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V/81                 Taxonomy of Barium Stars                  (Lu 1991)

Taxonomy of Barium Stars Lu P.K. <Astron. J. 101, 2229, (1991)> =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. 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 191 389 The data
See also: II/192 : UBV Photometry of Barium stars (Watanabe+ 1993) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
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
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 default is HD Note on Source, Remarks: b new BaII from Bidelman objective-prism survey 1981AJ.....86..553B ; 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) l from Lu image-tube spectra ! HD 20644, BS 999; not HD60649 as listed Keenan and McNeil, 1989ApJS...71..245K < star listed in the Perkins Catalog of Revised MK Types (Keenan and McNeil, 1989ApJS...71..245K) ^ component velocity available in Catchpole et al 1977MNRAS.181..391C * MFU 112 = #163 (Paper I, 1983AJ.....88.1367L); + radial velocity standard Note on o_m48: m from McClure and Forrester (1981) Publ. DAO 15, 439 (1981PDAO...15..439M) d from Dean (1981) South. Africa Astron. Obs. Circ. 6, 10 (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) B from Barbier-Brossat and Petit (1986A&AS...65...59B) c from Catchpole, Robertson, and Warren (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) Note on BaCode: c certain Ba stars in MFU m marginal Ba in MFU n non-barium stars (Paper I, 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)
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
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