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HD 6226: a new bright B variable with occasional brightenings. Is it unrecognized Be star ?


Božić, Hrvoje; Harmanec, Petr
HD 6226: a new bright B variable with occasional brightenings. Is it unrecognized Be star ? // Astronomy and Astrophysics, 330 (1998), 222-224 (međunarodna recenzija, članak, znanstveni)


Naslov
HD 6226: a new bright B variable with occasional brightenings. Is it unrecognized Be star ?

Autori
Božić, Hrvoje ; Harmanec, Petr

Izvornik
Astronomy and Astrophysics (0004-6361) 330 (1998); 222-224

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Sažetak
An analysis of differential UBV measurements of HD 6226 secured between 1982 and 1995 at Hvar, and combined with the Hipparcos satellite H_p photometry, led to the finding that this infrequently observed star is a new variable, characterized by occasional brightenings accompanied by the reddening of the B-V, and blueing of the U-B index. We note that such behaviour was found for several Be stars like QR Vul or o Cas and it would be of interest to check whether also HD 6226 is not an unrecognized Be star. A period analysis of the photometric data indicates a possibility that the brightenings may occur periodically, with a period of 481.3 d. However, this finding needs to be tested since several other possible periods were also detected. Moreover, there is no a priori reason to believe that the brightenings must occur in regular intervals. If there is indeed a 481-d periodicity, then the nearest brightening should occur around Nov. 27, 1998. A spectroscopic study of the star will be crucial for a better understanding of its nature but further photometric monitoring is also very desirable.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
007004

Ustanove
Geodetski fakultet, Zagreb

Profili:

Avatar Url Hrvoje Božić (autor)

Citiraj ovu publikaciju

Božić, Hrvoje; Harmanec, Petr
HD 6226: a new bright B variable with occasional brightenings. Is it unrecognized Be star ? // Astronomy and Astrophysics, 330 (1998), 222-224 (međunarodna recenzija, članak, znanstveni)
Božić, H. & Harmanec, P. (1998) HD 6226: a new bright B variable with occasional brightenings. Is it unrecognized Be star ?. Astronomy and Astrophysics, 330, 222-224.
@article{article, year = {1998}, pages = {222-224}, keywords = {}, journal = {Astronomy and Astrophysics}, volume = {330}, issn = {0004-6361}, title = {HD 6226: a new bright B variable with occasional brightenings. Is it unrecognized Be star ?}, keyword = {} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus