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J/A+AS/106/333 uvby Photometry of the chemically peculiar stars (Adelman 1994)
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uvby Photometry of the chemically peculiar stars alpha Andromedae,
HD 184905, HR 8216, and HR 8434
Adelman S.J., Brown B.H., Caliskan H., Reese D.F., Adelman C.J.
<Astron. Astrophys. Suppl. Ser. 106, 333 (1994)>
=1994A&AS..106..333A (SIMBAD/NED Reference)
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ADC_Keywords: Stars, peculiar; Photometry, uvby
Keywords: stars: individual Alpha And - stars: individual HD 184905 -
stars: individual HR 8216 - stars: individual HR 8434 -
stars: chemically peculiar A
Abstract:
Differential Stroemgren uvby photometric observations from the Four College
Automated Photoelectric Telescope of four chemical peculiar stars is
presented and analyzed. The peculiar Hg-Mn star {alpha} And is found not
to be a photometric variable within the errors of measurement contrary to
some published studies. Observations of the magnetic CP star HD 184905 were
used to refine the zero epoch and the period which was found to be 1.85435
days. Our photometry and that of Morrison & Wolff are generally quite
similar. We find evidence for two sub-minima within the broad minimum in
both u and y. The cool magnetic CP star HR 8216 is non-variable in
agreement with previous studies that suggested it was constant or a very
long period variable. The CP star HR 8434 has a period of 1.43242 days and
shows a generally in phase variation of u, v, b, and y. The light curves
have two nearly equally maximum and a sharp minimum. The largest amplitude
is for u, 0.085 mag.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 84 80 alp And uvby photometry
table2 84 107 HD 184905 uvby photometry
table3 84 67 HR 8216 uvby photometry
table4 84 77 HR 8434 uvby photometry
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See also:
J/A+AS/103/1 (63 And, HD 192913, HR 8240, 108 Aqr)
J/A+AS/114/253 (HD 11187, HD 14940, HD 15144, 20 Eri & HR 8933)
J/A+AS/122/249 (HD 32633, 25 Sex, HR 7224 & HD 200311)
J/PASP/109/9 (HR 1643, Theta Aur, 49 Cam, and HR 3724)
J/A+AS/125/65 (HD 37776, HR 2258, HR 6958 & 108 Aqr)
J/A+AS/125/497 (Theta Vir and 109 Vir)
J/A+AS/133/197 (33 Tau, HD 50169 and HR 7786)
J/A+AS/134/53 (HD 15980, HR 1094, 33 Gem and HD 115708)
J/A+AS/136/111 (HD 35298, 19 Lyr, HD 192678 and HR 8216)
J/A+AS/136/379 (45 Leo, HR 4330, 49 Her and HR 6718)
Byte-by-byte Description of file: table1 table2 table3 table4
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian day
16- 21 F6.3 mag u(v-c) u filter variable-comparison
25- 30 F6.3 mag u(ch-c) u filter check-comparison
34- 39 F6.3 mag v(v-c) v filter variable-comparison
43- 48 F6.3 mag v(ch-c) v filter check-comparison
52- 57 F6.3 mag b(v-c) b filter variable-comparison
61- 66 F6.3 mag b(ch-c) b filter check-comparison
70- 75 F6.3 mag y(v-c) y filter variable-comparison
79- 84 F6.3 mag y(ch-c) y filter check-comparison
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Finally average and standard deviation:
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u v b y
Star v-c ch-c v-c ch-c v-c ch-c v-c ch-c
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alpha And
average -1.585 1.288 -1.498 1.827 -1.425 1.879 -1.347 1.915
std. dev. 0.008 0.006 0.007 0.006 0.008 0.006 0.008 0.007
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HD 184905
average -1.732 1.555 -1.206 1.353 -1.161 1.455 -1.104 1.510
std. dev. 0.032 0.008 0.008 0.004 0.014 0.005 0.015 0.006
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HR 8216 (1st year, period 2448366.9982-2448439.9638)
average 0.023 1.098 -0.302 1.225 -0.410 1.264 -0.475 1.306
std. dev. 0.007 0.012 0.008 0.010 0.004 0.014 0.003 0.009
(2nd year, period 2448530.7483-2448566.6251)
average 0.028 1.100 -0.296 1.227 -0.405 1.264 -0.463 1.302
std. dev. 0.003 0.005 0.005 0.005 0.004 0.004 0.004 0.005
(3rd year, period 2448873.8120-2449163.9614)
average 0.026 1.105 -0.298 1.227 -0.405 1.265 -0.464 1.305
std. dev 0.004 0.007 0.003 0.005 0.003 0.005 0.003 0.006
(4th year, period 2449253.7329-2449322.5885)
average 0.028 1.100 -0.297 1.226 -0.405 1.259 -0.464 1.304
std. dev. 0.005 0.009 0.005 0.005 0.003 0.007 0.003 0.009
(data set)
average 0.027 1.102 -0.297 1.227 -0.405 1.263 -0.464 1.304
std. dev. 0.004 0.007 0.004 0.005 0.003 0.006 0.004 0.006
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HR 8434
average -0.922 -0.268 -0.309 -0.368 -0.259 -0.130 -0.196 0.011
std. dev. 0.026 0.011 0.018 0.008 0.018 0.008 0.013 0.006
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(End) Patricia Bauer [CDS] 19-Mar-1994