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Query : 2011MNRAS.415.2238G |
2011MNRAS.415.2238G - Mon. Not. R. Astron. Soc., 415, 2238-2244 (2011/August-2)
TX UMa: new orbit, spin rotation and chemical composition of components.
GLAZUNOVA L.V., MKRTICHIAN D.E. and ROSTOPCHIN S.I.
Abstract (from CDS):
TX UMa confirms the previous conclusion that the strong lines of the light elements (N, O, Mg) in the atmospheres of mass-accreting components in Algol-type systems are stronger and wider than in single stars of the same spectral class and luminosity. Stronger lines also imply higher elemental abundances than weak lines, but this can also be explained if the former have greater microturbulent velocities. We have suggested that such an excess enhancement of the strong lines may be explained in terms of a distended pseudo-atmosphere of the mass-accreting component, engendered by gas flowing in via the L1 Lagrange point.
We have found the chemical abundances of 12 elements in the atmosphere of the primary component of TX UMa. Si and Ni were found to show significant deficiencies while the abundance measures of C varied (within the uncertainties of the model atmosphere parameters) from solar to noticeably deficient. Other elements, including He, have solar abundance. The abundances of the secondary component are likely solar, as its spectrum is represented well by a synthetic spectrum with solar abundance and Teff= 5500 K and log g = 3.3.
Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS
Journal keyword(s): binaries: eclipsing - stars: abundances - stars: fundamental parameters - stars: individual: TX UMa
Simbad objects: 8
Number of rows : 8 |
N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | V* RZ Cas | EB* | 02 48 55.5102370536 | +69 38 03.441502644 | 6.40 | 6.26 | A3V | 456 | 0 | |||
2 | V* RW Mon | EB* | 06 34 45.8899582296 | +08 49 32.193932700 | 9.38 | 9.32 | B8V+G5IV | 109 | 1 | |||
3 | HD 50846 | EB* | 06 54 54.7081653504 | -01 22 32.850081768 | 8.46 | 8.43 | B5/7Ib | 149 | 0 | |||
4 | V* R CMa | EB* | 07 19 28.1785241208 | -16 23 42.895279824 | 6.09 | 6.05 | 5.70 | F2III/IV | 282 | 0 | ||
5 | V* RY Gem | EB* | 07 27 24.1728227544 | +15 39 34.699185396 | 8.88 | 8.68 | A0V:e+K0II | 145 | 0 | |||
6 | V* TX UMa | EB* | 10 45 20.5041244512 | +45 33 58.708181052 | 6.99 | 6.98 | B8V+G0III-IV | 282 | 0 | |||
7 | HD 139319 | EB* | 15 33 51.05705 | +63 54 25.6950 | ~ | 239 | 0 | |||||
8 | HD 139319A | SB* | 15 33 51.0591158448 | +63 54 25.708209264 | 7.75 | 7.46 | A5m | 247 | 0 |
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