Algol positions from Allegheny photographs.

Abstract

view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Algol positions from Allegheny photographs. Wagman, N. E. Abstract The material consi~s of a series of more than 30 plates taken for parallax from 1916 to 1923 and a current series of nearly 100 plates tegun in 1934 as a part of Burns's program of special objects. Parallax solutions in right ascension and declination have been made for both the old and the new series. The parallax in right ascension as determined by Daniel from the earlier series agrees with that given by the new series. The values of the parallax in declination are likewise in agreement but differ from those in right ascension. However, this difference is considerably less than that found at Sproul.1 Combining all the Allegheny material we have the relative parallaxes: Ir = `1038 ~ `loo~, 7r~ = .059 ~ 011 7ra+i = .041 ~ .004. The relative proper motion is less than `1001 in both right ascension and declination. With the above values residuals were computed for all the plates. These were grouped according to phase in the 1.87 year orbit of the third body of the Algol system. Craphs of these residuals in right ascension give evidence of a shift with a half-amplitude of about `103. Evidence of a smaller shift is seen in declination. 0bservations are being continued. I.Ap. J. 96, 420, i942. Allegheny Observatory, Pittsburgh, Pa. Publication: The Astronomical Journal Pub Date: June 1945 DOI: 10.1086/105853 Bibcode: 1945AJ.....51..125W full text sources ADS |