The Milky Way and Its Neighbors
... 2)Mapping HII regions via Hα emission lines - HII regions trace active star formation Old data showed that there were 4 arms New data from Spitzer indicates that there are only 2 major spiral arms: -Scutum and Perseus Arms ...
... 2)Mapping HII regions via Hα emission lines - HII regions trace active star formation Old data showed that there were 4 arms New data from Spitzer indicates that there are only 2 major spiral arms: -Scutum and Perseus Arms ...
Dynamic
... Within the framework of general relativity, dynamic stabilization against collapse by non-linear non-spherical oscillations cannot be universal. When the size of the body approaches gravitational radius, no stabilization is possible at any γ . Nevertheless, the nonlinear stabilization may occur at ...
... Within the framework of general relativity, dynamic stabilization against collapse by non-linear non-spherical oscillations cannot be universal. When the size of the body approaches gravitational radius, no stabilization is possible at any γ . Nevertheless, the nonlinear stabilization may occur at ...
A Tidal Disruption Event Candidate from the 2XMM Catalog
... BH Xray binaries in the thermal state but for a SMBH; Large variability on timescales of hours are seen, probably due to fast variations in the mass accretion rate caused by shocks during tidal disruption of the star. Acknowledgement: This work is supported by the Chandra ...
... BH Xray binaries in the thermal state but for a SMBH; Large variability on timescales of hours are seen, probably due to fast variations in the mass accretion rate caused by shocks during tidal disruption of the star. Acknowledgement: This work is supported by the Chandra ...
Slide 1 - Arif Solmaz
... • Its visible partner is about 25 solar masses. • The system’s total mass is about 35 solar masses, so the X-ray source must be about ...
... • Its visible partner is about 25 solar masses. • The system’s total mass is about 35 solar masses, so the X-ray source must be about ...
SylTerNav\4Curr\emet
... prove that altitude of the elevated pole is equal to the observer's latitude; define the observer's upper and lower celestial meridian; trace the apparent daily path of all bodies; define true altitude, azimuth and true zenith distance; discuss rising and setting points and define amplitude; explain ...
... prove that altitude of the elevated pole is equal to the observer's latitude; define the observer's upper and lower celestial meridian; trace the apparent daily path of all bodies; define true altitude, azimuth and true zenith distance; discuss rising and setting points and define amplitude; explain ...
PDF
... like greased lightening for the kill - but only if the opponent refuses to back down, and really seems to want to fight. Even when they are angry, they are fair, and will avoid a confrontation if they can find another way of dealing with a tricky situation. Dolphins are far more interested in love t ...
... like greased lightening for the kill - but only if the opponent refuses to back down, and really seems to want to fight. Even when they are angry, they are fair, and will avoid a confrontation if they can find another way of dealing with a tricky situation. Dolphins are far more interested in love t ...
Impact on stellar properties of changing physics SAC Summer
... K. Then the entire core will begin to fuse helium to carbon via the triple-alpha process. The resulting energy release occurs almost explosively. However, most of the energy is absorbed by the overlying layers of the envelope, which in the end causes some mass loss. This short-lived phase of evoluti ...
... K. Then the entire core will begin to fuse helium to carbon via the triple-alpha process. The resulting energy release occurs almost explosively. However, most of the energy is absorbed by the overlying layers of the envelope, which in the end causes some mass loss. This short-lived phase of evoluti ...
Extrasolar Planets - University of Maryland Astronomy
... Doppler shifts, but these only tell us the component of the stellar motion towards or away from us. If we had sufficiently good information about the apparent location of the star, we could see it moving in tiny circles on the sky. Indeed, this was how the very dim companion to Sirius (the brightest ...
... Doppler shifts, but these only tell us the component of the stellar motion towards or away from us. If we had sufficiently good information about the apparent location of the star, we could see it moving in tiny circles on the sky. Indeed, this was how the very dim companion to Sirius (the brightest ...
Broad Relativistic Iron Lines from Neutron Star LMXBs
... (4) observer’s inclination angle w.r.t. NS spin axis: i; (5) beaming (due to NS atmosphere) parameter: n [specific intensity as a function of angle (in emitter’s frame) from surface normal is given by I() cosn() ]; (6) background. ...
... (4) observer’s inclination angle w.r.t. NS spin axis: i; (5) beaming (due to NS atmosphere) parameter: n [specific intensity as a function of angle (in emitter’s frame) from surface normal is given by I() cosn() ]; (6) background. ...
Brown Dwarfs and M Dwarfs
... Allard, Hauschildt, Tsuji, etc. • Major issues include: completeness of molecular opacities, convection (ML or 3D hydro), dust formation and opacity, initial conditions for young (t
... Allard, Hauschildt, Tsuji, etc. • Major issues include: completeness of molecular opacities, convection (ML or 3D hydro), dust formation and opacity, initial conditions for young (t
project.generative.interactive.music
... Ganymede [GAN-ee-meed] is the largest moon of Jupiter and is the largest in our solar system with a diameter of 5,262 km (3,280 miles). If Ganymede orbited the Sun instead of Jupiter it could be classified as a planet. Like Callisto, Ganymede is most likely composed of a rocky core with a water/ice ...
... Ganymede [GAN-ee-meed] is the largest moon of Jupiter and is the largest in our solar system with a diameter of 5,262 km (3,280 miles). If Ganymede orbited the Sun instead of Jupiter it could be classified as a planet. Like Callisto, Ganymede is most likely composed of a rocky core with a water/ice ...
Draft Science Cases for KPAO
... and the size of the subapertures. For a given system, the guide star magnitude determines the sky coverage and the achievable image quality. The promise of LGS is to increase (shift) the sensitivity of a given AO system with respect to NGS by (roughly) (D/d)2 (where D is the telescope diameter and d ...
... and the size of the subapertures. For a given system, the guide star magnitude determines the sky coverage and the achievable image quality. The promise of LGS is to increase (shift) the sensitivity of a given AO system with respect to NGS by (roughly) (D/d)2 (where D is the telescope diameter and d ...
Structure of Neutron Stars
... Study of close binary systems gives an opportunity to obtain mass estimate for progenitors of NSs (see for example, Ergma, van den Heuvel 1998 A&A 331, L29). For example, an interesting estimate was obtained for GX 301-2. The progenitor mass is >50 solar masses. On the other hand, for several other ...
... Study of close binary systems gives an opportunity to obtain mass estimate for progenitors of NSs (see for example, Ergma, van den Heuvel 1998 A&A 331, L29). For example, an interesting estimate was obtained for GX 301-2. The progenitor mass is >50 solar masses. On the other hand, for several other ...
Properties of Ellipticals and Spirals
... Velocity dispersions are responsible for the overall shape of galaxies. Oblate and Prolate Ellipticals – how that? Spiral: Velocities of stars in spirals are more ordered. Stars rotate around the galactic center in a disk surrounding it – Halo is random. Spiral galaxies are flattened by rotation (el ...
... Velocity dispersions are responsible for the overall shape of galaxies. Oblate and Prolate Ellipticals – how that? Spiral: Velocities of stars in spirals are more ordered. Stars rotate around the galactic center in a disk surrounding it – Halo is random. Spiral galaxies are flattened by rotation (el ...
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.