HL Tau 76

| b-v=0.2 names=EGGR 265, V411 Tau, 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, 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. Like other DAV white dwarfs, its variability arises from non-radial gravity wave pulsations within itself., § 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.

The designation HL Tau 76 derives from the discovery of this star as a white dwarf, when it was described as Taurus no.76 in a publication authored by Guillermo Haro and Willem Jacob Luyten. It was then included in the 57th name-list of variable stars and given the variable star designation V441 Tauri.{{cite journal | display-authors=1 | last1=Kukarkin | first1=B. V.

References

1. [[Combined General Catalogue of Variable Stars]] (GCVS), v. 4.2. [[Centre de Données astronomiques de Strasbourg. CDS]] ID [http://vizier.u-strasbg.fr/viz-bin/Cat?II/250 II/250].
2. {{cite Gaia EDR3. 152371871863155840
3. (2011). "A Spectroscopic Survey and Analysis of Bright, Hydrogen-rich White Dwarfs". The Astrophysical Journal.
4. (2006). "Asteroseismological constraints on the structure of the ZZ Ceti star HL Tau 76". Astronomy and Astrophysics.
5. (2021). "A catalogue of white dwarfs in Gaia EDR3". Monthly Notices of the Royal Astronomical Society.
6. "HL Tau 76".
7. (1961). "Nueva estrella enana blanca en las nubes obscuras del Toro". Boletín de los Observatorios de Tonantzintla y Tacubaya.
8. (1968). "A New Short-Period Blue Variable". The Astrophysical Journal.
9. (1990). "Physics of white dwarf stars". Reports on Progress in Physics.
10. (2006). "Whole Earth telescope observations of the ZZ Ceti star HL Tau 76". Astronomy and Astrophysics.
11. (October 1969). "The Lowell Suspect White Dwarfs". Astrophysical Journal.
12. (January 2021). "Asteroseismology of the DAV star R808". Monthly Notices of the Royal Astronomical Society.
13. (January 1972). "Observations of rapid blue variables-III. HL Tau-76". Monthly Notices of the Royal Astronomical Society.