1981年對這個和其它造父變星的光變曲線的研究表明,它屬於一個具有異常短時間和獨特行為的小群體。這表明金牛座EU可能是「第一個泛音」脈動星[14]。1987年,Gieren和傑米·馬修斯(英语:Jaymie M. Matthews)提出這顆恆星可能有兩個脈動週期,但後來被駁斥了。 現在的證據主要支援恆星脈動處於「徑向第一泛音模式」的觀點。對於這類恆星來說,脈動週期中1%的半徑變化相對較小[6], 到2007年,分散在35年時間範圍內的觀測表明,這顆造父變星的脈動週期可能已經改變[15]。
^Cannon, A. J.; Pickering, E. C., Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989), VizieR Online Data Catalog, October 1, 1993, 3135, Bibcode:1993yCat.3135....0C.
^Bersier, D.; et al, Fundamental parameters of Cepheids. IV. Radii and luminosities, Astronomy and Astrophysics, April 1997, 320: 228–236, Bibcode:1997A&A...320..228B.
^Evans, D. S.; Edwards, D. A., Photoelectric observations of lunar occultations. XII, Astronomical Journal, August 1981, 86: 1277−1287, Bibcode:1981AJ.....86.1277E, doi:10.1086/113008.
In particular, the SAO 94837 entry on p. 1280.
^Boyer, Kirk; et al, EU Tauri: An S-cepheid With A Changing Period, Bulletin of the American Astronomical Society, December 2007, 39: 845, Bibcode:2007AAS...211.6014B.
進階讀物
Matthews, J. M.; Gieren, W. P., Schmidt, E. G. , 编, Secular Changes in the Light Curve of the Short-Period Cepheid EU Tau, The Use of pulsating stars in fundamental problems of astronomy, Proceedings of IAU Colloq. 111, held in Lincoln, NE, 15–17 August 1988 (Cambridge University Press), 1989: 275, Bibcode:1989upsf.conf..275M.
Gieren, Wolfgang P.; et al, The Short-Period Cepheid EU Tau. I. New Photometric and Radial Velocity Data, Astronomical Journal, November 1989, 98: 1672, Bibcode:1989AJ.....98.1672G, doi:10.1086/115253.
Matthews, Jaymie M.; Gieren, Wolfgang P., Cox, A. N.; et al , 编, Frequency Analysis of the Unusual Short-Period Cepheid EU Tauri, Stellar Pulsation; Proceedings of the Conference held as a Memorial to John P. Cox at the Los Alamos National Laboratory, Los Alamos, NM, Aug. 11-15, 1986. Lecture Notes in Physics, Vol. 274, Lecture Notes in Physics 274 (Berlin: Springer-Verlag), 1987, 274: 187, Bibcode:1987LNP...274..187M, ISBN 978-3-540-17668-8, doi:10.1007/3-540-17668-3_202.
Gieren, W. P., Madore, B. F. , 编, A Study of the Short-period Cepheid EU-Tauri(PDF), Cepheids: Theory and Observations, Proceedings of IAU Colloquium No. 82, held 29 May - 1 June 1984 in Toronto, Canada (82) (New York: Cambridge University Press), June 1985, (82): 98 [2022-06-30], Bibcode:1985cto..conf...98G.
Sanwal, N. B.; Parthasarathy, M., UBV photometry of EU Tau., Astronomy and Astrophysics Supplement Series, January 1974, 13: 91–97, Bibcode:1974A&AS...13...91S.