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 ...
The Deaths of Very Massive Stars
... either to a wind or a binary companion, yet its remnant contains a neutron star. If the mass loss was to a companion, as is currently thought, then the progenitor mass was probably less than 20 M⊙ , but if a star of 30 M⊙ could explode after losing most of its envelope, this might provide an alterna ...
... either to a wind or a binary companion, yet its remnant contains a neutron star. If the mass loss was to a companion, as is currently thought, then the progenitor mass was probably less than 20 M⊙ , but if a star of 30 M⊙ could explode after losing most of its envelope, this might provide an alterna ...
The Norma cluster (ACO3627) – II. The near-infrared Ks
... seem to have a steeper bright end than those without cD galaxies. Often the brightest galaxy is excluded to obtain a better fit, particularly in cD clusters. The Schechter parameters have also been found to vary depending on the region sampled within the cluster, the size of the area and the limitin ...
... seem to have a steeper bright end than those without cD galaxies. Often the brightest galaxy is excluded to obtain a better fit, particularly in cD clusters. The Schechter parameters have also been found to vary depending on the region sampled within the cluster, the size of the area and the limitin ...
Astrophysical explosions: from solar flares to cosmic gamma
... detonations have informed the study of astrophysical detonations, and examining the possibility of unconfined DDTs in astrophysical combustion has led to the search for general mechanisms of DDT. DDT is thought to be involved in the thermonuclear explosions of stars that produce type Ia supernovae. T ...
... detonations have informed the study of astrophysical detonations, and examining the possibility of unconfined DDTs in astrophysical combustion has led to the search for general mechanisms of DDT. DDT is thought to be involved in the thermonuclear explosions of stars that produce type Ia supernovae. T ...
A re-appraisal of the habitability of planets around M dwarf
... power source. These same named luminosity classes are also numbered for abbreviation; I, II, III, IV, and V runs from supergiant to dwarf. Our own Sun is spectral type G2 and luminosity class V (or dwarf). Less massive dwarf stars are cool, such as M dwarfs. The length of time a particular star rema ...
... power source. These same named luminosity classes are also numbered for abbreviation; I, II, III, IV, and V runs from supergiant to dwarf. Our own Sun is spectral type G2 and luminosity class V (or dwarf). Less massive dwarf stars are cool, such as M dwarfs. The length of time a particular star rema ...
A Reappraisal of The Habitability of Planets around M Dwarf Stars
... power source. These same named luminosity classes are also numbered for abbreviation; I, II, III, IV, and V runs from supergiant to dwarf. Our own Sun is spectral type G2 and luminosity class V (or dwarf). Less massive dwarf stars are cool, such as M dwarfs. The length of time a particular star rema ...
... power source. These same named luminosity classes are also numbered for abbreviation; I, II, III, IV, and V runs from supergiant to dwarf. Our own Sun is spectral type G2 and luminosity class V (or dwarf). Less massive dwarf stars are cool, such as M dwarfs. The length of time a particular star rema ...
Lithium abundances along the red giant branch: FLAMES
... these stars. As it is unlikely that they skipped Li destruction at FDU, they must have somehow replenished it through Be decay (see the discussion in Palmerini et al. 2011). While the Li abundance has been measured already in an increasing number of field stars (e.g. Mallik 1999; Kumar et al. 2011; ...
... these stars. As it is unlikely that they skipped Li destruction at FDU, they must have somehow replenished it through Be decay (see the discussion in Palmerini et al. 2011). While the Li abundance has been measured already in an increasing number of field stars (e.g. Mallik 1999; Kumar et al. 2011; ...
Neutron Star and Superfluidity
... neutron drip where high momentum electrons are captured by proton to form neutron with emission of neutrino will occur. With more and more neutrons present, eventually extra neutrons must go to continuum states as all bound states are filled up. Degenerate neutron fermi sea will now form. Neutrons in ...
... neutron drip where high momentum electrons are captured by proton to form neutron with emission of neutrino will occur. With more and more neutrons present, eventually extra neutrons must go to continuum states as all bound states are filled up. Degenerate neutron fermi sea will now form. Neutrons in ...
Course Materials - Weber State University
... 1. Write down on your worksheet your prediction for the cause of the seasons. Do not worry if you are not sure---that's the point of this exercise! Just write something reasonable down. This is your working model of the 'reason for the seasons'. 2. Now, answer the following questions about YOUR mode ...
