Weak magnetic fields in early-type stars: failed
... even the most strongly magnetized Ap star, all but 10−3 of the flux must be lost; to make Sirius’ field, less than 10−8 can be retained. And finally, scenario (iii) can be ruled out if, as expected, the young star contained a dynamo field powered by either differential rotation or convection (see th ...
... even the most strongly magnetized Ap star, all but 10−3 of the flux must be lost; to make Sirius’ field, less than 10−8 can be retained. And finally, scenario (iii) can be ruled out if, as expected, the young star contained a dynamo field powered by either differential rotation or convection (see th ...
There are 88 constellations in the sky around the Earth. 12 are the
... became a popular sport of kings and a necessity to keep their populations down. The lion is associated with the warrior goddess, Istar. Representations of the hero-king Gilgamesh often show him with a club in one hand and a lion in the other. The sickle shape of the constellation containing the bri ...
... became a popular sport of kings and a necessity to keep their populations down. The lion is associated with the warrior goddess, Istar. Representations of the hero-king Gilgamesh often show him with a club in one hand and a lion in the other. The sickle shape of the constellation containing the bri ...
Stellar-Mass Black Holes and Ultraluminous X
... onto the central black hole. The disc, radio emission at gigahertz radio fredisc initially neutral, slowly rises in temperquencies (11). This radio emission ature as the mass accumulates, until (LR) correlates in strength with the at some point it reaches ~4000 K and x-ray emission (LX) in a nonline ...
... onto the central black hole. The disc, radio emission at gigahertz radio fredisc initially neutral, slowly rises in temperquencies (11). This radio emission ature as the mass accumulates, until (LR) correlates in strength with the at some point it reaches ~4000 K and x-ray emission (LX) in a nonline ...
Assessing the massive young Sun hypothesis to solve the warm
... stratosphere and is lost due to UV dissociation and escape of hydrogen (Kasting 1988). Such a process is thought to have occurred on Venus (Kasting & Pollack 1983). Whitmire et al. (1995) suggested that a young Sun 3%–7% more massive would be able to explain the evidence of liquid water on the surfa ...
... stratosphere and is lost due to UV dissociation and escape of hydrogen (Kasting 1988). Such a process is thought to have occurred on Venus (Kasting & Pollack 1983). Whitmire et al. (1995) suggested that a young Sun 3%–7% more massive would be able to explain the evidence of liquid water on the surfa ...
PowerPoint Presentation - Isolated Neutron Stars, solid crust
... Over the last few years, intense observational resources have been devoted to study the faint thermal emission from neutron stars and to search for features in their spectrum. Isolated neutron stars play a key role in compact objects astrophysics: these are the only sources in which we can see direc ...
... Over the last few years, intense observational resources have been devoted to study the faint thermal emission from neutron stars and to search for features in their spectrum. Isolated neutron stars play a key role in compact objects astrophysics: these are the only sources in which we can see direc ...
structure and evolution of white dwarfs and their
... ideas remain unchanged. However, importantly, they have also hardly been tested by direct observation. Theoretical and observational study of stellar evolution has placed white dwarfs as one possible end point of the process. In general terms, all stars with masses below about eight times that of th ...
... ideas remain unchanged. However, importantly, they have also hardly been tested by direct observation. Theoretical and observational study of stellar evolution has placed white dwarfs as one possible end point of the process. In general terms, all stars with masses below about eight times that of th ...
Measurements of Neutron Star Masses
... Arecibo observation.We calculated the bestfit DM for each of the 16 bins individually, keeping other timing parameters fixed at the best-fit values (Table 3). We then investigate the DM versus orbital phase for each epoch, as plotted in Fig. 10. Although variations at individual epochs are somewhat ...
... Arecibo observation.We calculated the bestfit DM for each of the 16 bins individually, keeping other timing parameters fixed at the best-fit values (Table 3). We then investigate the DM versus orbital phase for each epoch, as plotted in Fig. 10. Although variations at individual epochs are somewhat ...
Orion the Hunter
... south. Betelgeuse is a red giant half as far away as Rigel. With an angular size of over 0.1", Betelgeuse’s diameter would encompass the orbit of Jupiter. All three of Orion’s “belt stars” are blue-white suns of very similar spectral types. On transparent nights, look for the large number of 6thand ...
... south. Betelgeuse is a red giant half as far away as Rigel. With an angular size of over 0.1", Betelgeuse’s diameter would encompass the orbit of Jupiter. All three of Orion’s “belt stars” are blue-white suns of very similar spectral types. On transparent nights, look for the large number of 6thand ...
