Untitled - METU Astrophysics Home Page
... radio pulsations from outside the solar system which later was understood to be the first detection of a pulsar by the humankind. Following this ground breaking discovery, tens of other pulsating radio sources were found across the sky without much delay, with the efforts of astronomers from all arou ...
... radio pulsations from outside the solar system which later was understood to be the first detection of a pulsar by the humankind. Following this ground breaking discovery, tens of other pulsating radio sources were found across the sky without much delay, with the efforts of astronomers from all arou ...
Current Status of Nuclear Physics Research
... without Astronomy and the benefits its observations have brought to such mundane things as the human sense of time, distance and motion, through navigation, and the discoveries of new worlds on Earth and in the skies. The symbiosis between nuclear physics and astronomical observations has skyrockete ...
... without Astronomy and the benefits its observations have brought to such mundane things as the human sense of time, distance and motion, through navigation, and the discoveries of new worlds on Earth and in the skies. The symbiosis between nuclear physics and astronomical observations has skyrockete ...
WSokolov-PROTVINO
... include HST ACS, NICMOS, and FC3/IR, groundbased K, and IRAC [3.6] and [4.5]. The best-fit BC03 stellar population models at z = 6.9 are shown. The overall SED shapes are remarkably similar, with a Balmer break between H160 and [3.6], indicative of evolved stellar populations (> 100Myr). The far−UV ...
... include HST ACS, NICMOS, and FC3/IR, groundbased K, and IRAC [3.6] and [4.5]. The best-fit BC03 stellar population models at z = 6.9 are shown. The overall SED shapes are remarkably similar, with a Balmer break between H160 and [3.6], indicative of evolved stellar populations (> 100Myr). The far−UV ...
disks surviving the radiation pressure of radio pulsars
... inclination angles. The mass flow rate in quiescent phases of accretion-driven millisecond pulsars can occasionally drop to values low enough that the inner radius of the disk goes beyond the light cylinder. The possibilities considered here may be relevant for the evolution of spun-up X-ray binarie ...
... inclination angles. The mass flow rate in quiescent phases of accretion-driven millisecond pulsars can occasionally drop to values low enough that the inner radius of the disk goes beyond the light cylinder. The possibilities considered here may be relevant for the evolution of spun-up X-ray binarie ...
Accreting magnetars: a new type of high-mass X-ray binaries? P. Reig,
... The discovery of very slow pulsations (Pspin = 5560 s) has solved the long-standing question of the nature of the compact object in the high-mass X-ray binary 4U 2206+54 but has posed new ones. According to spin evolutionary models in close binary systems, such slow pulsations require a neutron star ...
... The discovery of very slow pulsations (Pspin = 5560 s) has solved the long-standing question of the nature of the compact object in the high-mass X-ray binary 4U 2206+54 but has posed new ones. According to spin evolutionary models in close binary systems, such slow pulsations require a neutron star ...
Chapter 2 Mass Transfer in Binary Systems
... These sources with supersoft X-ray radiation (emission dominantly below 0.5 keV which corresponds to effective temperatures 50 eV),and bolometric luminosities in the range erg/s. It is widely believed that most of the supersoft X-ray sources are accreting white dwarfs in binary systems ...
... These sources with supersoft X-ray radiation (emission dominantly below 0.5 keV which corresponds to effective temperatures 50 eV),and bolometric luminosities in the range erg/s. It is widely believed that most of the supersoft X-ray sources are accreting white dwarfs in binary systems ...
The rebirth of Supernova 1987A a study of the ejecta-ring collision
... At this mass, electron degeneracy pressure can no longer withstand the gravitational forces and, as a consequence, the iron core starts to contract. Due to electron captures in the iron core, e− + p → n + νe , the number of electrons decreases and the pressure reduces accordingly. Furthermore, energ ...
... At this mass, electron degeneracy pressure can no longer withstand the gravitational forces and, as a consequence, the iron core starts to contract. Due to electron captures in the iron core, e− + p → n + νe , the number of electrons decreases and the pressure reduces accordingly. Furthermore, energ ...
bob_neutrino_EPS04
... problem. Neutrino interactions with matter are usually considered as non self-consistent single particle processes. We describe neutrino streaming instabilities within supernovæ plasmas, resulting in longitudinal and transverse waves using coupled kinetic equations for both neutrinos and plasma part ...
... problem. Neutrino interactions with matter are usually considered as non self-consistent single particle processes. We describe neutrino streaming instabilities within supernovæ plasmas, resulting in longitudinal and transverse waves using coupled kinetic equations for both neutrinos and plasma part ...
The Central Star Candidate of the Planetary Nebula Sh2
... placed between two and three FWHM from the stellar centres. This photometric configuration was found to maximize the signal to noise ratios of the differential magnitudes. We were only able to measure the differential photometry for CS1; CS2 was too faint to be detectable in the FTS and LT datasets ...
... placed between two and three FWHM from the stellar centres. This photometric configuration was found to maximize the signal to noise ratios of the differential magnitudes. We were only able to measure the differential photometry for CS1; CS2 was too faint to be detectable in the FTS and LT datasets ...
