Structure of the hot object in the symbiotic prototype Z And during its
... UV continuum with an additional attenuation below 1300 Å accompanied by a decline in the radio flux during the 1985 optical maximum. In the line spectrum they measured a broadening of all emission lines with signatures of P-Cygni type profiles for strong resonance lines. Fernández-Castro et al. (19 ...
... UV continuum with an additional attenuation below 1300 Å accompanied by a decline in the radio flux during the 1985 optical maximum. In the line spectrum they measured a broadening of all emission lines with signatures of P-Cygni type profiles for strong resonance lines. Fernández-Castro et al. (19 ...
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... cooler white dwarf sample of Bergeron, Saffer & Liebert (1992), then the hydrogen layer mass must be considerably less than 1 0 - 4 M * . In this context, Mh < 1 0 - 6 M * suffices, and this is not surprising, given that the two major channels of spectral evolution will have DA stars through the 30 ...
... cooler white dwarf sample of Bergeron, Saffer & Liebert (1992), then the hydrogen layer mass must be considerably less than 1 0 - 4 M * . In this context, Mh < 1 0 - 6 M * suffices, and this is not surprising, given that the two major channels of spectral evolution will have DA stars through the 30 ...
STELLAR MASSES AND STAR FORMATION RATES OF LENSED DUSTY STAR-FORMING... FROM THE SPT SURVEY
... a population of high-redshift dusty star-forming galaxies (DSFGs) has been established, expanding our understanding of galaxy formation and evolution. These massive galaxies (M∗ ∼ 1011 M⊙ ; Hainline et al. 2011; Michalowski et al. 2012; Simpson et al. 2014) are extremely bright at submillimeter wave ...
... a population of high-redshift dusty star-forming galaxies (DSFGs) has been established, expanding our understanding of galaxy formation and evolution. These massive galaxies (M∗ ∼ 1011 M⊙ ; Hainline et al. 2011; Michalowski et al. 2012; Simpson et al. 2014) are extremely bright at submillimeter wave ...
A model of slingshot prominences in rapidly rotating stars
... slingshot prominences have been observed is AB Dor. Collier Cameron et al. (1990) derived a mass of 2±6 1017 g; a projected area of 1022 cm2 and a lifetime of a few days for clouds on this star. Stellar slingshot prominences are not peculiar to particular stars but rather a very common property in ...
... slingshot prominences have been observed is AB Dor. Collier Cameron et al. (1990) derived a mass of 2±6 1017 g; a projected area of 1022 cm2 and a lifetime of a few days for clouds on this star. Stellar slingshot prominences are not peculiar to particular stars but rather a very common property in ...
- UCL Discovery
... Pelupessy, van der Werf & Icke 2004). The thermal energy of the feedback particles is calculated with the SPH scheme with radiative cooling and additional heating from stellar wind, SNe II and SNe Ia. Eight out of the 19 feedback particles spend no time being stars and immediately become SNe II feed ...
... Pelupessy, van der Werf & Icke 2004). The thermal energy of the feedback particles is calculated with the SPH scheme with radiative cooling and additional heating from stellar wind, SNe II and SNe Ia. Eight out of the 19 feedback particles spend no time being stars and immediately become SNe II feed ...
Modelling the Ultra-Faint Dwarf Galaxies and Tidal
... Boo II) have been found to date, in SDSS data covering ~20% of the sky tens more likely remain undiscovered • Properties: Ultra-low luminosities (-3.8 ≥ MV ≥ -7.9) and ...
... Boo II) have been found to date, in SDSS data covering ~20% of the sky tens more likely remain undiscovered • Properties: Ultra-low luminosities (-3.8 ≥ MV ≥ -7.9) and ...
What We Might Learn from Gravitational Waves
... Most promising GW+EM source: Short/hard Gamma-ray burst GRBs definitely exist ~1/day in the Universe GRBs are very bright/relativistic GRBs can be detected “all sky” throughout the Universe GRBs have been observed “nearby” Some long, and some short (2 second divide) ...
... Most promising GW+EM source: Short/hard Gamma-ray burst GRBs definitely exist ~1/day in the Universe GRBs are very bright/relativistic GRBs can be detected “all sky” throughout the Universe GRBs have been observed “nearby” Some long, and some short (2 second divide) ...
Semiar PPT
... 3. The rapid fall off of the early x-ray afterglow suggests that -ray emission is produced by a short lived source; we find that it is most likely SSC at a distance of ~ 1016 cm baryonic jets have a few problems. 4. X-ray lightcurves show flares on time scale of minutes to a day suggesting that t ...
... 3. The rapid fall off of the early x-ray afterglow suggests that -ray emission is produced by a short lived source; we find that it is most likely SSC at a distance of ~ 1016 cm baryonic jets have a few problems. 4. X-ray lightcurves show flares on time scale of minutes to a day suggesting that t ...
6th Grade The Theoretical Beginning of the Universe / Big Bang
... (Some astronomers give a rough estimate that there are 1022 stars, although this is always changing!) ...
... (Some astronomers give a rough estimate that there are 1022 stars, although this is always changing!) ...
Demonstration of multilayer reflective optics at photon energies
... < 3 μ rad RMS figure over the entire 150x150 mm2 substrate surface area and 3.3 Å RMS midand 0.5 Å RMS high spatial frequency roughness. Specular reflectivity data were acquired off of the mirror at beamline ID15A at the European Synchrotron Radiation Facility (ESRF) in a θ − 2θ geometry with a ve ...
... < 3 μ rad RMS figure over the entire 150x150 mm2 substrate surface area and 3.3 Å RMS midand 0.5 Å RMS high spatial frequency roughness. Specular reflectivity data were acquired off of the mirror at beamline ID15A at the European Synchrotron Radiation Facility (ESRF) in a θ − 2θ geometry with a ve ...
EUV and X-ray Spectroscopy of the Active Sun
... flare was carried out using RHESSI, CDS, GOES and TRACE. Evidence for pre-flare heating, explosive and gentle chromospheric evaporation and loop draining were observed in the data. The observations were compared to a 0-D hydrodynamic model, EBTEL, to aid interpretation. This led to the conclusion th ...
... flare was carried out using RHESSI, CDS, GOES and TRACE. Evidence for pre-flare heating, explosive and gentle chromospheric evaporation and loop draining were observed in the data. The observations were compared to a 0-D hydrodynamic model, EBTEL, to aid interpretation. This led to the conclusion th ...
Sources of Stellar Energy and the Theory of the Internal Constitution
... any stars, including even super-giants, the radiant pressure plays no essential part — it is negligible in comparison to the gaseous pressure; (2) inner regions of stars are filled mainly by hydrogen (the average molecular weight is close to 1/2); (3) absorption of light is derived from Thomson disp ...
... any stars, including even super-giants, the radiant pressure plays no essential part — it is negligible in comparison to the gaseous pressure; (2) inner regions of stars are filled mainly by hydrogen (the average molecular weight is close to 1/2); (3) absorption of light is derived from Thomson disp ...