Potential for Life on the Terrestrial Planets
... measured radius and mass (Léger et al., 2009), and therefore with a known density, has opened up a new research era. While the European COnvection, ROtation and planetary Transits (CoRoT) space observatory has demonstrated that exoplanets can be observed via transits from space, due to the mission d ...
... measured radius and mass (Léger et al., 2009), and therefore with a known density, has opened up a new research era. While the European COnvection, ROtation and planetary Transits (CoRoT) space observatory has demonstrated that exoplanets can be observed via transits from space, due to the mission d ...
Bill Gray 168 Ridge Road Bowdoinham, ME 04008 ph (207) 666
... will then pause some more while it grabs GSC data for that ...
... will then pause some more while it grabs GSC data for that ...
June 2010 - Denver Astronomical Society
... and disconnected the power lines to prevent further damage or possible injury. The DSS Committee, headed by Darrell Dodge, did an assessment of the damage, and with help of engineer Glen Frank, has come up with a plan to repair and move the building back in place. After a brief review, the E-Board a ...
... and disconnected the power lines to prevent further damage or possible injury. The DSS Committee, headed by Darrell Dodge, did an assessment of the damage, and with help of engineer Glen Frank, has come up with a plan to repair and move the building back in place. After a brief review, the E-Board a ...
The Interstellar Medium
... 20. The best vacuum chambers on Earth can reach densities of about 1,000,000 atoms per cubic centimeter. Which of the four components of the interstellar medium has lower densities than such a chamber? a. The hot coronal gas. b. The hot coronal gas and HII intercloud medium. c. The hot coronal gas, ...
... 20. The best vacuum chambers on Earth can reach densities of about 1,000,000 atoms per cubic centimeter. Which of the four components of the interstellar medium has lower densities than such a chamber? a. The hot coronal gas. b. The hot coronal gas and HII intercloud medium. c. The hot coronal gas, ...
Galaxy Structure
... satellites appear to be located near two great circles in the sky (Lynden-Bell 1976). The corona extends out to approximately 100 kpc and may account for as much as (3–6) × 1012M⊙ (Fich and Tremaine 1991). It exceeds by far the mass contained in the spiral disk and bulge region. ...
... satellites appear to be located near two great circles in the sky (Lynden-Bell 1976). The corona extends out to approximately 100 kpc and may account for as much as (3–6) × 1012M⊙ (Fich and Tremaine 1991). It exceeds by far the mass contained in the spiral disk and bulge region. ...
Neil F. Comins - Kuwait Life Sciences Company
... the preceding sections of the chapters and thereby correct their beliefs before errors accumulate. For example, after learning about Uranus’s ring system in Section 5-29, students are asked why Uranus’s rings remain in orbit. Answers to approximately one-third of these questions appear at the end of ...
... the preceding sections of the chapters and thereby correct their beliefs before errors accumulate. For example, after learning about Uranus’s ring system in Section 5-29, students are asked why Uranus’s rings remain in orbit. Answers to approximately one-third of these questions appear at the end of ...
Microsoft Word 97
... 1) The Nuclear Bulge – Our galaxy has the general shape of a pancake with a bulge at its center that contains millions of stars, primarily old ones. This nuclear bulge has the galactic nucleus at its center. The nucleus itself if only about 10 light-years across. 2) The Disk – The part of the pancak ...
... 1) The Nuclear Bulge – Our galaxy has the general shape of a pancake with a bulge at its center that contains millions of stars, primarily old ones. This nuclear bulge has the galactic nucleus at its center. The nucleus itself if only about 10 light-years across. 2) The Disk – The part of the pancak ...
Origin and evolution of magnetars
... observations of all magnetars with known Ṗ . Thus, among the observed objects we have also included SGR 0526−66, which is located in the LMC, and CXOU J010043−721134, which is in the SMC, since their positions in the P − Ṗ diagram are unlikely to depend on which galaxy they reside. The predicted n ...
... observations of all magnetars with known Ṗ . Thus, among the observed objects we have also included SGR 0526−66, which is located in the LMC, and CXOU J010043−721134, which is in the SMC, since their positions in the P − Ṗ diagram are unlikely to depend on which galaxy they reside. The predicted n ...
Proposal submitted to ISSI
... considered without a more general characterization of the observed planets. It is thus necessary to study the potential signatures of life in the context of the expected diversity of planets and the evolution or modification of their atmospheres due to the interaction with energetic particles (cosmi ...
... considered without a more general characterization of the observed planets. It is thus necessary to study the potential signatures of life in the context of the expected diversity of planets and the evolution or modification of their atmospheres due to the interaction with energetic particles (cosmi ...
b. - UW Canvas
... dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? ...
... dependence of the parallax angle on the distance an object is from Earth. If the minimum parallax angle we could measure were 0.5 arcsec, what is the maximum distance of a star that we could measure? ...
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.