Variable Stars in Globular Clusters and in Related Systems: by Helen Sawyer Hogg (auth.), J. D. Fernie (eds.)

By Helen Sawyer Hogg (auth.), J. D. Fernie (eds.)

This quantity includes the papers and discussions at IAU Colloquium No. 21 on Variable Stars in Globular Clusters and in comparable platforms held in Toronto at the twenty ninth, thirtieth and thirty first August 1972. It used to be the goal of the organizers that this assembly may still honour the lifestyles lengthy paintings during this box of Professor Helen Sawyer Hogg. She has been regularly energetic in observational examine on variables in globular clusters for forty six years and her catalogues and bibliographies in addition to her examine papers, evaluate articles and IA U reviews as chairman of the committee on variable stars in clusters are of basic value to all employees during this box. The scope of the colloquium lined either observational and theoretical facets of the matter, together with the connection of variables to non-variable cluster individuals, the placement of the variables within the HR diagram and their significance for difficulties of stellar evolution, empirical info at the variables, sessions and interval adjustments, and the appropriate elements of pulsation concept. The assembly used to be rather winning in bringing jointly observers and theorists. it is going to have completed its item if it has proven either observers and theorists that are the issues most fitted for assault this day. The assembly truly confirmed the nice significance of analysis on variables in globular clusters and similar platforms for our knowing either one of stellar evolution and stellar pulsation.

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Additional info for Variable Stars in Globular Clusters and in Related Systems: Proceedings of the IAU Colloquium No. 21 Held at the University of Toronto, Toronto, Canada August 29–31, 1972

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L. POWELL Dickens: No but I hope to be able to check this point using spectra of the same star taken by Sargent with conventional equipment. I see no reason to expect large systematic errors with equivalent widths from a spectracon in view of results obtained by others with similar equipment at Herstmonceaux. Jones: My narrow band photometry indicates that HD 116745, V 1, and the RR Lyraes in OJ Cen all have the same abundance within a factor of two. 0 did you use in your two colour plot? 28. Van den Bergh: Is it known if this type of star occurs in any particular type of globular cluster?

Inst. Neth. 7, 21. : 1961, Astron. J. 66, 384. : 1964, Astron. J. 69, 853. : 1965, Astrophys. J. 142, 1390. Hodge, P. : 1969, Astron. J. 74, 587. : 1969, Arkiv Astron. 5, 305. : 1971, Astron. J. 83, 697. Marchant, J. : 1965, J. Opt. Soc. Am. 55, 907. : 1956, Astron. J. 61, 69. : 1954, Astron. J. 59,162. : 1938a, Harvard Bull. No. 908. : 1938b, Nature 142, 715. : 1967, Publ. Astron. Soc. Pacific 79,439. : 1968, Astron. J. Suppl. 73, 204. : 1950a, Observatory 70, 144. : 1950b, unpublished. : 1963, Monthly Notices Roy.

The total number of true halo-type high-latitude (lbl ';:; 45 0) planetaries is therefore:::: 5, Assuming such objects to have a space distribution similar to that of globular clusters then yields a total popUlation of 5 x {119/16)=37 such objects in the entire Galaxy. So far K 648 in M15 is the only planetary that is known to be located in a globular cluster. A search for additional planetaries in globular clusters by Feibelman (unpublished) and by Andrews (Thackeray, 1971) has so far remained fruitless.

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