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X-Ray Absorption Line Spectroscopy of the Galactic Hot Interstellar Medium
Cyg X–2 V801 Ara
2014/12/24
We present an X-ray absorption line spectroscopic study of the large-scale hot interstellar medium (HISM) in the Galaxy. We detect Ne IX Kα absorption lines in the Chandra grating spectra of seven Gal...
H$\beta$ Line Widths as an Orientation Indicator for Low-Ionization Broad Absorption Line Quasars
Orientation Indicator Low-Ionization Absorption Line Quasars
2011/1/11
There is evidence from radio-loud quasars to suggest that the distribution of the H$\beta$ broad emission line (BEL) gas is arranged in a predominantly planar orientation, and this result may well als...
The Transition from "Normal" to "Broad Absorption Line Quasar" of Ton 34
Normal Broad Absorption Line Quasar
2011/1/10
We report the emergence of a high velocity, broad absorption line outflow in the luminous quasar Ton 34, at z=1.928. The outflow is detected through an ultraviolet CIV broad absorption line, in a spec...
Flux-calibrated stellar population models of Lick absorption-line indices with variable element abundance ratios
Flux-calibrated stellar population models Lick absorption-line indices
2011/1/10
We present new stellar population models of Lick absorption-line indices with variable element abundance ratios. The models are based on our new calibrations of absorption-line indices with stellar pa...
Absorption Line Profile of the 5S2o-5P1 Transition of Atomic Oxygen and Its Application to Plasma Monitoring
Line Profile Atomic Oxygen 5S2o-5P1 Transition
2009/9/4
The line profile of the 5S2o-5P1 transition of atomic oxygen was measured by diode laser absorption spectroscopy. As a result, it was found that the absorption line profile had a wing component in the...
Absorption line indices for studying stellar populations
Absorption line indices stellar populations
2009/6/18
Absorption line indices for studying stellar populations。
We have imaged a region of ∼5 extent surrounding Sgr A∗
in the HI 21 cm-line absorption using the Very Large Array. A Gaussian
decomposition of the optical depth spectra at positions wi...