J/ApJS/119/83 IUE sample of binaries with hot component (Parsons+, 1998)
Ultraviolet and optical studies of binaries with luminous cool primaries and
hot companions. V. The entire IUE sample.
Parsons S.B., Ake T.B.
<Astrophys. J. Suppl. Ser. 119, 83 (1998)>
=1998ApJS..119...83P 1998ApJS..119...83P
ADC_Keywords: Stars, double and multiple ; Stars, supergiant ;
Spectra, ultraviolet; MK spectral classification
Keywords: stars: binaries: general - stars: fundamental parameters -
stars: supergiants - ultraviolet: stars
Abstract:
We have obtained or retrieved IUE spectra for over 100 middle- and
late-type giant and supergiant stars whose spectra indicate the
presence of a hot component earlier than type F2. The hot companions
are classified accurately by temperature class from their far-UV
spectra. The interstellar extinction of each system and the relative
luminosities of the components are derived from analysis of the UV and
optical fluxes, using a grid of UV intrinsic colors for hot dwarfs. We
find that there is fair agreement in general between current UV
spectral classification and ground-based hot component types, in spite
of the difficulties of assigning the latter. There are a few cases in
which the cool component optical classifications disagree considerably
with the temperature classes inferred from our analysis of UV and
optical photometry. The extinction parameter agrees moderately well
with other determinations of B-V color excess. Many systems are worthy
of further study especially to establish their spectroscopic orbits.
Further work is planned to estimate luminosities of the cool
components from the data herein; in many cases, these luminosities'
accuracies should be comparable to or exceed those of the Hipparcos
parallaxes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 258 Summary of IUE observations
table2.dat 91 302 Ground-based data for program stars
table4.dat 77 148 Optical analysis of cool + hot binaries
refs.dat 158 145 References (table 5 of paper)
notes.dat 78 462 Individual notes
addendum.dat 80 131 *Additional notes and positions by B. Skiff
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Note on addendum.dat: this file, added in February 2005, contains
position and additional notes by Brian Skiff (Lowell Observatory)
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD Number
8- 19 A12 --- FarUV Far-UV Image (1)
21- 32 A12 --- MidUV Mid -UV Image (1)
34- 38 A5 --- IUE IUE GO Program
40- 45 A6 "YY/DDD" Date Observation date
47- 65 A19 --- Rem Remark
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Note (1): H = high dispersion image
LS = both Large and Small aperture data used
Ls, lS = both apertures exposed, but one (represented in lowercase)
not useful
M = Multiple exposure
T = Trailed exposure
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD Number
7 A1 --- n_HD [+] Note on HD number (G1)
9- 21 A13 --- Name Other name
23- 26 F4.2 mag Vmag V magnitude
27- 28 A2 --- n_Vmag [v?: ] Note on Vmag (2)
30- 33 F4.2 mag B-V B-V colour index
34- 35 A2 --- n_B-V [s: v] Note on B-V (2)
37- 39 A3 --- Phot Other photometry (3)
41- 56 A16 --- SpType Spectral type
58- 64 A7 --- r_SpType References in refs.dat
66- 73 F8.2 d Per ? Binary period
74- 75 A2 --- u_Per [: )] Uncertainty flag on Per
77- 83 A7 --- n_Per Comment on binary period (4)
85- 88 F4.2 arcsec Sep ? Cool+hot binary separation
89 A1 --- u_Sep rms uncertainty on Sep
91 A1 --- Note [a] Individual note in notes.dat file
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Note (2): the flag has the following meaning:
v : variable
s : approximate B-V index derived from a graph of luminosity cool
stars having both types of photometry.
: : uncertainty flag
Note (3): the existing photometries are:
URI: systems that have known values of U, R and I
ri: values obtained from accurate transformation of overlapping
passbands, such as from Cousins to Johnson bands.
