J/A+AS/106/333 uvby photometry of four CP stars (Adelman+ 1994)
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 1994A&AS..106..333A
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 α 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.
Objects:
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RA (2000) DE Designation(s) (File)
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00 08 23.3 +29 05 26 alpha And = HD 358 (table1.dat)
19 34 43.9 +43 56 45 HD 184905 = V1264 Cyg (table2.dat)
21 26 51.6 +48 50 07 HR 8216 = HD 204411 (table3.dat)
22 06 13.6 +56 20 36 HR 8434 = HD 210071 = V444 Cep (table4.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 80 alp And uvby photometry
table2.dat 84 107 HD 184905 uvby photometry
table3.dat 84 67 HR 8216 uvby photometry
table4.dat 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)
J/A+AS/146/13 : (20 Eri, HR 1297, 12 CMa, and HD 134214)
J/A+A/368/225 : (HR 5341, HD 142070, HR 6967 & HR 8434)
J/A+A/390/1023 : (HR 194, HD 32966, HD 171782, and HR 7911)
J/A+A/401/357 : (60 Tau, HR 1528, HR 8216, HR 8770)
Byte-by-byte Description of file: table1.dat table2.dat table3.dat table4.dat
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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