Se informa el descubrimiento de ocho estrellas australes con emisión en HαAsociación Argentina de Astronomí

Kucewicz, B.

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Southern B-type stars with emission at H-alphaBoris Kucewicz Observatorio Astronómico - La PlataResumen: Se informa el descubrimiento de ocho estrellas aus­trales con emisión en H&Several years ago a program was started for the search of H-alpha emission in early type stars. It was decided to observe all stars of the “Bright Star Catalogue” south of the equator, falling in the spectral range O-AO. All observa- tions were made with the 2 prism spectrograph attached to the 32” La Plata reflector. A camera giving a reciprocal odispersión of 180 A/mm at H-alpha was used. The total number of stars in the program is 1454 of which 1219 were already observed. Pardal results of the survey were published already. (Jaschek, Jaschek and Kucewicz 1962; Kucewicz 1963; Jaschek, Jaschek and Kucewicz 1964; Kucewicz 1965; Kucewicz 1967). The purpose of the this note is to announce eight new emission line objects found among the last 318 stars observed, which correspond mainly, although not cx- clusively to the spectral range B5-A0.The main results are contained in table I.The first two columns provide the star identifications. The third. fourth and fifth give the visual magnitude, spec­tral type and radial velocity as taken from the “Bright Star Catalogue” (Hoffleit, 1964) # The last four column refers finally to the emission line. The sixth column gives the Julián date of the observation, the seventh the radial velo­city of the H-alpha line, the next to last the width oí the emission, in Km/sec and the last a visual estimate of the line intensity. The scale for this estimate is s = strong; m = médium and w = weak.TABLE INew emission line starsHR HD m Sp.t. V J.D. V2430000+a W Int.2501 49131 5.79 B3V + 17? 10968 + 21 310 m2656 53240 6.44 B8 + 23 11358 + 29 210 s3022 63215 5.88 B9 -|- 28 11038 — 197 320 w4147 91619 6.14 B5Ia + 7 11074 + 23 650 w4169 92207 5.46 AOIa — 12 11062 + 57 330 ni4250 94367 5.25 AOIa — 23 11056 — 166 450 w4262 94650 5.98 B8 11376 •— 12 440 w4438 100198 6.36 AOIa 11082 + 55 340 niI would like to express my thanks to Dr. C. Jaschek who suggested this observing program.BIBLIOGRAPHYC. Jaschek, M. Jaschek and B. Kucewicz, 1962, Bol. Asoc. Arg. de Astr. 4, 37.B. Kucewicz, 1963, Publ. Astr. Soc. Pac. 75. 192-G. Jaschek, M. Jaschek and B. Kucewicz, 1964, Zeitsch. f. Astroph. 59, 108.B. Kucewicz, 1965, Bol. Asoc. Arg. de Astr. 10, 63.B. Kucewicz, 1967, Information Bulletin for the Southern Hemis- phere, 11, 34.Boj,. N9 18 - Asoc. Aro. de Astr.10

Southern B-type stars with emission at H-alpha

http://sedici.unlp.edu.ar/bitstream/handle/10915/99220/Resumen__1_p._.pdf?sequence=1

Southern B-type stars with emission at H-alpha

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