2003A&A...407..377K


Query : 2003A&A...407..377K

2003A&A...407..377K - Astronomy and Astrophysics, volume 407, 377-384 (2003/8-3)

Interrelations between Vilnius and Stroemgren photometric systems: The luminosity indicator (v - X).

KALTCHEVA N., KNUDE J. and GEORGIEV V.

Abstract (from CDS):

Using the largest database of near-IR Ca II Triplet indices currently available (Cenarro et al., 2001MNRAS.326..959C, 2001MNRAS.326..981C), we confirm our finding about the influence of the Ca II stellar lines on the X magnitude of the Vilnius photometric system. This effect is significant for spectral sub-classes from early F until mid K. For this spectral range there is a linear relation between the v-X index and the strength of the infrared Ca II Triplet, which implies that the Ca II H&K lines should influence the difference in a similar way. For the spectral interval studied, v-X repeats the behavior of the Ca II Triplet with respect to gravity, temperature and metallicity. The Ca II Triplet lines are a powerful diagnostic of the stellar populations in galaxies because of their sensitivity to the main stellar atmospheric parameters. Being much easily achievable observationally and virtually reddening free, the v-X index may find similar applications. v-X is log g sensitive but additional means are required to break the dwarf - giant duplicity. For this purpose we have studied the variation of the v(Stroemgren)-B(Johnson) index with gravity, temperature and the equivalent width of the Ca II Triplet. Since v(Stroemgren)-B(Johnson) have a none overlapping variation with the Ca II Triplet the dwarfs and giants may be separated and Teff and log g may be estimated. The v(Stroemgren)-B(Johnson) index has furthermore the advantage that E(v-B)≃0.25E(B-V).

Abstract Copyright:

Journal keyword(s): methods: observational - techniques: photometric

CDS comments: Table 1 : designations Cenarro 'NNN' in column 1 not in Simbad.

Simbad objects: 35

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Number of rows : 35
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 1461 PM* 00 18 41.8676757921 -08 03 10.803829898   7.14 6.46     G3VFe0.5 342 1
2 * eps And PM* 00 38 33.3474310042 +29 18 42.311618884 5.72 5.25 4.38 3.70 3.19 G7IIIFe-3CH1 266 0
3 * 18 Cet PM* 00 45 28.6874352984 -12 52 50.911589280 6.86 6.76 6.15     G0V 217 0
4 HD 4628 PM* 00 48 22.9759750919 +05 16 50.209484954 7.22 6.64 5.74 4.99 4.52 K2.5V 471 0
5 * psi03 Psc * 01 09 49.2008972448 +19 39 30.264861132   6.263 5.562     F9IIIa 127 0
6 * ups And PM* 01 36 47.8415443907 +41 24 19.651368029 4.70 4.64 4.10 3.64 3.35 F9V 917 1
7 * nu. Psc * 01 41 25.8939097 +05 29 15.406225 7.36 5.81 4.44 3.38 2.67 K3III 232 0
8 HD 10307 SB* 01 41 47.1268541099 +42 36 48.221567818 5.69 5.58 4.96 4.43 4.10 G1V 481 0
9 * tau Cet PM* 01 44 04.0831371922 -15 56 14.927607677 4.43 4.22 3.50 2.88 2.41 G8V 1171 1
10 * lam Aur PM* 05 19 08.4754499121 +40 05 56.585080940 5.46 5.33 4.71 4.18 3.86 G1.5IV-VFe-1 509 0
11 * phi02 Ori PM* 05 36 54.3885728561 +09 17 26.416510827 5.70 5.04 4.09 3.33 2.78 G9.5IIIbFe-2.5 350 0
12 * 20 LMi PM* 10 01 00.6568762394 +31 55 25.213014837   6.02   4.9   G3VaHdel1 372 0
13 * 47 UMa PM* 10 59 27.9727514012 +40 25 48.920572724   5.66   4.7   G1-VFe-0.5 746 1
14 HD 107214 * 12 19 28.3538047272 +24 17 03.210646596   9.61 9.03     G0V 81 0
15 * 9 Com PM* 12 19 29.5258397040 +28 09 24.904524312   6.83   6.1   F8Va 196 0
16 HD 107583 * 12 21 49.0266762216 +26 32 56.750515116   9.89 9.31     G0V 86 0
17 HD 107611 * 12 21 56.1616739640 +27 18 34.236329472   8.95 8.50     F6V 99 0
18 HD 107793 SB* 12 23 08.3994739320 +25 51 04.947925896   9.64 9.09     F9V 101 0
19 HD 132142 PM* 14 55 11.0437420721 +53 40 49.246687828 8.95 8.59 7.80 7.13 6.69 K1V 228 0
20 HD 136028 * 15 18 26.1268629072 -00 27 40.443035364 9.22 7.40 5.89     K2/3III 49 0
21 * kap CrB PM* 15 51 13.9312943632 +35 39 26.573691158 6.69 5.82 4.82 4.06 3.57 K1IVa 249 1
22 * chi Her PM* 15 52 40.5410491705 +42 27 05.462878877 5.19 5.19 4.62 4.14 3.82 F8VFe-2Hdel-1 490 0
23 * phi Ser PM* 15 57 14.5708375584 +14 24 52.132920192   6.677 5.530     K1IV 108 0
24 * rho CrB PM* 16 01 02.6604891411 +33 18 12.639472357   6.01   5.0   G0+VaFe-1 609 1
25 V* AT CrB BY* 16 06 29.5992526286 +38 37 56.065088402   9.57   8.0   K3V 115 0
26 HD 145148 PM* 16 09 11.2150771435 +06 22 43.289900623   6.97   5.3   K1.5IV 168 0
27 HD 148816 PM* 16 30 28.4586254384 +04 10 41.602836534 7.75 7.81 7.28 6.82 6.49 F7V 297 0
28 * zet Ser PM* 18 00 29.0113725 -03 41 24.968552   4.982 4.616     F2V 185 0
29 HD 180928 PM* 19 19 00.0959552544 -15 32 11.647331124 9.06 7.49 6.06 4.94 4.11 K4III 93 0
30 * d Cyg PM* 19 50 37.7235287221 +52 59 16.790345304 7.84 6.31 5.03     K3IIICN2 172 0
31 * 11 Aqr PM* 21 00 33.8408325744 -04 43 48.934668864   6.819 6.192     G1V 197 0
32 * tet Aqr PM* 22 16 50.0366846016 -07 46 59.839473115 5.95 5.15 4.16 3.46 2.98 G9II 138 0
33 * ksi Peg PM* 22 46 41.5798542334 +12 10 22.388860108 4.66 4.69 4.20 3.73 3.42 F6V 373 0
34 HD 217877 PM* 23 03 57.2733595505 -04 47 41.501076410   7.26 6.68     G0-V 125 0
35 HD 219623 PM* 23 16 42.3035603040 +53 12 48.509346060   6.06   5.2   F8V 173 0

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2022.05.25-19:50:12

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