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Boletin Asociacion Argentina Astronomia N°. 36

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Boletin Asociacion Argentina Astronomia N°. 36 BOLETIN DE LA ASOCIACION ARGENTINA DE ASTRONOMIA N°. 36 1990 ASOCIACION ARGENTINA DE ASTRONOMIA Personeria Juridica 11.811 Provincia de Buenos Aires PRESIDENTE Dr. Juan J. Claria VICE PRESIDENTE Dr- Hugo Levato SECRETARIO Dr. Emilio Lapasset TESORERO Lic. Raul Perdomo VOCAL PRIMERO Dra. Estela Brandi VOCAL SECUNDO Sr. Juan G. Sanguin VOCAL SUPLENTE Lic. Monica Villada BOLETIN DE LA ASOCIACION ARGENTINA DE ASTRONOMIA N 36 SAN JUAN, 1990. BOLETIN DE LA ASOCIA CION ARGENTINA DE ASTRONOM I A N# 36 Editor Direccion Juan Josd Claria Observatorio Astronomico Laprida 854 - 5000 Cordoba Argentina Telex 51-822 BUCOR, Obs.Astr. Secretaria Editorial Complejo Astronbmico EI Leoncito Silvia Galliani de Santa Fd 198 (0) Pico Casilla de Correo 467 5400 San Juan Argentina Telex 59134 entop-AR Pubiicado con ayuda econbmica dei Consejo Nacional de Investigaciones Cientificas y Tdcnicas (CONICET) de Argentina B O L E T I N DE L A AS OCIACION ARGENTIN A DE A S T RO N O M I A N* 36 REUNION DE LA ASOCIACION ARGENTINA DE ASTRONOMIA REALIZADA EN LA CIUDAD DE SAN JUAN (ARGENTINA) ENTRE EL 18 Y EL 22 DE SETIEMBRE DE 1990 INSTITUCIONES PARTICIPANTES QIC Comisidn de Investigaciones de la Provincia de Buenos Aires CONICET Consejo Nacional de Investigaciones Cientlficas y Tecnologicas CASILEO Complejo Astrondmico EI Leoncito COSICOR CEICYT Centro de Investigaciones Cientificas y Tecnologicas (Mendoza) CIOp Centro de Investigaciones Opticas Departamento de Astronomia, Universidad de Chile Department of Astronomy, University of California, USA Departamento de Fisica, Facultad de Ciencias Exactas, Universidad Nacional de La Piata FCAGLP Facultad de Ciencias Astronomicas y Geofisicas de la Universidad Nacional de La Piata IER3/CB Paris, Francia IAR Instituto Argentino de Radioastronomia IAFE Instituto de Astronomia y Fisica dei Espacio Instituto de Fisica de Rosario Instituto de Biologla Celular, FMC, Universidad Nacional de Cordoba Instituto Ant&rtico Argentino Instituto de Fisica, UFRGS, Porto Alegre Brasil Max-Planck-Institut fur Radioastronomie National Optical Astronomy Observatories Nanjing Astronomical Instrument Research Center, Academia Sinica, Nanjing, China OAFA Observatorio Astronomico "Felix Aguilar" (San Juan) OAC Observatorio Astronomico de Cordoba OAM Observatorio Astronomico de Mercedes, Provincia de Buenos Aires OICT Observatorio Astronomico de Cerro Tololo Chile Observatorio Astrondmico Municipal de Rosario Steward Observatory, University of Arizona, USA Yale Southern Observatory INDICE GENERAL Palabras dei Presidente de la A.A.A. J.J. Claria XVII ESTRUCTURA Y EVOLUCION ESTELAR Ctimulos globulares galicticos con matalicidades extremadamente bajas J.J. Claria; D. Geisler; D. Minniti 3 EI ctimulo abierto NGC 5662 y su Cefeida vecina V Centauri J.J. Claria; E. Lapasset; M.A. Bosio 15 Dimensiones absolutas y estado evolutivo de RS Sagitarii M.A. Cerruti? M.A. De Laurenti 28 EI mdtodo de grilla aplicado al anaiisis fotome- trico de los sistemas de contacto AW Virginis y BP Velorum M. Gomez; E. Lapasset; R. Farinas 38 Hacia la busqueda de una taxonomia de objetos