III/22 Rotation of Evolving A and F Stars (Danziger+ 1972) ================================================================================ Rotation of Evolving A and F Stars Danziger I.J. and Faber S.M. =1972A&A....18..428D ================================================================================ ADC_Keywords: Rotational velocities ; Stars, A-type ; Stars, F-type Description: The authors have studied a vertical strip in the HR diagram covering the range of spectral types A5 through F9. Rotational velocities for a total of 579 stars of all luminosity classes were accumulated. HR number, rotational velocity v sin(i), (b-y) index, m1, c1, reference and group are given. The rotational velocities are also included in the compilation by Uesugi and Fukuda (catalog ) Introduction: Approximately 360 stars from the Bright Star Catalogue (Hoffleit, 1964) were observed with the coude spectrograph on the 84 in. telescope at Kitt Peak National Observatory at a dispersion of 13.6 A/mm. A few stars were observed with the coude spectrograph on the 100 in. telescope at Mt. Wilson. The remainder were obtained from the published material that the authors considered to provide reliable rotational velocities. The values given here generally agree with the mean v sin(i) found in the literature to within 15%. The method for determining the rotational velocities is somewhat different from the usual approach. A grid of standard stars, judged from their line-widths to have small rotation, was chosen. Five sections of their spectra traced on the microphotometer at Harvard College Observatory were mathematically broadened according to the usual formula to provide a grid of spectra with which observed spectra could be compared to obtain the rotational velocity. See also: III/63 : Revised Catalogue of Rotational Velocities (Uesugi+ 1982) V/50 : The Bright Star Catalogue, 5th Ed. (Hoffleit+ 1991) GCPD/04 : General Catalog of Photometric Data, maintained at Lausanne/Geneva Observatory File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file data.dat 56 580 Rotational Velocities and Photometric Data -------------------------------------------------------------------------------- Byte-by-byte Description of file: data.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-4 I4 --- HR *Number in the Yale Catalogue of Bright Stars 11-13 I3 km/s vsin(i) *? Rotational Velocity 19-24 F6.3 mag b-y ? (b-y) index 30-35 F6.3 mag m1 ? m1 = (v-b) - (b-y) 41-46 F6.3 mag c1 ? c1 = (u-v) - (v-b) 51 I1 --- ref *? Source of photometric data 56 A1 --- group *[A-N] Group -------------------------------------------------------------------------------- Note on HR: (Hoffleit D., 1964) Note on vsin(i): v sin(i) for HR 3889 was given as "175,30*" in published catalog. v sin(i) for HR 3936 was given as " 90,30*". These values in this file are blank. Note on ref: 1 = Stromgren B. & Perry C.L. (1962) 2 = Breger M. (1969) When no source is given, the data were obtained by the authors. Note on group: The main-sequence band was subdivided into six groups (A to F), each occupying a specific area in the HR diagram. (see Fig. 3 in the original paper) -------------------------------------------------------------------------------- References: Breger M. (1969) Astrophys. J. Suppl. Ser., 19, 99. =1969ApJS...19...99B Danziger I.J. and Faber S.M. (1972) Astron. Astrophys., 18, 428. =1972A&A....18..428D Hoffleit D. (1964) Catalogue of Bright Stars, Yale University Press. =Catalog Stromgren B. & Perry C.L. (1962) Photoelectric uvby Photometry for 1217 Stars Brighter than V = 6.5mag. (see catalog , or ) ================================================================================ (End) Julie Anne Watko [SSDOO/ADC] 30-May-1996