stochastic star formation and a (nearly) uniform stellar
... selected from an IMF φ(m) = m−γ over some specified mass interval. Currently, all the stars within a cluster are assumed to be coeval. The remaining fraction 1 − fc of the total stellar population are formed in the field, simulated by randomly selecting stars from an IMF. The ensemble of clusters an ...
... selected from an IMF φ(m) = m−γ over some specified mass interval. Currently, all the stars within a cluster are assumed to be coeval. The remaining fraction 1 − fc of the total stellar population are formed in the field, simulated by randomly selecting stars from an IMF. The ensemble of clusters an ...
RESEARCH STATEMENT Chromospheres and winds
... been observed in the optical using ground–based instruments [2] and in the ultraviolet using the International Ultraviolet Explorer (IUE) [3]. ζ Aurigae has been observed at the Dominion Astronomical Observatory (DAO) over many eclipse cycles with the 1.2 m telescope. The chromospheric Ca ii K absor ...
... been observed in the optical using ground–based instruments [2] and in the ultraviolet using the International Ultraviolet Explorer (IUE) [3]. ζ Aurigae has been observed at the Dominion Astronomical Observatory (DAO) over many eclipse cycles with the 1.2 m telescope. The chromospheric Ca ii K absor ...
Boron Abundances Across the" Li
... neault et al. 2004, which are specific to the Hyades. We use values of v sin i primarily from Mermilliod et al. (2009), but also from Paulson et al. (2003), Reiners & Schmidt (2003), and Kraft (1965) for the Hyades. We adopt [Fe/H] = 0.13, as discussed in the introduction. In Table 3 we list the val ...
... neault et al. 2004, which are specific to the Hyades. We use values of v sin i primarily from Mermilliod et al. (2009), but also from Paulson et al. (2003), Reiners & Schmidt (2003), and Kraft (1965) for the Hyades. We adopt [Fe/H] = 0.13, as discussed in the introduction. In Table 3 we list the val ...
Astronomy Astrophysics The accretion environment in Vela X-1 during a flaring period using
... kilo-seconds down to fractions of the pulse period. We have not undertaken a detailed analysis of the timing behaviour on time scales below the pulse period. A corresponding study is under way and will be published separately. In this work a mostly stable pulse period of 283.389 ± 0.004 s is found. ...
... kilo-seconds down to fractions of the pulse period. We have not undertaken a detailed analysis of the timing behaviour on time scales below the pulse period. A corresponding study is under way and will be published separately. In this work a mostly stable pulse period of 283.389 ± 0.004 s is found. ...
The 2dF QSO Redshift Survey
... Understanding QSOs: summary of evidence so far… Locally: QSOs cluster like average galaxies z~2: higher clustering amplitude + MUCH more luminous / numerous Little correlation between luminosity / clustering amplitude QSOs seen out to z>6 LF well described by PLE QSO BH mass as z ? BHs seen in ...
... Understanding QSOs: summary of evidence so far… Locally: QSOs cluster like average galaxies z~2: higher clustering amplitude + MUCH more luminous / numerous Little correlation between luminosity / clustering amplitude QSOs seen out to z>6 LF well described by PLE QSO BH mass as z ? BHs seen in ...
- EPJ Web of Conferences
... atmosphere of Titan shed new lights on the chemistry of astrophysical environments. The variety, complexity and sometimes exoticism of the molecules presently discovered in extraterrestrial environments arouse a lot of interrogations in the scientific community. Among them the identification of the ...
... atmosphere of Titan shed new lights on the chemistry of astrophysical environments. The variety, complexity and sometimes exoticism of the molecules presently discovered in extraterrestrial environments arouse a lot of interrogations in the scientific community. Among them the identification of the ...
Mapping the Dark Matter
... over spectral range Broad spectral shape also contains information Compare spectra from synthetic stellar population models with observed spectra ...
... over spectral range Broad spectral shape also contains information Compare spectra from synthetic stellar population models with observed spectra ...
New experimental sublimation energy measurements for some
... (40 K), thermally connected to a shield protector acts as a cryopump providing a base pressure below 10−7 mbar (HV conditions) measured with an ITR IoniVac transmiter (5% in accuracy). The pressure of gases is monitored by means of the QMS (AccuQuad RGA 100 with a resolution of ∼0.5 amu and an ioniz ...
... (40 K), thermally connected to a shield protector acts as a cryopump providing a base pressure below 10−7 mbar (HV conditions) measured with an ITR IoniVac transmiter (5% in accuracy). The pressure of gases is monitored by means of the QMS (AccuQuad RGA 100 with a resolution of ∼0.5 amu and an ioniz ...
Tracing the evolution of NGC 6397 through the chemical
... Methods. High-resolution spectra were obtained with the FLAMES/UVES spectrograph on the VLT. We determined non-LTE abundances of Na, and LTE abundances for the remaining 21 elements, including O (from the [OI] line at 630 nm), Mg, Al, α, iron-peak, and neutron-capture elements, many of which had not ...
... Methods. High-resolution spectra were obtained with the FLAMES/UVES spectrograph on the VLT. We determined non-LTE abundances of Na, and LTE abundances for the remaining 21 elements, including O (from the [OI] line at 630 nm), Mg, Al, α, iron-peak, and neutron-capture elements, many of which had not ...
0004-637X 778 2 119
... assume that the source is in the accretion phase and take rin = rA . It is implicitly assumed that the boundary layer of the disk could extend down to the co-rotation radius, while rin represents the inner radius of the thin disk or the outer radius of the boundary layer. For the accretion phase, fr ...
... assume that the source is in the accretion phase and take rin = rA . It is implicitly assumed that the boundary layer of the disk could extend down to the co-rotation radius, while rin represents the inner radius of the thin disk or the outer radius of the boundary layer. For the accretion phase, fr ...
Light and Telescopes Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015
... 3) If you were constructing a scale model of the solar system that used a Sun that was the size of a basketball (approximately 12 inches in diameter), which of the following lengths would most closely approximate the scaled distance between Earth and the Sun? a) 3 feet (length of an outstretched arm ...
... 3) If you were constructing a scale model of the solar system that used a Sun that was the size of a basketball (approximately 12 inches in diameter), which of the following lengths would most closely approximate the scaled distance between Earth and the Sun? a) 3 feet (length of an outstretched arm ...
Magnetic Doppler imaging of the roAp star HD 24712⋆
... the 2.56 m Nordic Optical Telescope (NOT), La Palma, Spain. The spectrograph is equipped with three different cameras, and to obtain observations in the spectropolarimetric mode, the second camera was used. For MDI we used 49 different spectral lines from seven spectral orders, each covering about 4 ...
... the 2.56 m Nordic Optical Telescope (NOT), La Palma, Spain. The spectrograph is equipped with three different cameras, and to obtain observations in the spectropolarimetric mode, the second camera was used. For MDI we used 49 different spectral lines from seven spectral orders, each covering about 4 ...