V/81 Taxonomy of Barium Stars (Lu 1991)
Taxonomy of Barium Stars
Lu P.K.
<Astron. J. 101, 2229, (1991)>
=1991AJ....101.2229L 1991AJ....101.2229L
ADC_Keywords: Spectroscopy ; Stars, late-type ; Stars, barium
Abstract:
Image-tube spectra and photometric observations for 389 bariums stars have
been used to determine spectral classification, barium intensity, radial
velocity, luminosity, and kinematical properties. The objective of this
study is to obtain a homogeneous dataset for analyzing barium
characteristics in uniform fashion.
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Summary:
The objective of this study is to obtain a homogeneous dataset for analyzing
barium characteristics in uniform fashion. The analyses show that barium
stars appear to have young to old disk kinematics based upon whether they
are Ba weak or Ba strong. The Ba II line (4554A) is also identifiable in
dwarf stars; these dwarf barium stars are small in number and weak in
intensity. The analyses of the kinematics, luminosities, U,V,W velocity
distributions using image-tube radial velocities and statistical parallaxes
using proper motions and upsilon components show that the weak barium stars
generally tend to have smaller velocity dispersion, and brighter apparent
magnitudes at about same distance compared to strong Ba stars, and thus
lower luminosity. The solution for the mean spectroscopic distances, the
z-scale height distances and reduced proper motions also confirm the this
finding.
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File Summary:
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Filename Lrecl Records Explanation
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ReadMe 80 . This file
catalog.dat 191 389 The data
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See also:
II/192 : UBV Photometry of Barium stars (Watanabe+ 1993)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Description
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1- 4 I4 --- Seq [1/389]+ Sequential number.
5-13 A9 --- HD/DM *Durchmusterung or HD designation
14-15 A2 --- Source *[ *+^Kbhk<!] Source and remarks
16-17 I2 h RAh Right Ascension, B1900.0
18-21 F4.1 min RAm Right Ascension (minutes)
23 A1 --- DE- Declination sign
24-25 I2 deg DEd Declination, B1900.0
26-27 I2 arcmin DEm Declination (minutes)
29-37 A9 --- MK *Spectral type
39-41 F3.1 --- BaClass ? Ba intensity class
42 A1 --- BaCode *Ba intensity code
43 A1 --- u_BaClass Uncertainty flag (:) on BaClass
44-49 F6.3 mag m48 ? DDO m48
50-55 F6.3 mag 45-48 ? DDO color 45-48
56-61 F6.3 mag 42-45 ? DDO color 42-45
62-67 F6.3 mag 41-42 ? DDO color 41-42
68-73 F6.3 mag 38-41 ? DDO color 38-41
74-75 A2 --- o_m48 *[0-9md] No. of observations in DDO system
77-82 F6.3 mag Vmag V-mag. (all BVRI are photoelectric).
83-88 F6.3 mag B-V ? B-V colour index
89-94 F6.3 mag V-R ? V-R colour index
95-100 F6.3 mag R-I ? R-I colour index
101-102 I2 --- o_Vmag ? No. of observations in BVRI system
104-107 I4 mas/yr pmRA ? Proper motion in RA
109-112 I4 mas/yr pmDE ? Proper motion in Dec
114-117 I4 km/s RadVel ? Radial velocity
118 A1 --- r_RadVel *[abBcdij] Reference of Radial velocity
119 A1 --- u_RadVel [:v] Uncertainty(:)/variability(v) on RadVel
120-123 F4.1 mag Mv ? Absolute magnitude derived from spectral
type and luminosity class
125-130 F6.1 pc Dist ? Spectroscopic distance
133-137 F5.1 deg GLON *? Galactic Longitude, l(II)
