J/AJ/129/2815 Eleven new γ Doradus variables (Henry+, 2005)
Eleven new γ Doradus stars.
Henry G.W., Fekel F.C., Henry S.M.
<Astron. J., 129, 2815-2830 (2005)>
=2005AJ....129.2815H 2005AJ....129.2815H
ADC_Keywords: Stars, variable ; Stars, early-type
Keywords: stars: early-type - stars: fundamental parameters -
stars: oscillations - stars: variables: other
Abstract:
We present new high-dispersion spectroscopic and precise photometric
observations to identify 11 new γ Doradus variables. Seven of
these new Doradus stars appear to be single, three are primaries of
single-lined binaries, and one has two distant visual companions; none
are double-lined or close visual binaries. Several of the stars show
spectroscopic line-profile and low-amplitude radial velocity
variability indicative of pulsation. All 11 stars are photometrically
variable with amplitudes between 8 and 93mmag in Johnson B and
periods between 0.398 and 2.454 days.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 45 11 Program, comparison, and check stars
table4.dat 52 3730 Photometric observations
table5.dat 107 66 Program star results from photometric analysis
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number
10- 11 A2 --- m_HD Multiplicity index on HD
13- 21 A9 --- Comp HD name of the comparison star
22 A1 --- n_Comp Note on Comp (1)
23- 31 A9 --- Check HD name of the check star
32 A1 --- n_Check Note on Check (1)
33- 38 F6.4 mag e_B(v-c) Standard deviation of the Variable-Comparison
Johnson B magnitude observations
40- 45 F6.4 mag e_B(ch-c) Standard deviation of the Check-Comparison
Johnson B magnitude observations
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Note (1): Notes on Comp and Check, defined as follows:
c = The K1 III check star varies by 0.01mag with a timescale of
approximately 130 days.
d = The F5 V comparison star is a new eclipsing binary with a period of
5.01 days. Data from two partial nights during eclipse are not included
in Table 4 or in the analysis.
e = The G5 III check star varies by 0.015mag with a timescale of
approximately 60 days.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD number
10- 11 A2 --- m_HD Multiplicity index on HD
13- 24 F12.4 --- HJD Heliocentric Julian Date
26- 31 F6.3 mag B(v-c) ?=99.999 Variable-Comparison differential mag
in B (1)
33- 38 F6.3 mag V(v-c) ?=99.999 Variable-Comparison differential mag
in V (1)
40- 45 F6.3 mag B(ch-c) ?=99.999 Check-Comparison differential mag
in B (1)
47- 52 F6.3 mag V(ch-c) ?=99.999 Check-Comparison differential mag
in V (1)
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Note (1): The '99.999' signifies that the differential magnitude was discarded
because its internal standard deviation exceeded 0.01mag.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
7- 8 A2 --- m_HD Multiplicity index on HD
10 A1 --- Band [BV] Photometric band
12- 23 F12.4 d HJD1 Julian date of beginning of observation
24 A1 --- --- [-]
25- 36 F12.4 d HJD2 Julian date of end of observation
38- 40 I3 --- Nobs Number of observations
42- 47 F6.4 d-1 Freq Frequency
49- 54 F6.4 d-1 e_Freq Error in Freq
56- 62 F7.5 d Per Period
64- 70 F7.5 d e_Per Error in Per
72- 75 F4.1 mmag Amp Peak-to-peak amplitude
77- 79 F3.1 mmag e_Amp Error in Amp
81- 84 F4.2 --- BAmp/VAmp ? B/V amplitude ratio
86- 89 F4.2 --- e_BAmp/VAmp ? Error in BAmp/VAmp
91-101 F11.3 d Tmin JD time of minimum of light
103-107 F5.3 d e_Tmin Error in Tmin
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 01-Feb-2006