The Milky Way Galaxy
... •A rotating ring or disk of matter a few parsecs across •A strong X-ray source at the center Astronomy 1-2 ...
... •A rotating ring or disk of matter a few parsecs across •A strong X-ray source at the center Astronomy 1-2 ...
Constraints on Long-Period Planets from an L
... the bright known binary stars in our sample. We present our conclusions in Section 6. Constraints on planet populations based on our survey null result are presented in our concurrently published ...
... the bright known binary stars in our sample. We present our conclusions in Section 6. Constraints on planet populations based on our survey null result are presented in our concurrently published ...
13_Testbank - Lick Observatory
... less dense. This is due to it being "puffed up" from the high temperatures in such a close orbit around its host star. 6) The star Rho Cancri B has about the same mass as our Sun, and the planet discovered around it orbits somewhat closer than Mercury orbits our Sun. The mass of the planet is estima ...
... less dense. This is due to it being "puffed up" from the high temperatures in such a close orbit around its host star. 6) The star Rho Cancri B has about the same mass as our Sun, and the planet discovered around it orbits somewhat closer than Mercury orbits our Sun. The mass of the planet is estima ...
Introducing Pushya
... Chitrapaksha ayanamsa, popularly known as Lahiri ayanamsa, takes Chitra nakshatra as the anchor of the zodiac. As per Surya Siddhanta, the yogatara of Chitra nakshatra is the brightest star in the constellation and its longitude is 180° from the start of Aries and its latitude is 2° south of the ecl ...
... Chitrapaksha ayanamsa, popularly known as Lahiri ayanamsa, takes Chitra nakshatra as the anchor of the zodiac. As per Surya Siddhanta, the yogatara of Chitra nakshatra is the brightest star in the constellation and its longitude is 180° from the start of Aries and its latitude is 2° south of the ecl ...
Close Double Stars from Video
... Astronomical Research Institute of Thailand, [email protected] • He worked before for a long time at the European Southern Observatory, where he still makes most of his observations • Most observations are recorded in the infrared, allowing higher S/N and even some daytime observations • Observatio ...
... Astronomical Research Institute of Thailand, [email protected] • He worked before for a long time at the European Southern Observatory, where he still makes most of his observations • Most observations are recorded in the infrared, allowing higher S/N and even some daytime observations • Observatio ...
Starlight Natal Report
... and meanings of a sky full of stars. Not all the stars, just those that formed links to your natal planets via what is called parans. By considering the star parans in your life you will be encountering a whole new (though very old) layer of myth and meaning to your chart. Welcome to your Stars. Eac ...
... and meanings of a sky full of stars. Not all the stars, just those that formed links to your natal planets via what is called parans. By considering the star parans in your life you will be encountering a whole new (though very old) layer of myth and meaning to your chart. Welcome to your Stars. Eac ...
DUSTY CIRCUMSTELLAR DISKS B. Zuckerman
... NICMOS camera on the HST (Figure 1, lefthand panel). Two very different classes of models have been proposed to explain this remarkable structure. The narrow containment of the ring particles and the abrupt inner and outer truncation of the ring around this relatively young star suggests dynamical c ...
... NICMOS camera on the HST (Figure 1, lefthand panel). Two very different classes of models have been proposed to explain this remarkable structure. The narrow containment of the ring particles and the abrupt inner and outer truncation of the ring around this relatively young star suggests dynamical c ...
IAU-Perraut-2013 - Putting A Stars into Context
... In addition to their many other peculiarities, the ages of A stars are poorly known. As main sequence stars, they evolve in Teff and in L/R, which affords an opportunity to establish their ages through interferometric means. Observational data can be compared to models on an H-R diagram, which will ...
... In addition to their many other peculiarities, the ages of A stars are poorly known. As main sequence stars, they evolve in Teff and in L/R, which affords an opportunity to establish their ages through interferometric means. Observational data can be compared to models on an H-R diagram, which will ...
Effect of the stellar spin history on the tidal evolution of close
... planet’s evolution is apparent for less massive (1 M⊕ ) planets and typical dissipation values. We also find that planetary evolution can have significant effects on the stellar spin history. In particular, when a planet falls onto the star, it can cause the star to spin up. Conclusions. Tidal evolut ...
... planet’s evolution is apparent for less massive (1 M⊕ ) planets and typical dissipation values. We also find that planetary evolution can have significant effects on the stellar spin history. In particular, when a planet falls onto the star, it can cause the star to spin up. Conclusions. Tidal evolut ...