... 1. Write down on your worksheet your prediction for the cause of the seasons. Do not worry if you are not sure---that's the point of this exercise! Just write something reasonable down. This is your working model of the 'reason for the seasons'. 2. Now, answer the following questions about YOUR mode ...
Abstract book
... Title: Asymptotic Giant Branch stars in intermediate age clusters Abstract. Spectroscopic and photometric observations of AGB stars belonging to intermediate age clusters (1 to 3 Gyrs) represent one of the most challenging test for the theory of AGB evolution and nucleosynthesis. Their masses (1.3 t ...
... Title: Asymptotic Giant Branch stars in intermediate age clusters Abstract. Spectroscopic and photometric observations of AGB stars belonging to intermediate age clusters (1 to 3 Gyrs) represent one of the most challenging test for the theory of AGB evolution and nucleosynthesis. Their masses (1.3 t ...
Rotation Periods of Wide Binaries in the Kepler Field
... motions. The Tycho proper motions are presumably the most reliable, so if there are Tycho values for a star, I chose to use them, including the published Tycho uncertainties. For the fainter stars, I took the mean of the available proper motion values, giving double weight to the Deacon catalog, bec ...
... motions. The Tycho proper motions are presumably the most reliable, so if there are Tycho values for a star, I chose to use them, including the published Tycho uncertainties. For the fainter stars, I took the mean of the available proper motion values, giving double weight to the Deacon catalog, bec ...
Discovery of extremely lead-rich subdwarfs: does heavy metal signal
... 1 I N T RO D U C T I O N The formation of hot subdwarf B (sdB) stars remains a puzzle; they are observed as single stars, and as both close and wide binaries. They are widely regarded to be core-helium burners; the majority have hydrogen-rich atmospheres, but this is only a thin veneer, since they b ...
... 1 I N T RO D U C T I O N The formation of hot subdwarf B (sdB) stars remains a puzzle; they are observed as single stars, and as both close and wide binaries. They are widely regarded to be core-helium burners; the majority have hydrogen-rich atmospheres, but this is only a thin veneer, since they b ...
Astronomy
... • Some oceans are 25-30 degrees celsius all year round • Greenhouse effect also counters this ...
... • Some oceans are 25-30 degrees celsius all year round • Greenhouse effect also counters this ...
WAS THE SUN BORN IN A MASSIVE CLUSTER?
... A number of authors have argued that the Sun must have been born in a cluster of no more than several thousand stars, on the basis that, in a larger cluster, close encounters between the Sun and other stars would have truncated the outer solar system or excited the outer planets into eccentric orbit ...
... A number of authors have argued that the Sun must have been born in a cluster of no more than several thousand stars, on the basis that, in a larger cluster, close encounters between the Sun and other stars would have truncated the outer solar system or excited the outer planets into eccentric orbit ...
http://www.highpoint.edu/~afuller/PHY-1050
... ejects the H and He into space as a planetary nebula. • The core left behind becomes a white dwarf. • Despite the name, this phenomenon has nothing immediate to do with planets ...
... ejects the H and He into space as a planetary nebula. • The core left behind becomes a white dwarf. • Despite the name, this phenomenon has nothing immediate to do with planets ...
Complete Lecture Notes (pdf file)
... • relation between astronomical observables (flux, spectrum, parallax, radial velocities) and physical properties (luminosity, temperature, radius, mass, composition) • the stellar magnitude system (apparent and absolute magnitudes, bolometric magnitude, bolometric correction, distance modulus), the ...
... • relation between astronomical observables (flux, spectrum, parallax, radial velocities) and physical properties (luminosity, temperature, radius, mass, composition) • the stellar magnitude system (apparent and absolute magnitudes, bolometric magnitude, bolometric correction, distance modulus), the ...
Finnish Centre for Astronomy with ESO
... cosmology, active galaxies, and galaxy formation and evolution, through properties of nearby galaxies, to supernovae and their progenitor stars, stellar magnetic activity, star formation and exoplanets in our own Galaxy. In our research, we use radio to gamma-rays multi-wavelength observational data ...
... cosmology, active galaxies, and galaxy formation and evolution, through properties of nearby galaxies, to supernovae and their progenitor stars, stellar magnetic activity, star formation and exoplanets in our own Galaxy. In our research, we use radio to gamma-rays multi-wavelength observational data ...
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.