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II/197         ISM towards IC 348 and Per OB2 (Cernis, 1993)

Interstellar extinction in the direction of the open cluster IC 348 and the Per OB2 association Cernis K. <Baltic Astron. 2, 214 (1993)> =1993BaltA...2..214C
ADC_Keywords: Photometry, Vilnius ; Clusters, open ; Extinction Keywords: open cluster - OB associations - dark clouds - interstellar extinction - photometric classification - Vilnius photometric system Abstract: The relationship between interstellar extinction and distance in the direction of dark clouds in the areas around the open cluster IC 348 and the association Per OB2 is determined using the results of photoelectric photometry of 189 stars in the Vilnius photometric system. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 81 189 The results of photometry (all stars) table2 53 40 The results of photometric quantification of stars in the vicinity of the dark cloud L1470 table4 70 46 The results of photometric quantification of IC 348 stars table6 69 100 The results of photometric quantification of stars in the region of the association Per OB2 bal.tex 52 83 TeX definitions tables.tex 179 670 TeX version of the tables
Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 4 A1 --- n_Seq [*] Note (1) 6- 11 A6 --- BD BD designation 13- 17 I5 --- HD []? HD designation 19- 20 I2 h RAh Right ascension B1950 22- 23 I2 min RAm Right ascension B1950 25- 26 I2 s RAs Right ascension B1950 27 A1 --- DE- Declination sign B1950 28- 29 I2 deg DEd Declination B1950 31- 34 F4.1 arcmin DEm Declination B1950 36- 43 A8 --- Sp spectral type 45- 49 F5.2 mag Vmag V magnitude (Vilnius system) 51- 54 F4.2 mag U-P U-P colour index (Vilnius system) 56- 59 F4.2 mag P-X P-X colour index (Vilnius system) 61- 64 F4.2 mag X-Y X-Y colour index (Vilnius system) 66- 69 F4.2 mag Y-Z Y-Z colour index (Vilnius system) 71- 74 F4.2 mag Z-V Z-V colour index (Vilnius system) 76- 79 F4.2 mag V-S V-S colour index (Vilnius system) 81 I1 --- n Number of independent observations
Note (1): 6. IDS 90-59 AB, {DELTA}m = 1.6, D = 2.4" . Measured together. 22. Photometric classification is uncertain. Possible photometric binary star as B3III+F5I. 36. ADS 2696A, {DELTA}m = 0.2, D = 6", measured separately. 37. ADS 2696B. 42. V magnitude from BSC4, Hoffleit (1982). 63. ADS 2723, {DELTA}m = 0.0, D = 11.4", measured separately. 67. o Per. V magnitude from BSC4, Hoffleit (1982). 69. The star has considerably lower QXZS values due to possible emission in the Hα line. 71. ADS 2729 AB, {DELTA}m = 0.2, D =1". Measured together. 77. ADS 2730, {DELTA}m = 0.2, D = 0.45" . Measured together. 97. LkHα 329 (Herbig and Rao 1972). The star has considerably lower QXZS values. 102. LKHα 330 (Herbig and Rao 1972). 106. ADS 2723, {DELTA}m = 0.0, D = 11". Measured together. 117. ADS 2771A. 118. ADS 2772AB, {DELTA}m = 2.5, D = 3". 121. ADS 2784 AB, {DELTA}m = 2.0, D = 2". 123. SB, Var V467 Per, eclipsing binary system. 127. ADS 2804 AB, {DELTA}m = 4.7 , D = 1". Measured together. 147. ADS 2834 A, {DELTA}m = 5.7, D = 7". Measured together. 149. V magnitude from BSC4, Hoffleit (1982). 152. ADS 2857, {DELTA}m = 2.3, D = 3". Measured together. 153. ADS 2859, {DELTA}m = 5.8, D = 22". Var X Per, (γ Cas type). Spectrum from BSC4, Hoffleit (1982). 155. ADS 2866 AB, {DELTA}m = 3.4, D = 1". Measured together. 159. Var, NSV 1418, β Cep- type. 163. V magnitude and spectrum from BSC4, Hoffleit (1982). 186. ADS 2975 AB, {DELTA}m = 0.2, D = 2". Measured together. 188. Var, NSV 1459, V = 6.98 -- 7.27 (BSC4, Hoffleit, 1982). 189. Var, AG Per, Eclipsing binary system. {DELTA}m = 0.8, D = 0.8". Measured together.
Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 3 I3 --- No Sequential number 5- 10 A6 --- BD BD number 12- 13 A2 --- Sp Spectral type 15 I1 --- n_Sp [1-2]? Note on Sp (1) 19- 25 A7 --- Sp(Viln) Spectral type from Vilnius system 27- 31 F5.2 mag Vmag V magnitude 33- 36 F4.1 mag Mv Absolute magnitude 37 A1 --- u_Mv uncertainty flag on Mv 39- 42 F4.2 mag E(B-V) Reddening 44- 47 F4.2 mag Av Visual extinction 49- 52 I4 pc Dist Distance 53 A1 --- u_Dist [)] uncertainty flag on Dist
Note (1): References for the spectra: 1: Cannon and Mayall (1949), 2: AGK 3 catalog.
