C&EN Archives
نویسندگان
چکیده
منابع مشابه
The X - Ray Photoionized Wind in Cen X - 3 / V 779 Cen
We analyze the ASCA spectrum of the Cen X-3 X-ray binary system in eclipse using atomic models appropriate to recombination-dominated level population kinetics in an overionized plasma. In order to estimate the wind characteristics, we first fit the eclipse spectrum to a single-zone photoionized plasma model. We then fit spectra from a range of orbital phases using global models of photoionized...
متن کاملThe acoustic spectrum of α Cen A ⋆
This paper presents the analysis of Doppler p-mode observations of the G2V star α Cen A obtained with the spectrograph CORALIE in May 2001. Thirteen nights of observations have made it possible to collect 1850 radial velocity measurements with a standard deviation of about 1.5 m s −1. Twenty-eight oscillation modes have been identified in the power spectrum between 1.8 and 2.9 mHz with amplitud...
متن کاملThe Variable Quiescence of Cen X - 4
Cen X-4 is one of the best studied low-mass neutron star transients in quiescence. Thanks to XMM-Newton large throughput, Cen X-4 was observed at the highest signal to noise ever. This allowed us to disclose rapid (> 100 s), large (45 ± 7 rms in the 10 −4 − 1 Hz range) intensity variability, especially at low energies. In order to highlight the cause of this variability, we divided the data int...
متن کاملP - mode observations on α Cen A ⋆
We have made a clear detection of p-mode oscillations in the nearest solar-like G2V star α Cen A with the CORALIE spectrograph on the 1.2-m Swiss telescope at the ESO La Silla Observatory. We report the 5 nights of observation on this star in May 2001 during which 1260 high precision radial velocity measurements were obtained. The power spectrum clearly shows several identifiable peaks between ...
متن کاملArchives – draft
The email archives that people accumulate are a dense, complex, and highly personal record of their past interactions. As email becomes increasingly ubiquitous, these include not only their work interactions, but also their relationships with family members, friends, doctors, teachers, etc. However, current mail clients do little to support these archives beyond providing a basic filing and sea...
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ژورنال
عنوان ژورنال: Chemical & Engineering News Archive
سال: 2010
ISSN: 0009-2347,2157-4936
DOI: 10.1021/cen-v088n045.p005