... hydrogen NLTE atmosphere, (2) a deuterium abundance and thermal broadening parameter consistent with those derived toward ... a pure hydrogen model atmosphere with T = 49,000 K, and = 7.7, as derived by Napiwotzki et al. (1993), (2) a hydrogen column ...
... than about 3000 K effective temperature radiate like a hot blackbody at these long wavelengths, possibly with a very few atomic lines (of Hydrogen, in the A-type stars) or molecular bands (the CO band overtone near 2.25 microns for example, in K-type ...
... The fluxes for nine atomic forbidden and three molecular hydrogen mid-infrared emission lines are also provided, along with upper limits in key lines for infrared-faint targets. ...
... We use the near-infrared BrнЕ hydrogen recombination line as a reference star formation rate (SFR) indicator to test the validity and establish the calibration of the Herschel/PACS 70 нјm emission as a SFR tracer for sub-galactic regions in external ...
... accurate local SFR tracer for the H II knots in NGC 5194, with a peak-to-peak dispersion of less than a factor of 3 relative to hydrogen emission line tracers; this suggests that the 24 ЮМm emission carriers are mainly heated by the young, ionizing stars ...
... to 10000A, the FOS flux spectrum for G191B2B (WD0501+527) is divided by a model spectrum for the case of a pure hydrogen atmosphere to derive the difference between the current HST flux scale and the flux scale defined by the physics of model atmosphere ...