140-144 F5.1 deg GLAT *? Galactic Latitude, b(II)
146-151 F6.1 km/s U ? U-velocity
153-158 F6.1 km/s V ? V-velocity
160-165 F6.1 km/s W ? W-velocity
166-172 F7.1 pc Zdis ? Z-scale height distance in pc
174-177 F4.1 mag Hm *? Reduced proper motion in magnitude
179-184 I6 --- SAO [1/258997]? SAO number
185-191 A7 --- Remarks *Remarks
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Note on HD/DM:
BD=Bonner Durchmusterung (I/122), CD=Cordoba (I/114), CP=Cape (I/108),
SD=Suedlicher BD (I/119)
MFU=MacConnell, Frye, Upgren, 1972AJ.....77..384M 1972AJ.....77..384M
default is HD
Note on Source, Remarks:
b new BaII from Bidelman objective-prism survey 1981AJ.....86..553B 1981AJ.....86..553B ;
1983AJ.....88.1182B 1983AJ.....88.1182B
h from Houk catalogues (Vol. 1-4, Cat. III/31, III/51, III/80, III/133)
k Keenan semi-barium stars (Ba=0.3-0.9) (1980)
K Keenan and McNeil (1989ApJS...71..245K 1989ApJS...71..245K)
l from Lu image-tube spectra
! HD 20644, BS 999; not HD60649 as listed Keenan and McNeil,
1989ApJS...71..245K 1989ApJS...71..245K
< star listed in the Perkins Catalog of Revised MK Types (Keenan
and McNeil, 1989ApJS...71..245K 1989ApJS...71..245K)
^ component velocity available in Catchpole et al 1977MNRAS.181..391C 1977MNRAS.181..391C
* MFU 112 = #163 (Paper I, 1983AJ.....88.1367L 1983AJ.....88.1367L);
+ radial velocity standard
Note on o_m48:
m from McClure and Forrester (1981) Publ. DAO 15, 439
(1981PDAO...15..439M 1981PDAO...15..439M)
d from Dean (1981) South. Africa Astron. Obs. Circ. 6, 10
(1981SAAOC...6...10D 1981SAAOC...6...10D)
Note on GLON, GLAT:
values present only when kinematical data are available
Note on r_RadVel: source of radial velocity:
a from Abt and Biggs (1972) (catalogue III/4)
b from Beavers and Eitter (1986ApJS...62..147B 1986ApJS...62..147B)
B from Barbier-Brossat and Petit (1986A&AS...65...59B 1986A&AS...65...59B)
c from Catchpole, Robertson, and Warren (1977MNRAS.181..391C 1977MNRAS.181..391C)
C from Yale cross-corr. (Lu, 1985) IAU Coll. 88, 207
D form 2D-Frutti spectra
i image-tube velocity
j from Jorissem and Mayor (1988A&A...198..187J 1988A&A...198..187J)
Note on BaCode:
c certain Ba stars in MFU
m marginal Ba in MFU
n non-barium stars (Paper I, 1983AJ.....88.1367L 1983AJ.....88.1367L)
Note on MK:
- no luminosity class given in MSC
* HD 13551 listed as weak line F3 by Houk (MSC v1, Cat. III/31)
HD 22772 has Ib luminosity from DDO
HD 76225 composite spectral types F7/G+A(p Sr) by Houk (MSC v3,
Cat. III/80)
HD 87080 listed as weak line star by Houk (MSC v3, Cat. III/80);
Class V from DDO
HD 87761 Class V from DDO, Class II from Houk (MSC v1, Cat. III/31)
HD 123585 listed as F7 V weak line and strong Sr by Houk (MSC v2,
Cat. III/51)
HD 130255 Suggested as dwarf barium by Keenan
HD 150862 has composite spectral types of V+a (p Sr) by Houk (MSC v3,
Cat. III/80)
HD 202400 has Ap Sr spectral type by Houk (MSC v1, Cat. III/31)
Note on Hm: the reduced proper motion is defined by:
Hm = Vmag + 5 log(pm) - 5
= Mv + 5 log(T) - 3.379
where T is the tangential velocity (expressed in km/s)
and pm the total proper motion (expressed in arcsec/yr)
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Historical notes:
* Feb 7, 1995: prepared by Nancy G. Roman [ADC] and
Philippe Lu [Western Conn. St. U.]
* 25-Apr-1995: standardized at CDS
* 02-Nov-2004: Added bibcodes in ReadMe file.
(End) Francois Ochsenbein [CDS] 24-Apr-1995