2007BaltA..16..199B

Query : 2007BaltA..16..199B

2007BaltA..16..199B - Baltic Astronomy, 16, 199-226 (2007/August-0)

Seven-color Vilnius photometry of the open cluster NGC 752.

BARTASIUTE S., DEVEIKIS V., STRAIZYS V. and BOGDANOVICIUS A.

Abstract (from CDS):

New photoelectric seven-color observations in the Vilnius system are presented for 65 stars in the region of the open cluster NGC752. Based on individual stars with accurate photometric classifications, we determine the apparent distance modulus (m-M)V=8.38±0.14 and the mean reddening to the cluster EY–V=0.027±0.010, or EB–V=0.034±0.013 (the errors given are the standard deviations for one star). The mean photometric metallicity for the main-sequence stars, [Fe/H]=-0.14±0.03, is found to be slightly lower than that derived for the red clump giants, [Fe/H]=-0.08±0.09. This difference suggests that red giants in later evolutionary phases may not have zero-age surface values of [Fe/H]. We made use of the least-squares minimization techniques to fit the Padova theoretical isochrones to the CMD, when the binary star population is taken into account. By varying the distance modulus, metallicity and age, the best match has been found between the seven magnitudes and colors of the observed stars and those of model binaries, which gives the distance modulus by 0.2 mag smaller than that derived from individual stars, i.e., (m-M)V=8.18, a closely similar metallicity ([Fe/H]=-0.12), and age of 1.6 Gyr. With these results, the fraction of photometric binaries among the main-sequence stars is ≥40%.

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Journal keyword(s):