Byte-by-byte Description of file: table4
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 4 A1 --- n_Seq [*] Note (1) 6- 11 A6 --- BD BD denomination 13- 14 I2 --- G []? Number in the Gingrich (1922) list 16- 17 A2 --- F Number in the Fredrick (1956) list 19- 25 A7 --- Sp Spectral type 27 A1 --- n_Sp [3-6] Note for Sp (2) 30- 37 A8 --- Sp(Viln) Spectral type from Vilnius system 39- 43 F5.2 mag Vmag V magnitude (Vilnius system) 45- 48 F4.1 mag Mv Absolute magnitude 49 A1 --- u_Mv Uncertainty flag on Mv 51- 54 F4.2 mag E(B-V) Redenning 56- 59 F4.2 mag Av Visual extinction 61- 64 I4 pc Dist Distance 65 A1 --- u_Dist [)] uncertainty flag on Dist 67- 70 A4 --- Mem Membership (3)
Note (1): Numbers of the most reliable cluster members, estimated by Fredrick (1956), are marked by asterisks. Note (2): References for spectra: 3: Harris et al. (1954), 4: Strom et al. (1974), 5: Vyssotsky and Williams (1948), 6: Herbig and Rao (1972). Note (3): nm: no member, m: member
Byte-by-byte Description of file: table6
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 10 A6 --- BD BD denomination 12- 18 A7 --- Sp Spectral type 20 A1 --- n_Sp [7-9] Note for Sp (1) 23- 30 A8 --- Sp(Viln) Spectral type from Vilnius system 35- 39 F5.2 mag Vmag V magnitude (Vilnius system) 44- 47 F4.1 mag Mv Absolute magnitude 48 A1 --- u_Mv uncertainty flag on Mv 50- 53 F4.2 mag E(B-V) Redenning 55- 58 F4.2 mag Av Visual extinction 60- 63 I4 pc Dist Distance 64 A1 --- u_Dist [)] uncertainty flag on Dist 66- 69 A4 --- Mem Membership (2)
Note (1): References for spectra: 7: Guetter (1977), 8: Klochkova & Kopylov (1985) 9: Seyfert et al. (1960) Note (2): nm: no member, m: member
Table 3: Distances of the Perseus dark clouds ------------------------------------------------------------ Source Distance (pc) Method ------------------------------------------------------------ Heeschen (1951) 200-300, 800 star counts Lynds (1969) 200-300 galaxy counts Cernicharo et al. (1985) 200, 300 star counts Cernis (1990) 160 and 220 photometric distance This work 160 and 260 photometric distance ------------------------------------------------------------ Table 5: Distance of the open cluster IC 348 ------------------------------------------------------------ Source Distance (pc) Method ------------------------------------------------------------ Gingrich (1922) 107 proper motion study Greenstein (1948) 160 spectroscopic parallaxes Harris et al. (1954) 380 spectroscopic parallaxes Fredrick (1956) 480 proper motion study Strom et al. (1974) 330 spectroscopic parallaxes This work 260 photometric distance ------------------------------------------------------------ Table 7: Distance of the Per OB2 association ------------------------------------------------------------ Source Distance (pc) Method ------------------------------------------------------------ Blaauw (1952) 300 spectroscopic parallaxes Morgan et al. (1953) 360 spectroscopic parallaxes Seyfert et al. (1960) 400 spectroscopic parallaxes Borgman and Blaauw (1964) 334 photometric distance Racine (1968) 330 spectroscopic parallaxes Guetter (1977) 413 spectroscopic parallaxes Klochkova and Kopylov (1985) 340 spectroscopic parallaxes This work 338 photometric distance ------------------------------------------------------------ References: Cannoni A.J. & Mayall M.W., 1949, Ann. Harvard Obs., vol. 112 Fredrick L.W., 1956, AJ, 61, 437 (1956AJ.....61..437F) Gingrich C.H., 1922, ApJ, 56, 139 (1922ApJ....56..139G) Guetter H.H., 1977, AJ, 82, 598 (1977AJ.....82..598G) Harris D.L. et al., 1954, ApJ, 119, 622 (1954ApJ...119..622H) Herbig G.H. & Rao K., 1972, ApJ, 174, 401 (1972ApJ...174..401H) Hoffleit D., 1982, The bright star catalogue, Yale University Observatory, New Haven (see also cat. V/50) Klochkova V.G. & KopylovJ.M., 1985, Izvestya Spec. Astrophys. Obs., 20, 3 (1985AISAO..20....3K) Seyfert C.K. et al., 1960, APJ, 132, 58 (1960ApJ...132...58S) Strom S.E. et al., 1974, PASP, 86, 798 (1974PASP...86..798S) Vyssotsky A.N. & Williams E.T.R., 1948, Publ. McCormick Obs., vol. 10 Courtesy: Vytas Straizys
(End) Patricia Bauer [CDS] 24-Nov-1994
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