ce- lestes. I. Cumulos abiertos. H.L. Tignanelli; C. Mostaccio; S. Gordillo; A. Plastino; R.A. Vazquez; A. Feinstein 45 Seguimiento espectroscopico de estrellas simbio- ticas australes. R.H. Barbi; E.E. Brandi; O.E. Ferrer; L.G. Garcia 57 Bol. Asoc. Arg. de Astr. I Observaciones en OH de fuentes seleccionadas dei I.R.A.S. desde el hemisferio sur. A.M. Silva; I. Azc&rate; W.G.L. Poppel; L. Likkel 72 ESTRUCTURA GALACTICA Y DINAMICA ESTELAR Informe Invitado: La distancia al centro gal&ctico. V.M. Blanco 87 Expansion dei HI interestelar vinculado a ARA OBI. J.R. Rizzo; E. Bajaja 107 HI en expansibn en la zona de CAR OB2. J.R. Rizzo; E.M. Arnal; E. Bajaja 118 MATERIAL INTERESTELAR Observaciones en el continuo de radio de la nebulosa de Gum. J.C. Testori; F.R. Colomb 133 Halo extendido de HI en NGC 4449. E. Bajaja; W. Huchtmeier; U. Klein 147 GALAXIAS Y COSMOLOGIA Distribucion espacial y formacion de cumulos estelares en la region de la Barra de la Nube Mayor de Magallanes. E. Bica; J.J. Claris; H. Dottori 153 II Bol. Asoc. Arg. de Astr. Sobre el problema de generar puntos al azar en el espacio. D.D. Carplntero 166 Fotometria fotogr&fica digital de NGC 5253. J.L. Sdrsic; C.J. Donzelli 175 Propiedades estadlsticas de las galaxias de bajo brillo superficial. M.C. Martin? E. Bajaja 183 8I8TEMA SOLAR Periodo de rotacion y curva de luz dei aste- roide 423 Diotima. R. Gil Hutton 193 Comparacion de catalogos mediante observacio- nes de asteroides. J •G •, Sanguin; R.L Branham, Jr. 201 Sobre la conceptualizacion dei sistema Tierra- Sol-Luna en ninos de seis a once anos. H. Tignanelli; M. Espindola; F. Suarez; S. Durilen 209 An&lisis de los afelios de 179 cometas de largo periodo considerando el efecto de la marea ver- tical de la galaxia. A. Brunini; D.M. Canosa 225 Bol. Asoc. Arg. de Astr. III ASTROMETRIA Observaciones de radio estrellas y estrellas dei cata­ logo S.A.O. con el Circulo Meridiano Repsold dei Observatorio Astronomico "F£lix Aguilar" de San Juan. R.A. Carestia; W.L. Castro; M. Gallego; C.C. Malla- maci; L.F. Marmolejo; J.L. Navarro; J.A. Perez; J.A. Sedeño. 245 Descripcion analitica dei Cuarto Catalogo dei Circulo Meridiano de San Juan (CMSJ4). C.C. Mallamaci 248 Latitud inedia dei Observatorio Astronomico "Felix Aguilar". Estudio de su variacion. W.T. Manrique; J.F. Baldivieso 264 Variacion de la latitud instantanea, Pilar Astro- labio Danjon dei OAFA. W. Manrique; F. Baldivieso; A. Serafino; E. Actis; E. Alonso; R. Podesta 274 INSTRUMENTAL Y TECNICAS DE REDUCCION Nuevas calibraciones empiricas de abundanda meta- lica para fotometria de Washington de gigantes G y K. D. Geisler; J.J. Claria; D. Minitti 287 Dos nuevos telescopios para Astronomia en China. J . Cheng 301 IV Bol. Asoc. Arg. de Astr. Sisterna de procesamiento de imagenes aplicado a la fotometria superficial de galaxias. M.A. Bosio; C.J. Donzelli 311 Btisqueda de sitio astrondmico en bases anttir- ticas argentinas. J.H. Calderon; P.G. Recabarren; M.J. Lombardo H.A. Ochoa 316 Sistema digitalizador de senales de video. P. Recabarren; J.H. Calderon; G. Giovanola; J. Sanchez; L. Espinosa 326 Elementos de Software para diseno optico. J. Campitelli 334 Nuevo fotopolarimetro automatico para el CASLEO: electronica dei instrumento. E. Martinez; J.L. Aballay; A. Martin; H. Ruartes 