be less than 7 arc sec (Oda et al., 1965).7 Thus the source had to be a visible star and not a diffused nebulosity. This led to the sophisticated measurement of the locati ...
... optical counterpart should have magnitude 13. In a first rocket flight to measure the angular size of the source it was found to be less than 7 arc sec (Oda et al., 1965).7 Thus the source had to be a visible star and not a diffused nebulosity. This led to the sophisticated measurement of the locati ...
NexStar GT - Celestron
... the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to become familiar with your NexStar, so you should keep this manual handy until you have ...
... the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to become familiar with your NexStar, so you should keep this manual handy until you have ...
LACEwING: A New Moving Group Analysis Code
... moving group identification code. Using the spatial and kinematic information available about a target object (α, δ, Dist, μα, μδ, and γ), it determines the probability that the object is a member of each of the known NYMGs (Table 1). As with other moving group identification codes, LACEwING is capabl ...
... moving group identification code. Using the spatial and kinematic information available about a target object (α, δ, Dist, μα, μδ, and γ), it determines the probability that the object is a member of each of the known NYMGs (Table 1). As with other moving group identification codes, LACEwING is capabl ...
Document
... Using IRAM and SCUBA: ~30% of radio-quiet quasars at z>4 detected at 1mm (observed frame) at 1mJy level submm radiation in radio-quiet quasars come from thermal dust with mass ~ 108 Msun • If dust heating came from starburst star formation rate of Arp 220 500 – 2000 Msun/year Quasars are likely ...
... Using IRAM and SCUBA: ~30% of radio-quiet quasars at z>4 detected at 1mm (observed frame) at 1mJy level submm radiation in radio-quiet quasars come from thermal dust with mass ~ 108 Msun • If dust heating came from starburst star formation rate of Arp 220 500 – 2000 Msun/year Quasars are likely ...
Astrometry of Asteroids
... the corner or to the origin of the graphs. The coordinates that are commonly used to specify star positions in astronomy indicate the star’s position with respect to the celestial equator, an imaginary line in the sky that runs above the earth’s equator, and are therefore called the equatorial coord ...
... the corner or to the origin of the graphs. The coordinates that are commonly used to specify star positions in astronomy indicate the star’s position with respect to the celestial equator, an imaginary line in the sky that runs above the earth’s equator, and are therefore called the equatorial coord ...
Pulsed Accretion in the Young Binary &
... When Yi saw how parched and desolate the earth had become, he was moved to tears. Especially terrible was the people's bitter hatred of the ten suns. Yi wasted no time in fitting an arrow to his magic bow and drawing it. He called out to the suns and warned them that he was about to shoot. But the b ...
... When Yi saw how parched and desolate the earth had become, he was moved to tears. Especially terrible was the people's bitter hatred of the ten suns. Yi wasted no time in fitting an arrow to his magic bow and drawing it. He called out to the suns and warned them that he was about to shoot. But the b ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.