Simbad objects: 66

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Number of rows : 66
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+37 407 * 01 55 12.6246242616 +37 50 14.552504052   10.31 9.39     G5III 73 0
2 BD+37 409 * 01 55 27.6708272496 +37 59 55.242193524   10.18 9.24     K0III 39 0
3 BD+36 348 SB* 01 55 27.7025652096 +37 34 04.639340208   10.50 10.14     F5.6 24 0
4 BD+37 410 SB* 01 55 29.2965858864 +37 50 26.313242820   10.32 9.94     F4III 23 0
5 BD+36 353 * 01 55 55.5328075728 +37 28 33.364191468   10.29 9.80     F2III 29 0
6 NGC 752 55 * 01 56 03.6866903018 +37 59 22.378060030   11.9 11.3     F2.9 34 0
7 NGC 752 58 gD* 01 56 08.9587788336 +37 39 52.728339492   10.89 10.41     F5.3 31 0
8 BD+37 416 SB* 01 56 10.3003408944 +37 45 00.030351564   10.35 10.00     F3.2 37 0
9 BD+37 416B * 01 56 11.1019463328 +37 45 11.387149776   11.61 11.19     F4.0 39 0
10 NGC 752 63 SB* 01 56 12.8776170624 +38 01 43.186888020   11.30 10.88     F4.8 29 0
11 BD+37 417 * 01 56 13.9546759656 +37 47 04.787314980   10.90 10.44     F0V 42 0
12 NGC 752 66 * 01 56 14.2798099632 +37 58 14.284309728   11.34 10.89     F2.2 25 0
13 BD+36 356 * 01 56 15.5028760944 +37 38 41.640142632   10.48 10.10     F2III 35 0
14 BD+36 357 SB* 01 56 18.6337962744 +37 37 39.421113744   11.1 10.7     F3.7 31 0
15 BD+37 418 SB* 01 56 18.8975265744 +37 58 00.460205436   9.98 8.97     G9III 36 0
16 BD+36 358 * 01 56 21.6380682480 +37 36 08.432374752   10.54 9.43     K0III 68 0
17 NGC 752 88 SB* 01 56 32.9559135864 +37 56 46.504102308   12.22 11.73     G0.0 30 0
18 BD+37 419 * 01 56 39.2172519701 +37 51 41.199095880   10.69 10.33     F3.6 40 0
19 NGC 752 105 * 01 56 47.5994079192 +37 24 30.611305260   10.68 10.26 10.20   F0V 27 0
20 BD+36 359 * 01 56 48.6005986452 +37 29 11.354265757   10.94 10.42     F2.8 37 0
21 HD 11812 * 01 56 49.7630628000 +38 01 21.696664764   9.57 9.13     F5.5IV-V(n) 28 0
22 HD 11811 MS* 01 56 50.4332970624 +38 01 58.141549236   9.75 8.91     G2V 44 0
23 BD+37 423 * 01 56 53.0478578400 +37 52 09.471510264   10.67 10.23     F4V 36 0
24 NGC 752 OpC 01 56 53.7 +37 45 06           ~ 712 0
25 NGC 752 123 * 01 56 55.7641419093 +37 47 59.433090318   11.7 11.03     F3V 35 0
26 BD+36 361 * 01 56 56.3382217728 +37 39 51.491372832   10.43 10.19     F5.1 38 0
27 NGC 752 135 ** 01 57 02.484792 +37 53 07.66032   11.671 11.211 11.206   F0V 30 0
28 BD+37 424 * 01 57 03.1090465536 +38 08 02.646530952   9.89 8.89     G8III 51 0
29 NGC 752 139 * 01 57 03.1771110120 +37 55 44.646449952   12.19 11.72     F4.3 40 0
30 NGC 752 140 * 01 57 03.6494171094 +38 05 11.915263237     11.72     F3.8 8 0
31 BD+36 363 * 01 57 17.0995872792 +37 26 08.973450528   10.66 10.18     F4.6 52 0
32 BD+37 427 * 01 57 20.7168532248 +37 51 43.251003576   10.53 10.10     F4III 35 0
33 NGC 752 185 * 01 57 23.7967558008 +37 52 11.950353480   12.75 12.21     G4.5 24 0
34 BD+37 428 * 01 57 25.9123941744 +37 51 42.695591832   11.13 10.19     G8III 22 0
35 BD+36 364 SB* 01 57 25.9971536808 +37 43 19.705396764   10.80 10.44     F4.9 40 0
36 NGC 752 189 * 01 57 26.1583997304 +37 39 20.221039152   11.68 11.26     F2.7 27 0
37 NGC 752 192 * 01 57 27.4669716984 +37 35 10.427611884   11.05 10.90     F4.9 35 0
38 BD+36 365 SB* 01 57 28.2609935472 +37 24 02.591876700   10.51 10.15     F4.1 36 0
39 BD+37 430 * 01 57 30.9217991208 +37 54 57.977486604   10.53 10.18     F2III 22 0
40 NGC 752 197 * 01 57 31.8435878040 +37 53 40.690325940   12.03 11.58 11.53   F3 43 0
41 BD+37 431 SB* 01 57 36.2116385405 +37 45 10.154947116   10.16 9.85     F2III 47 0
42 BD+36 367 Pe* 01 57 37.3482840600 +37 29 27.590431848   9.780 9.723 9.860   B9.5Vp?Hg? 51 0
43 BD+37 433 SB* 01 57 37.6728843264 +37 49 00.789669444   10.38 9.90     F3III 30 0
44 BD+37 432 * 01 57 38.9498019528 +37 46 12.414071532   9.98 9.00     G9III 70 0
45 NGC 752 214 * 01 57 39.4453277280 +37 52 25.937726340   10.82 10.44     F5.0 29 0
46 NGC 752 217 * 01 57 43.9588889352 +37 51 42.146343540   10.69 10.13     F2V 30 0
47 BD+37 434 * 01 57 44.7279060600 +37 59 18.455078220   10.48 10.09     F2III 54 0
48 NGC 752 220 ** 01 57 45.5303995056 +37 39 24.421493772   10.516 9.566 9.392   K0V 18 1
49 V* DS And SB* 01 57 46.0564787701 +38 04 28.431446959   10.89 10.52     F5.7 90 0
50 NGC 752 222 * 01 57 47.1332801280 +37 47 30.298041204   11.2 10.9     F3.4 27 0
51 NGC 752 226 * 01 57 51.4233762744 +37 53 05.533928016   11.96 11.58     G0 11 0
52 NGC 752 232 ** 01 57 55.1815593384 +37 52 46.107707340   12.04 11.60 11.57   F3.6 28 0
53 BD+37 438 * 01 57 56.4345945576 +37 50 01.120103556   11.09 10.66     F4.7 36 0
54 V* QX And SB* 01 57 57.7816919821 +37 48 22.453231805   11.736 11.25 11.23 10.68 F5 126 0
55 NGC 752 237 SB* 01 57 58.8380577456 +37 41 26.944061748   12.93 12.31     G3.1 23 0
56 BD+37 439 SB* 01 57 59.3463766904 +37 54 53.966263676   10.32 9.85     F2III 52 0
57 BD+36 373 SB* 01 58 07.6967785488 +37 39 57.081270924   11.2 10.6     F2.1 49 0
58 NGC 752 259 * 01 58 11.4129574776 +37 39 33.472227996   11.7 11.6     F4.2 46 0
59 NGC 752 261 * 01 58 12.2565914170 +37 32 38.299166033   11.4 11.2     F8.0 39 0
60 NGC 752 263 * 01 58 12.6931291872 +37 34 40.480835880   11.29 10.89 10.90   F2.6 37 0
61 NGC 752 266 SB* 01 58 16.8604780200 +37 38 15.997654788   11.64 11.21     F6.4 41 0
62 BD+37 441 Em* 01 58 29.8173119448 +37 51 37.575588024   10.23 9.29     G5 79 0
63 BD+37 444 SB* 01 58 36.8870823055 +37 45 10.723821795   9.94 9.62     F2V 47 0
64 NGC 752 302 * 01 58 38.1065456782 +37 32 15.695764772   11.63 11.18     F2.5 39 0
65 NGC 752 304 SB* 01 58 40.0614671712 +37 38 05.227413396   12.63 12.43     F2V 18 0
66 BD+37 448 * 01 58 52.9027843464 +37 48 57.229263828   10.07 9.04     K0III 93 0

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