Note (4): "RV var" when radial velocity shows probable orbital variability
For 213310, binary period in yrs ([42 yr])
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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- 6 I6 --- HD HD Number
7 A1 --- n_HD [+] Note on HD (G1)
9- 23 A15 --- SpType Ground spectral type
25- 36 A12 --- UVType UV Spectral Type
38- 50 A13 --- Fit Cool + Hot Flux Fit (3)
52- 55 F4.2 mag Prec ? Standard deviation of the best fit
56 A1 --- n_Prec [a] a: see note in notes.dat file
58- 61 F4.1 mag DeltaV Magnitude difference between the components
62- 63 A2 --- u_DeltaV [: ] Uncertainty flag on DeltaV
(::) assumed parameter
65- 68 F4.2 mag E(B-V) Colour excess
69 A1 --- n_E(B-V) [A:] : Uncertainty flag, A: anomalous reddening
71- 74 I4 0.1nm CrPoint Wavelength of the "crossover point" at which
dominance of the total flux makes its
transition between the hot and cool components
75 A1 --- u_CrPoint Uncertainty flag on CrPoint
77 A1 --- Notes [abc] Additional Notes (4)
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Note (3): the cool component is in bytes 38-42, the hot component in
bytes 45-50. The luminosity class in byte 38 is
c: supergiants colours
b: interpolated bright giant colours
g: giants
For types later than G5, it is not always possible to distinguish the
fits between c and g; if this is so, the luminosity class in byte 38
is assumed and indicated by square brackets.
Note (4): the symbol refers to:
a: individual note detailed in notes.dat file
b: alternate fit with assumed spectral class
c: fit with alternate optical photometry
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref Reference code
6- 24 A19 --- BibCode BibCode
26- 59 A34 --- Aut Author names
62-158 A97 ---- Com Comments
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number
7 A1 --- --- [-]
8- 9 A2 --- m_HD For double stars, end of the HD number of
the secondary
11- 78 A68 --- Text Text of the note (1)
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Note (1): Comments and additional quantities and basic characteristics
not presented in the tables are presented here, arranged by HD number.
The references, three-letter codes in square brackets, are included in
refs.dat file. The following abbreviations are used:
ifm. for interferometric (usually speckle) binary star measurements;
RV for radial velocity, with values in km/s if given; and
sep. for angular separation of the component stars.
Color excess values "from [I04]" have been calculated
from equation (6) therein.
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Byte-by-byte Description of file: addendum.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD HD Number corresponding to the blue component
14- 15 I2 h RAh Right Ascension J2000 (hours)
17- 18 I2 min RAm Right Ascension J2000 (minutes)
20- 24 F5.2 s RAs Right Ascension J2000 (seconds)
26 A1 --- DE- Declination J2000 (sign)
27- 28 I2 deg DEd Declination J2000 (degrees)
30- 31 I2 arcmin DEm Declination J2000 (minutes)
33- 36 F4.1 arcsec DEs Declination J2000 (seconds)
38 A1 --- --- [T] Origin of the position (Tycho-2 and
Tycho Double Stars)
40- 43 F4.1 mag Vmag Visual magnitude
46- 57 A12 --- Sp UV Spectral type
60- 80 A21 --- Notes Notes by B. Skiff.
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Global Notes:
Note (G1): the '+' following the HD number indicates a composite spectrum
given as two consecutive numbers in the HD (Cat. III/135) catalog
with identical coordinates and Durchmusterung (Cat. I/122) numbers.
History:
* 04-Feb-1999: From ApJS electronic version
* 25-Feb-2005: Addition of the file "addendum.dat", supplied by B. Skiff.
References:
Parsons, Paper I. 1981ApJ...247..560P 1981ApJ...247..560P
Parsons & Montemayor, Paper II. 1982ApJS...49..175P 1982ApJS...49..175P
Parsons, Paper III. 1983ApJS...53..553P 1983ApJS...53..553P
Parsons & Ake, Paper IV. 1993ApJ...412..814P 1993ApJ...412..814P
(End) James Marcout, Patricia Bauer [CDS] 04-Feb-1999