1998A&A...330..222B


Query : 1998A&A...330..222B

1998A&A...330..222B - Astronomy and Astrophysics, volume 330, 222-224 (1998/2-1)

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

BOZIC H. and HARMANEC P.

Abstract (from CDS):

An analysis of differential UBV measurements of HD 6226 secured between 1982 and 1995 at Hvar, and combined with the Hipparcos satellite Hp photometry, led to the finding that this unfrequently 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.

Abstract Copyright:

Journal keyword(s): stars: individual: HD 6226 - stars: emission-line - stars: variables: other

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 * 68 Cas * 00 44 26.1915514056 +47 51 50.342883408   5.520 5.648     B5V 104 0
2 * omi Cas Be* 00 44 43.5186650 +48 17 03.713573 3.91 4.44 4.50 4.45 4.50 B5IIIe 274 0
3 HD 6114 ** 01 03 01.54709 +47 22 34.1724   8.43 8.31 7.59   A9IV 74 0
4 HD 6226 Be* 01 03 53.3582813400 +47 38 32.261195544 6.18 6.79 6.82     ~ 46 0
5 * phi And Be* 01 09 30.12562 +47 14 30.4594 3.84 4.18 4.25 4.22 4.27 B5IIIe 231 0
6 * 2 Per SB* 01 52 09.3723086736 +50 47 34.054111608 5.38 5.623 5.689     B9pHgMn 93 0
7 * g Per * 02 02 18.1084057296 +54 29 15.145135980 4.64 4.96 5.04 5.01 5.06 B8III 97 0
8 HD 192685 Be* 20 15 15.8954222 +25 35 31.054895   4.584 4.753     B3V 135 0

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2022.05.28-19:04:03

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