The Astrophysical Journal, Volume 24University of Chicago Press, 1906 "Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967. Beginning in 2009, the Letters published only online. |
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Common terms and phrases
absorption band acid amount amperes appear Arcturus Astrophysical Journal atmospheres atoms axis of collineation bright carbonyl group CH HC chromosphere components conjugate corresponding curve determined Doppler effect Double reversal dysprosium eclipse effect elements enhanced lines equations EXNER AND HASCHEK exposure F type faculae faint focal line gadolinium gives HASCHEK REMARKS HC CH hydrogen increase inductance Intensity in Sun investigation isorropesis ketone Latitude light light-curves Longitude Mb type measured mirror Mount Wilson Observatory observed obtained optical oscillation photographs plane field plate polarized position pressure radial velocity radiation rays refraction region residual affinities reversed lines rotation shift shown slit spark spectra spectral lines spectrograph spectroheliograph spectroscopic spherical spot star stellar sun-spots surface tautomerism telescope temperature terbium terbium lines tion vanadium velocity wave-lengths weak arc weakened width Yerkes Observatory ytterbium yttrium ΙΟ
Popular passages
Page 212 - We learn now from the current number of the Astrophysical Journal (vol. xxiv., No. 3, October) that Mr. John D. Hooker, of Los Angeles, who on former occasions has rendered financial assistance...
Page 185 - In considering the characteristic features of the spectra of sun-spots, three points especially attract attention : — 1. The fact that certain lines in the spectrum of a given element are strengthened, while others are weakened ; the remainder of the lines being unaffected. 2. The inclusion of all the strengthened lines within the visible spectrum, none of them occurring in the ultra-violet, and their predominance in the red, yellow, and green. 3. The relatively great intensity of the continuous...
Page 122 - With increase of intensity the line broadens and finally separates into two as the intensity corresponding to the point c is reached. With further increase in intensity the two components continually broaden and separate. At low pressure the minimum width is less and the line twins at a lower intensity. There appears, then, to be little choice between various normal lines so far as minimum width and intensity coefficient are concerned.
Page 206 - ... lines, it is not certain that all of these have abnormal intensities in the flash. There is no evidence of differences in the relative intensities of the lines of an element in the higher or lower regions of the flash layer, and the enhanced lines appear to predominate throughout the entire depth of the radiating stratum.
Page 148 - ... 3 and 5 are brought close together, these residual affinities will produce linkings as shown by the dotted lines. The atoms i and 4, however, are far removed from one another and from the other atoms, and are, therefore, unsaturated. On the other hand, when the ring has passed into the other phase, b, then the three atoms 2, 1 and 6 come very close to the three atoms 3, 4 and 5 respectively, and linking may be considered to be formed between these pairs of atoms. The linkings existing in phases...
Page 207 - The spectrograph used in the work with the Snow telescope has collimating and camera lenses of 5 inches aperture and 13 feet focal length, mounted rigidly, with the slit, grating-mount, and plateholder, on a single massive stone pier.
Page 129 - ... longitude 46° west. She was visited and inspected at Greenport by President Woodward in company with the Director. After an unusually favorable cruise, during which observations of all the elements were possible on all but two days. Vieques was reached on July 24. At this point opportunity was afforded, through the courtesy of Superintendent OH Tittmann, of the United States Coast and Geodetic Survey, to intercompare all of the instruments with the standards of the Vieques Magnetic Observatory....
Page 331 - In this classification the Sun is of type G. The principal result of the comparison is the very strong indication that the physical conditions in the stars as we pass from the F to the Mb type vary in the same direction as from the Sun to the sun-spots.
Page 358 - Schaeberle, and above all to the estatement (p. 126, loe. cit.) that " there is no evidence to indicate "that either electricity or magnetism has anything to do with the arrangement of coronal matter in the Sun's neighbourhood"; and, moreover, admitting the sorting effect on the lighter materials ejected from the Sun due to the pressure of light, yet, in any discussion of the constitution of the corona, the great part played by the ejective forces in the Sun, actively displayed in sun-spots and prominences...
Page 40 - In consequence of its high and constant reflecting power, this substance was used in the construction of a polariser and analyser adapted for work throughout the infrared spectrum. (2) It was shown that infra-red radiations are capable of being polarised out to a wave-length of 13...