Measurements of Neutron Star Masses
... across the ∼2 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 epoch ...
... across the ∼2 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 epoch ...
Spiral Galaxies - Astronomy Centre
... • Spiral disks are relatively blue due to light from hot, massive, young stars • Elliptical galaxies are relatively red due to the dominant population of older, lower-mass stars ...
... • Spiral disks are relatively blue due to light from hot, massive, young stars • Elliptical galaxies are relatively red due to the dominant population of older, lower-mass stars ...
structure and evolution of white dwarfs and their
... optical spectra and classification according to the characteristics revealed. A number of physical processes can alter the atmospheric composition of a white dwarf as it cools. As noted by Schatzmann (1958), the strong gravitational field (log g ~ 8 at the surface) causes rapid downward diffusion of ...
... optical spectra and classification according to the characteristics revealed. A number of physical processes can alter the atmospheric composition of a white dwarf as it cools. As noted by Schatzmann (1958), the strong gravitational field (log g ~ 8 at the surface) causes rapid downward diffusion of ...
PDF
... including H, C, N, O and H2 . With future surveys likely to find even more targets including possible super-Earths, THEIA’s FUV capabilities will be an important complement to our direct imaging program. How do planets form?[5] With its starlight suppression system, THEIA will make the most sensitiv ...
... including H, C, N, O and H2 . With future surveys likely to find even more targets including possible super-Earths, THEIA’s FUV capabilities will be an important complement to our direct imaging program. How do planets form?[5] With its starlight suppression system, THEIA will make the most sensitiv ...
Element Segregation in Low Metallicity Stars and the Primordial
... radiative opacities by Iglesias & Rogers (1996), completed with the atomic and molecular opacities by Alexander & Ferguson (1994). The equation of state is described with a set of MHD tables (Mihalas, Hummer & Däppen 1988) specifically calculated for the mass and metallicity domain we study here (C ...
... radiative opacities by Iglesias & Rogers (1996), completed with the atomic and molecular opacities by Alexander & Ferguson (1994). The equation of state is described with a set of MHD tables (Mihalas, Hummer & Däppen 1988) specifically calculated for the mass and metallicity domain we study here (C ...
Disentangling degenerate solutions from primary transit and
... transit measurements of HD 189733b at near-IR wavelengths displayed features indicative of the presence of water, consistent with its expected large abundance and dominant role in the spectra of hot Jupiter exoplanets [3,4]. Thermal emission was first detected from measurements of HD 209458b’s passag ...
... transit measurements of HD 189733b at near-IR wavelengths displayed features indicative of the presence of water, consistent with its expected large abundance and dominant role in the spectra of hot Jupiter exoplanets [3,4]. Thermal emission was first detected from measurements of HD 209458b’s passag ...
Detectability of extrasolar moons as gravitational microlenses
... might be the presence of a large natural satellite – a moon – which stabilises the rotation axis of the planet and thereby the surface climate (Benn 2001). It has also been suggested that a large moon itself might be a good candidate for offering habitable conditions (Scharf 2006). In the solar syste ...
... might be the presence of a large natural satellite – a moon – which stabilises the rotation axis of the planet and thereby the surface climate (Benn 2001). It has also been suggested that a large moon itself might be a good candidate for offering habitable conditions (Scharf 2006). In the solar syste ...
Night Photography
... Star Tracer can't determine what is and isn't a star...by default it rotates the entire image. You can create a “mask” layer in the input image to prevent “non-star” areas from being rotated. ...
... Star Tracer can't determine what is and isn't a star...by default it rotates the entire image. You can create a “mask” layer in the input image to prevent “non-star” areas from being rotated. ...
http://www.highpoint.edu/~afuller/PHY-1050
... • The pressure waves speed up and become full shock waves that work their way toward the surface. • If the remainder of the iron core is less than roughly 1.2 Msun, the shock waves “snowplow” the H-rich envelope and the remainder of the nuclear-processed matter in front of it. • If the remainder of ...
... • The pressure waves speed up and become full shock waves that work their way toward the surface. • If the remainder of the iron core is less than roughly 1.2 Msun, the shock waves “snowplow” the H-rich envelope and the remainder of the nuclear-processed matter in front of it. • If the remainder of ...
What did we learn from transiting planets?
... to harbor planets (PSR B1620-26 b, PSR B1719-14 b) ...
... to harbor planets (PSR B1620-26 b, PSR B1719-14 b) ...
How we found about BLACK HOLES
... The more massive a star, the more tightly its gravity pulls it together and the hotter it must be to keep it from collapsing. The hotter it is, the more rapidly it uses up its hydrogen fuel. For that reason a massive star has a shorter lifetime than a less massive star. It takes a star as massive as ...
... The more massive a star, the more tightly its gravity pulls it together and the hotter it must be to keep it from collapsing. The hotter it is, the more rapidly it uses up its hydrogen fuel. For that reason a massive star has a shorter lifetime than a less massive star. It takes a star as massive as ...
Stellar evolution - Statistical Physics Group
... into space, but direct observation of the evolution of most stars seems impossible. Typically evolutionary time scales are between loe and 10lo years. Despite this, studies of stellar evolution have progressed considerably. On the observational side, it has been realized that, although the classific ...
... into space, but direct observation of the evolution of most stars seems impossible. Typically evolutionary time scales are between loe and 10lo years. Despite this, studies of stellar evolution have progressed considerably. On the observational side, it has been realized that, although the classific ...
Astronomy, Astrophysics, and Cosmology
... because each crest has little farther to go on its journey to us than crest before Time between crests + wavelength divided by wave speed so a wave sent out by a source moving away from us will appear to have longer wavelength than source @ rest Likewise + if source is moving toward us time between ...
