Accurate Wavelengths of Stellar and Telluric Absorption Lines Near 7000A

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Minimizing Strong Telluric Absorption in Near Infra-red Stellar Spectra

We have obtained high resolution spectra (R ∼ 25000) of an A star over varying airmass to determine the effectiveness of telluric removal in the limit of high signal to noise. The near infra-red line He I at 2.058μm, which is a sensitive indicator of physical conditions in massive stars, supergiants, H II regions and YSOs, resides among pressure broadened telluric absorption from CO2 and water ...

متن کامل

TiO and H2O absorption lines in cool stellar atmospheres

Over the past decade, model atmospheres and synthetic spectra for late-type stars have improved hand-in-hand with higher quality opacities. In 1994, quality lists of transitions of the water vapor molecule based on ab initio molecular calculations became available (Miller et al. 1994; Schryber, Miller, & Tennyson 1995; Jørgensen, Jensen, & Sørensen 1994) which allowed the computation of the fir...

متن کامل

Measuring stellar oscillations using equivalent widths of absorption lines

Kjeldsen et al. (1995) have developed a new technique for measuring stellar oscillations and claimed a detection in the G subgiant η Boo. The technique involves monitoring temperature fluctuations in a star via their effect on the equivalent width of Balmer lines. In this paper we use synthetic stellar spectra to investigate the temperature dependence of the Balmer lines, Ca ii, Fe i, the Mg b ...

متن کامل

Infrared stellar absorption lines around 1.6 μm: a new metallicity scale for old stellar populations

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...

متن کامل

‘Ultimate’ information content in solar and stellar spectra: Photospheric line asymmetries and wavelength shifts

Context. Spectral-line asymmetries (displayed as bisectors) and wavelength shifts are signatures of the hydrodynamics in solar and stellar atmospheres. Theory may precisely predict idealized lines, but accuracies in real observed spectra are limited by blends, few suitable lines, imprecise laboratory wavelengths, and instrumental imperfections. Aims. We extract bisectors and shifts until the ‘u...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Monthly Notices of the Royal Astronomical Society

سال: 1973

ISSN: 0035-8711,1365-2966

DOI: 10.1093/mnras/162.3.255