Long-term monitoring of the short period SU UMa
... Key words: accretion, accretion disks — stars: dwarf novae — stars: individual (V844 Herculis) — stars: novae, cataclysmic variables — stars: oscillations ...
... Key words: accretion, accretion disks — stars: dwarf novae — stars: individual (V844 Herculis) — stars: novae, cataclysmic variables — stars: oscillations ...
Chapter 12 Quiz, Nov. 28, 2012, Astro 162, Section 4 12-1
... The O and B stars formed in the spiral arms explode as supernovae before they emerge from the arms. Therefore, these stars are not found between the arms of spiral galaxies. 12-33. Describe the Sun’s motion through our Galaxy. About how long is one orbit? An elliptical orbit, with the Sun oscillatin ...
... The O and B stars formed in the spiral arms explode as supernovae before they emerge from the arms. Therefore, these stars are not found between the arms of spiral galaxies. 12-33. Describe the Sun’s motion through our Galaxy. About how long is one orbit? An elliptical orbit, with the Sun oscillatin ...
Stellar-mass Black Hole Formation
... calculations); 3.2 Msun (upper limit from causality; Lattimer & Prakash ) ~109 SMBHs in the Galaxy, from stellar popn modeling (Brown & Bethe 1994) 20 confirmed black holes in X-ray binaries, with secure masses (as of 2006) mass gap between NS and BHs? characteristic or range of masses? ...
... calculations); 3.2 Msun (upper limit from causality; Lattimer & Prakash ) ~109 SMBHs in the Galaxy, from stellar popn modeling (Brown & Bethe 1994) 20 confirmed black holes in X-ray binaries, with secure masses (as of 2006) mass gap between NS and BHs? characteristic or range of masses? ...
Mergers of massive main sequence binaries
... potential to merge on the main sequence and thus we could distinguish between single stars, binaries that quite certainly do not merge on their main sequence (which we will refer to as unevolved binaries) and mergers that originate from close main-sequence binaries. This allowed us to make statement ...
... potential to merge on the main sequence and thus we could distinguish between single stars, binaries that quite certainly do not merge on their main sequence (which we will refer to as unevolved binaries) and mergers that originate from close main-sequence binaries. This allowed us to make statement ...
Title: Binary interaction dominates the evolution of massive stars
... powerful explosions, massive stars heat and enrich surrounding gas clouds in which new generations of stars form (4) and drive the chemical evolution of galaxies (5). Massive stars end their lives in luminous explosions, as core-collapse supernovae (CCSNe) or gamma-ray bursts (GRBs), which can be ob ...
... powerful explosions, massive stars heat and enrich surrounding gas clouds in which new generations of stars form (4) and drive the chemical evolution of galaxies (5). Massive stars end their lives in luminous explosions, as core-collapse supernovae (CCSNe) or gamma-ray bursts (GRBs), which can be ob ...
Stellar radii from long-baseline interferometry
... it one of the fastest moving stars in terms of apparent displacement. Although some of this motion comes from the proximity of 61 Cyg to us, the pair is also moving fast into space relative to the Sun, at 108 km/s, indicating that 61 Cyg is not a member of the thin disk of our Galaxy. The proximity ...
... it one of the fastest moving stars in terms of apparent displacement. Although some of this motion comes from the proximity of 61 Cyg to us, the pair is also moving fast into space relative to the Sun, at 108 km/s, indicating that 61 Cyg is not a member of the thin disk of our Galaxy. The proximity ...
has occurred over the past 14 billion years COSMIC DOWNSIZING
... this task is to obtain a spectrum of each galaxy in the image and measure its redshift. Because of the universe’s expansion, the light from distant sources has been stretched, shifting its wavelength toward the red end of the spectrum. The more the light is shifted to the red, the farther away the s ...
... this task is to obtain a spectrum of each galaxy in the image and measure its redshift. Because of the universe’s expansion, the light from distant sources has been stretched, shifting its wavelength toward the red end of the spectrum. The more the light is shifted to the red, the farther away the s ...
Unravelling the Origin and Evolution of Our Galaxy
... than our Sun. These are all within a distance of about 100 light-years. The planets detectable by this method are rather massive, comparable to Jupiter (which has about 300 times the mass of Earth). The systems have some surprising properties: two thirds of these giant planets are orbiting their hos ...
... than our Sun. These are all within a distance of about 100 light-years. The planets detectable by this method are rather massive, comparable to Jupiter (which has about 300 times the mass of Earth). The systems have some surprising properties: two thirds of these giant planets are orbiting their hos ...
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.