... because each crest has little farther to go on its journey to us than crest before Time between crests + wavelength divided by wave speed so a wave sent out by a source moving away from us will appear to have longer wavelength than source @ rest Likewise + if source is moving toward us time between ...
Telescopes
... is located in a naturally occurring sinkhole that formed when water flowing underground dissolved the limestone rock. If this telescope were not supported by the ground, it would collapse under its own weight. Since the telescope is set into the ground it cannot be aimed to different parts of the sk ...
... is located in a naturally occurring sinkhole that formed when water flowing underground dissolved the limestone rock. If this telescope were not supported by the ground, it would collapse under its own weight. Since the telescope is set into the ground it cannot be aimed to different parts of the sk ...
Remote sensing of extrasolar planets
... – For example, what is the role of NGS in high order MCAO? • Can lesser, but sufficient, sky coverage may be available with fewer (or even no) LGS beacons – Probability of finding N=5 guides stars of mV < 14 within 6 arcmin diameter is ~ 10% » Can MCAO be extended to exploit such large area? » What ...
... – For example, what is the role of NGS in high order MCAO? • Can lesser, but sufficient, sky coverage may be available with fewer (or even no) LGS beacons – Probability of finding N=5 guides stars of mV < 14 within 6 arcmin diameter is ~ 10% » Can MCAO be extended to exploit such large area? » What ...
On disc driven inward migration of resonantly coupled planets with
... leads to the orbital separation of the planets being slightly larger than that required for a strict 2:1 commensurability without considering the history in detail as it is beyond the scope of this paper. However, we comment that this might have been complicated with the planet masses varying with t ...
... leads to the orbital separation of the planets being slightly larger than that required for a strict 2:1 commensurability without considering the history in detail as it is beyond the scope of this paper. However, we comment that this might have been complicated with the planet masses varying with t ...
15-3 Notes: Galaxies
... Irregular galaxies are galaxies that have no definite shape. The smallest irregular galaxies have only about 10 million stars. The largest irregular galaxies can contain several billion stars. Galaxies contain not only stars and planetary systems. Large features, such as gas clouds and star clusters ...
... Irregular galaxies are galaxies that have no definite shape. The smallest irregular galaxies have only about 10 million stars. The largest irregular galaxies can contain several billion stars. Galaxies contain not only stars and planetary systems. Large features, such as gas clouds and star clusters ...
LAB #5 - GEOCITIES.ws
... A, F, G, K, and M, and though the letter designations have no meaning other than that imposed on them by history, the names have stuck to this day. Each spectral class is divided into tenths, so that a B0 star follows an O9, and an A0, a B9. The early spectral classification system was based on the ...
... A, F, G, K, and M, and though the letter designations have no meaning other than that imposed on them by history, the names have stuck to this day. Each spectral class is divided into tenths, so that a B0 star follows an O9, and an A0, a B9. The early spectral classification system was based on the ...
Carbon, nitrogen, oxygen and lithium abundances of six
... –0.15 dex indicates a slight deficiency in carbon plus nitrogen with respect to the Sun, similar to the deficiencies found in Galactic supergiants and Orion. Lithium has been detected in all the program stars, reaching (Li)=0.6 dex for two stars. Key words: stars: abundances; supergiants – galaxies ...
... –0.15 dex indicates a slight deficiency in carbon plus nitrogen with respect to the Sun, similar to the deficiencies found in Galactic supergiants and Orion. Lithium has been detected in all the program stars, reaching (Li)=0.6 dex for two stars. Key words: stars: abundances; supergiants – galaxies ...
Extrasolar Cosmochemistry
... atmosphere. These stars are typically the radius of Earth and slowly cool from an initial outer temperature above 100,000 K. Once the effective temperature of the atmosphere falls below 20,000 K, radiative levitation—the process of supporting an element in the atmosphere by the upward flow of radiati ...
... atmosphere. These stars are typically the radius of Earth and slowly cool from an initial outer temperature above 100,000 K. Once the effective temperature of the atmosphere falls below 20,000 K, radiative levitation—the process of supporting an element in the atmosphere by the upward flow of radiati ...
Early Star-Forming Galaxies
... stars cannot be seen in visible light because they are buried inside dense clouds of molecular hydrogen that are laced with dust. Previous observations by ground-based telescopes made at submillimeter wavelengths found only a few massive galaxies within the epoch of interest. Researchers calculated ...
... stars cannot be seen in visible light because they are buried inside dense clouds of molecular hydrogen that are laced with dust. Previous observations by ground-based telescopes made at submillimeter wavelengths found only a few massive galaxies within the epoch of interest. Researchers calculated ...
1998 - Universitäts-Sternwarte München
... line profiles. It turns out, that eventually a few metal-poor stars with negligible vsini’s require somewhat lower RT values than proposed by Gray’s work. As a final remark, we note that the atmospheric parameters presented in this work are by no means obtained in a straightforward manner. Several ...
... line profiles. It turns out, that eventually a few metal-poor stars with negligible vsini’s require somewhat lower RT values than proposed by Gray’s work. As a final remark, we note that the atmospheric parameters presented in this work are by no means obtained in a straightforward manner. Several ...
Mn, Cu, and Zn abundances in barium stars and their correlations
... In the present work we derived the abundances based on a spectrum synthesis for 14 stars that were previously analyzed by Smiljanic et al. (2007). Although the focus of this paper is on performing relations between abundances of some iron peak and heavy elements, other elements than those discussed ...
... In the present work we derived the abundances based on a spectrum synthesis for 14 stars that were previously analyzed by Smiljanic et al. (2007). Although the focus of this paper is on performing relations between abundances of some iron peak and heavy elements, other elements than those discussed ...