منابع مشابه
10 μm interferometry of disks around young stars
This contribution reviews results from interferometric observations of circumstellar disks around young stars of .3 M , performed with the MIDI instrument operating in the 10 μm spectral region. Two main topics, the disk structure on ∼1-10 AU scales and the dust properties in the same region, are illustrated with several examples of MIDI studies, covering various evolutionary stages. The spatia...
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Anewmetallicity scale (accurate towithin±0.3 dex) for old stellar systems is derived and discussed. It is particularly useful in cool objectswith [Fe/H]>∼–1.3 and is based onmedium resolution (R∼ 2000) near infrared spectra of a deep and relatively isolated feature at 1.62 μm which is mostly due to the CO(6,3) second overtone band–head. The value of [Fe/H] can be determined using handy interpol...
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We present simulations of the interferometric visibilities of Herbig Ae star disks. We investigate whether interferometric measurements in the 10μm atmospheric window are sensitive to the presence of an increased scale height at the inner disk edge, predicted by recent models. Furthermore, we investigate whether such measurements can discriminate between disks with a “flaring” geometry and disk...
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We report direct absorption spectroscopic detection of ozone at ambient pressure with a pulsed, DFB quantumcascade laser (QCL) tuned within 1044–1050 cm−1 by temperature scanning. Wavelength calibration curves were derived from FTIR and CO2 spectra and interpreted with respect to the heat transfer from the heterostructure to the sink. The laser linewidth (∼ 0.13 cm−1 FWHM) was found to decrease...
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Background and Objective: This study was conducted to investigate the long-term temporal trends and spatial variations of ambient PM10, PM2.5, O3, concentrations in Tabriz city during the years 2006-2017. Materials and Methods: Real-time hourly concentrations of PM10, PM2.5, O3 measured at nine air quality monitoring stations (AQMSs) were obtained from the Tabriz Department of Environment (TDo...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Atmospheres
سال: 2003
ISSN: 0148-0227
DOI: 10.1029/2002jd002755