Publications of the Astronomical Society of the Pacific, Volume 106, Issues 695-702Astronomical Society of the Pacific, 1994 |
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Page 342
... main sequence . Thus , pre - main - sequence stars are relatively rare . Nevertheless , there is no question that this phase has been observed . Pre - main - sequence objects of relatively low mass ( M2 M ) are known as T Tauri stars ...
... main sequence . Thus , pre - main - sequence stars are relatively rare . Nevertheless , there is no question that this phase has been observed . Pre - main - sequence objects of relatively low mass ( M2 M ) are known as T Tauri stars ...
Page 494
... main sequence be- tween V = 17.0 and 18.0 for further analysis , beginning with an inspection of the ( b - y ) and Hẞ values . In this main- sequence region the photometric errors are small and the cmd turnoff is effectively vertical ...
... main sequence be- tween V = 17.0 and 18.0 for further analysis , beginning with an inspection of the ( b - y ) and Hẞ values . In this main- sequence region the photometric errors are small and the cmd turnoff is effectively vertical ...
Page 497
... main - sequence cmd widths of the two clusters . Unlike the case of w Cen ( Mukherjee et al . 1992 ) , the additional information provided by m , indices of the main - sequence stars in Mel 66 indicates substantial chemical homogeneity ...
... main - sequence cmd widths of the two clusters . Unlike the case of w Cen ( Mukherjee et al . 1992 ) , the additional information provided by m , indices of the main - sequence stars in Mel 66 indicates substantial chemical homogeneity ...
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Common terms and phrases
absorption abundance accretion analysis asteroids 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 pixel 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 stellar winds subgiant survey Table telescope temperature tion turnoff values variability wavelength white dwarf width X-ray XX Vir