Boron Abundances Across the" Li
... below the SCZ. The more observational information we have for all three light elements, the better we will be able to understand the internal mixing processes and then build more sophisticated stellar evolution models. Studies of Li abundances in clusters younger than the Hyades, such as Pleiades an ...
... below the SCZ. The more observational information we have for all three light elements, the better we will be able to understand the internal mixing processes and then build more sophisticated stellar evolution models. Studies of Li abundances in clusters younger than the Hyades, such as Pleiades an ...
Resources: - Real Science
... extending theories that explain other neutron stars: The magnetic fields inside the neutron star are probably wound up, like a twisted spring. As the magnetic fields unwind they create stresses in the outer crust, rather like the stresses created by plate tectonics on Earth. The crust would resist t ...
... extending theories that explain other neutron stars: The magnetic fields inside the neutron star are probably wound up, like a twisted spring. As the magnetic fields unwind they create stresses in the outer crust, rather like the stresses created by plate tectonics on Earth. The crust would resist t ...
Does feedback help or hinder star formation? The effect of
... After the accretion has finished, the star particles emit ionising radiation using the adaptive ray tracing scheme implemented in Enzo that is described in Abel & Wandelt (2002); Wise & Abel (2011) and based on the HEALPix framework (Górski et al. 2005). Each star particle has an ionising luminosit ...
... After the accretion has finished, the star particles emit ionising radiation using the adaptive ray tracing scheme implemented in Enzo that is described in Abel & Wandelt (2002); Wise & Abel (2011) and based on the HEALPix framework (Górski et al. 2005). Each star particle has an ionising luminosit ...
Tracing the evolution of NGC 6397 through the chemical
... many clusters (D’Antona & Caloi 2008). We are, however, far from building a fully consistent picture of the chemical evolution of globular clusters that can explain all the various observations simultaneously. A key unknown is the nature of the polluting objects. One possibility is that so-called ho ...
... many clusters (D’Antona & Caloi 2008). We are, however, far from building a fully consistent picture of the chemical evolution of globular clusters that can explain all the various observations simultaneously. A key unknown is the nature of the polluting objects. One possibility is that so-called ho ...
White dwarfmain sequence binaries identified within SDSS DR7 and
... Gómez-Morán & Schwope (2007) also developed special colourcuts to select old WDMS systems from the Sloan Extension for Galactic Understanding and Exploration (SEGUE), but they did not consider the fact that the colours change with different surface gravities of white dwarfs and metallicities of co ...
... Gómez-Morán & Schwope (2007) also developed special colourcuts to select old WDMS systems from the Sloan Extension for Galactic Understanding and Exploration (SEGUE), but they did not consider the fact that the colours change with different surface gravities of white dwarfs and metallicities of co ...
Merger of binary neutron stars with realistic equations of state in full
... realistic equations of state are quite different from those in the -law equation of state with 2 (hereafter referred to as the 2 equation of state) which has been widely adopted so far (e.g., [12]).1 It can be expected that these differences will modify the properties of the merger quantita ...
... realistic equations of state are quite different from those in the -law equation of state with 2 (hereafter referred to as the 2 equation of state) which has been widely adopted so far (e.g., [12]).1 It can be expected that these differences will modify the properties of the merger quantita ...
Slide 1
... Collimated emission (geometrical collimation – King et 2001, King 2008; relativistic boosting – Freeland et al. 2003) super- or critical Eddington accretion onto a stellar mass BH (e.g. Mizuno et al. 2001, Vierdayanti et al. 2006, Feng & Kaaret 2007, Kajava & Poutanen 2008, King 2009, Zampieri & ...
... Collimated emission (geometrical collimation – King et 2001, King 2008; relativistic boosting – Freeland et al. 2003) super- or critical Eddington accretion onto a stellar mass BH (e.g. Mizuno et al. 2001, Vierdayanti et al. 2006, Feng & Kaaret 2007, Kajava & Poutanen 2008, King 2009, Zampieri & ...
Effects of color superconductivity on the nucleation of quark matter in
... However, quantum fluctuations can form the so called Q*phase bubbles, in which the flavor content of the quark phase is equal to that of the β-stable hadronic system at the same pressure. Since no flavor conversion is involved, there are no suppressing Fermi factors, and a Q*-phase drop can be nucle ...
... However, quantum fluctuations can form the so called Q*phase bubbles, in which the flavor content of the quark phase is equal to that of the β-stable hadronic system at the same pressure. Since no flavor conversion is involved, there are no suppressing Fermi factors, and a Q*-phase drop can be nucle ...
Potassium abundances in nearby metal-poor stars
... for warm subgiant stars is similar to the sodium NLTE studies (eg. Shi et al. 2004). As expected, stronger departures from LTE are found for stars with high temperature, which is in agreement with the statistical equilibrium of sodium, magnesium and aluminium (Gehren et al. 2004, 2006). The reductio ...
... for warm subgiant stars is similar to the sodium NLTE studies (eg. Shi et al. 2004). As expected, stronger departures from LTE are found for stars with high temperature, which is in agreement with the statistical equilibrium of sodium, magnesium and aluminium (Gehren et al. 2004, 2006). The reductio ...
P-nuclei
p-Nuclei (p stands for proton-rich) are certain proton-rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s- or r-process.