343 Automatizacion dei espectrografo Cassegrain dei CASLEO. E. Martinez; J.L. Aballay; A. Martin; H. Ruartes 386 RESUMENES DE TRABAJOS Reduccion digitalizada de interferogramas G. Goldes; G. Carranza 401 Efectos de alineamiento en ctimulos de galaxias H. Muriei; M. Nicotra; D. Garcia Lambas; L. Ruiz 403 Bol. Asoc. Arg. de Astr. V Funcion de correlacion angular cruzada de cumulos de galaxias. D. Garcia Lambas; M. Nicotra 404 Dos nebulosas planetarias en las cercanias dei centro galactico. A. Gutidrrez-Moreno; H. Moreno; G. Cortes 406 Consideraciones flsicas acerca de la region nuclear de NGC 3256. E . L. Aguero; S.L. Lipari 408 cEs la masa de mercurio 1/6000000? R.L. Branham, Jr. 409 Anomalias de abundancias en la estrella CP HD 22920. Z. Lopez Garcia; S.M. Malaroda; M.G. Grosso 411 Formacion de galaxias en modelos disipativos. M.B. Mosconi; D. Garcia Lambas 413 Hidrogeno neutro en direccion a la nebulosa de Gum. G. Dubner; E. Giacani? C. Cappa de Nicolau; E. Reynoso 415 HiUna burbuja de polvo en el cumulo globular NGC 6624? J.C. Forte; S. CeiIone; M. Mendez; I. Vega 418 El proyecto SAC-B: objetivo e instrumentacion H. S. Ghielmetti; A.M. Hernandez; J.M. Gulich 419 VI Bol. Asoc. Arg. de Astr. AnAlisis comparativo de fulguraciones en rayos X A.M. Hern&ndez; M.G. Rovira? C.H. Mandrini; M.E. Machado 421 Evaluacion de los procedimientos de optimiza- ci6n de las soluciones fotometricas en siste- mas de contacto. E. Lapasset; M. Gomez; R. Farinas 423 Busqueda de burbujas de HI alrededor de estre- llase WR: HD 50896. C. Cappa de Nicolau; V.S. Niemela 424 Estudio de la fotosfera de /3 Monocerotis A. C. Maranon Di Leo; A.E. Ringuelet 425 La fase de "onset" en las fulguraciones de dos bandas. M.G. Rovira; C.H. Mandrini; A.M. Hernandez; M.E. Machado 426 Formacion de lineas en atmosferas extendidas en expansion tratadas con geometria esferica. L. S. Cidale; A.E. Ringuelet 427 Modelo de atmosfera extendida para HD 50138. A. Vazquez; A.E. Ringuelet 429 Determinacion de velocidades de rotacion en estrellas B Be: procesos fisicos y metodos. A.R. Diaz; A.E. Ringuelet 430 Simulaciones numericas cosmologicas. M. Abadi; D. Garcia Lambas 433 EI sistema de referencia celeste dei Internatio- Bol. Asoc. Arg. de Astr. VII nal Earth Rotation Service (IERS). E.F. Arias 435 Analisis de coherencia entre ”frames” celestes extragal&cticos elaborados con la tecnica VLBI. E.F. Arias 440 Un nuevo metodo de analisis y reduccidn de ob- servaciones VLBI. E.F. Arias; M.S. De Biasi 446 Hipparcos-VLBI: el camino a un sistema celeste primario ideal. E.F. Arias 449 El espectro de la estrella CP HR 8137. M.G. Grosso; S.M. Malaroda; Z. Lopez Garcia 454 ¿Es HD 37129 una estrella peculiar?. S.M. Malaroda; 0.1. Pintado 455 VIII Bol Asoc. Arg. de Astr. INDEX Palabras dei Presidente de la A.A.A. J.J. Claria XVII STRUCTURE AND 8TELLAR EVOLUTION Galactic globular clusters with extremely low metallicities J.J. ClariA; D. Geisler; D. Minniti 3 The open cluster NGC 5662 and its neighbouring cepheid V Centauri J.J. Claria; E. Lapasset? M.A. Bosio 15 Absolute dimensions and evolutive state of RS Sagitarii M.A. Cerruti? M.A. De Laurenti 28 The grid technique applied to the photometric analysis of contact systems AW Virginis and BP Velorum M.
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