Publications of the Astronomical Society of the Pacific, Volume 106, Issues 695-702Astronomical Society of the Pacific, 1994 |
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Page 394
... emission lines indicative of an extended shell or surrounding nebula . Emission - line stars 7,000 NaI and the interstellar 6284 Å lines , but has much weaker Si II features . By contrast the Ha emission is much narrower , and several ...
... emission lines indicative of an extended shell or surrounding nebula . Emission - line stars 7,000 NaI and the interstellar 6284 Å lines , but has much weaker Si II features . By contrast the Ha emission is much narrower , and several ...
Page 861
... emission lines did change during this time . Figure 5 shows the CIV 1550 Å and Si IV 1394 Å emission - line flux from the coadded spectra of each night . These lines were measured by fitting them with a Gaussian profile . Si IV 1394 Å ...
... emission lines did change during this time . Figure 5 shows the CIV 1550 Å and Si IV 1394 Å emission - line flux from the coadded spectra of each night . These lines were measured by fitting them with a Gaussian profile . Si IV 1394 Å ...
Page 863
... emission line so that the He I 4921 Å emission line would not contaminate the fit to the continuum . ) This comparison assumes that the continuum level in the blue had not changed significantly between the two nights . The profile of ...
... emission line so that the He I 4921 Å emission line would not contaminate the fit to the continuum . ) This comparison assumes that the continuum level in the blue had not changed significantly between the two nights . The profile of ...
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absorption abundance accretion analysis asteroids astrometry Astronomical Society binary bright calibration catalog central star chromospheric clouds color comets correction derived detection detector diagram disk distribution eclipse emission errors estimate evolution expansion velocities Fe/H field flux frame function galactic galaxies GCLF giant branch globular clusters H II regions Hyades indices infrared ionized km s¹ light curve lines luminosity magnitude main sequence main-sequence mass measured MNRAS objects observations Observatory obtained open clusters optical orbital parameters PASP period phase photometric pixels planetary nebulae plotted quasars radial velocities radius range ratio red giants reddening redshift region residuals rotation sample scale scatter secondary solar sources spectral type spectroscopic spectrum standard stellar subgiant survey Table telescope temperature tion turnoff values variability wavelength white dwarf width X-ray XX Vir