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| Query : 2007ApJ...656..474B |
2007ApJ...656..474B - Astrophys. J., 656, 474-482 (2007/February-2)
Photospheric and chromospheric active regions in four young solar-type stars.
BIAZZO K., FRASCA A., HENRY G.W., CATALANO S. and MARILLI E.
Abstract (from CDS):
We present a photometric and spectroscopic study of four G-K dwarfs, namely HD 166, ε Eri, χ1 Ori, and κ1 Cet. In three cases, we find a clear spatial association between photospheric and chromospheric active regions. For χ1 Ori we do not find appreciable variations of photospheric temperature or chromospheric Hα emission. We applied a spot/plage model to the observed rotational modulation of temperature and flux to derive spot/plage parameters and to reconstruct a rough ``three-dimensional'' map of the outer atmosphere of κ1 Cet, HD 166, and ε Eri.
Abstract Copyright: ∼
Journal keyword(s): Stars: Activity - Stars: Late-Type - Techniques: Photometric - Techniques: Spectroscopic
Simbad objects: 16
| Number of rows : 16 |
| 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 | HD 166 | BY* | 00 06 36.7840068588 | +29 01 17.412693890 | 6.82 | 6.07 | 5.6 | G8V | 392 | 0 | ||
| 2 | * 54 Psc | PM* | 00 39 21.8053928046 | +21 15 01.712899720 | 7.29 | 6.71 | 5.88 | 5.21 | 4.82 | K0.5V | 630 | 1 |
| 3 | * tau Cet | PM* | 01 44 04.0831371922 | -15 56 14.927607677 | 4.43 | 4.22 | 3.50 | 2.88 | 2.41 | G8V | 1354 | 1 |
| 4 | * kap01 Cet | BY* | 03 19 21.6964175772 | +03 22 12.714979884 | 5.71 | 5.52 | 4.85 | 4.27 | 3.91 | G5V | 948 | 0 |
| 5 | HD 21585 | HB* | 03 29 03.8034677328 | +03 14 55.338332424 | 7.20 | 6.42 | G6/8V | 31 | 0 | |||
| 6 | * eps Eri | BY* | 03 32 55.8444911587 | -09 27 29.739493865 | 5.19 | 4.61 | 3.73 | 3.00 | 2.54 | K2V | 2073 | 1 |
| 7 | * 10 Tau | PM* | 03 36 52.3837044168 | +00 24 05.992097829 | 5.23 | 5.15 | 4.30 | 4.09 | 3.77 | F9IV-V | 595 | 0 |
| 8 | V* OU Tau | Y*O | 03 45 32.9384507670 | +24 18 11.646082836 | 14.63 | 13.36 | 12.02 | K4V | 122 | 0 | ||
| 9 | Cl Melotte 22 | OpC | 03 46 38.0 | +24 10 41 | ~ | 3679 | 0 | |||||
| 10 | V* V816 Tau | BY* | 03 51 53.3859880635 | +24 23 13.082093440 | 13.67 | 12.69 | 11.54 | K0V | 97 | 0 | ||
| 11 | * 122 Tau | PM* | 05 37 03.7355706744 | +17 02 25.177772616 | 5.775 | 5.525 | F0V | 103 | 0 | |||
| 12 | * chi01 Ori | SB* | 05 54 22.9829893 | +20 16 34.222038 | 5.08 | 5.00 | 4.40 | 3.90 | 3.59 | G0V | 895 | 0 |
| 13 | * sig CrB | RS* | 16 14 40.85557 | +33 51 30.9497 | F6V+G0V | 508 | 0 | |||||
| 14 | V* HN Peg | BY* | 21 44 31.3299461136 | +14 46 18.983292600 | 6.16 | G0V+ | 561 | 0 | ||||
| 15 | * 51 Peg | PM* | 22 57 27.9804852576 | +20 46 07.797040104 | 6.39 | 6.16 | 5.46 | 4.97 | 4.61 | G2IV | 1216 | 1 |
| 16 | NAME Hyades Moving Group | MGr | ~ | ~ | ~ | 300 | 0 |
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