HL Tau 76


HL Tau 76

Starbox begin
name= [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HL%20Tau%2076 HL Tau 76]
Starbox observe
epoch=J2000.0 (ICRS)
constell=Taurus
ra=RA|04|18|56.46SIMBAD, accessed June 12, 2007.]
dec=DEC|+27|17|51.4
appmag_v=14.1–15.28Combined General Catalogue of Variable Stars (GCVS), v. 4.2. CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?II/250 II/250] .]
Starbox character
b-v=0.2
class=DAV5 [http://adsabs.harvard.edu/abs/1999ApJS..121....1M A Catalog of Spectroscopically Identified White Dwarfs] , George P. McCook and Edward M. Sion, "Astrophysical Journal Supplement" 121, #1 (March 1999), pp. 1–130. CDS ID [http://vizier.u-strasbg.fr/viz-bin/Cat?III/210 III/210] .]
variable=DAV (ZZ Ceti)
Starbox astrometry
prop_mo_ra=66
prop_mo_dec=−72
Starbox catalog
names=EGGR 265, V411 Tau, V411 Tauri, WD 0416+272

HL Tau 76 is a variable white dwarf star of the DAV (or ZZ Ceti) type. It was observed by G. Haro and W. J. Luyten in 1961 [es icon [http://adsabs.harvard.edu/abs/1961BOTT....3...35H Nueva estrella enana blanca en las nubes obscuras del Toro] , G. Haro and W. J. Luyten, "Bol. Obs. Tonantzintla y Tacubaya" 3, 35, no. 21.] , and was the first variable white dwarf discovered when, in 1968, Arlo U. Landolt found that it varied in brightness with a period of approximately 749.5 seconds, or 12.5 minutes. [http://adsabs.harvard.edu/abs/1968ApJ...153..151L A New Short-Period Blue Variable] , Arlo U. Landolt, "Astrophysical Journal" 153, #1 (July 1968), pp. 151–164.] Like other DAV white dwarfs, its variability arises from non-radial gravity wave pulsations within itself. [http://adsabs.harvard.edu/abs/1990RPPh...53..837K Physics of white dwarf stars] , D. Koester and G. Chanmugam, "Reports on Progress in Physics" 53 (1990), pp. 837–915.] , § 7. Later observation and analysis has found HL Tau 76 to pulsate in over 40 independent vibrational modes, with periods between 380 seconds and 1390 seconds. [ [http://adsabs.harvard.edu/abs/2006A%26A...446..237D Whole Earth telescope observations of the ZZ Ceti star HL Tau 76] , N. Dolez, G. Vauclair, G., S. J. Kleinman, M. Chevreton, J. N. Fu, J.-E. Solheim, J. M. González Perez, A. Ulla, L. Fraga, A. Kanaan, M. Reed, S. Kawaler, M. S. O'Brien, T. S. Metcalfe, R. E. Nather, D. Sanwal, E. W. Klumpe, A. Mukadam, M. A. Wood, T. J. Ahrens, N. Silvestri, D. Sullivan, T. Sullivan, X. J. Jiang, D. W. Xu, B. N. Ashoka, E. Leibowitz, P. Ibbetson, E. Ofek, D. Kilkenny, E. G. Meištas, D. Alisauskas, R. Janulis, R. Kalytis, P. Moskalik, S. Zola, J. Krzesinski, W. Ogloza, G. Handler, R. Silvotti, and S. Bernabei, "Astronomy and Astrophysics" 446, #1 (January 2006), pp. 237–257.]

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