2000A&AS..146..103M


Query : 2000A&AS..146..103M

2000A&AS..146..103M - Astron. Astrophys., Suppl. Ser., 146, 103-140 (2000/October-1)

Multiwavelength optical observations of chromospherically active binary systems. III. High resolution echelle spectra from Ca II H & K to Ca II IRT.

MONTES D., FERNANDEZ-FIGUEROA M.J., DE CASTRO E., CORNIDE M., LATORRE A. and SANZ-FORCADA J.

Abstract (from CDS):

This is the third paper of a series aimed at studying the chromosphere of active binary systems using the information provided for several optical spectroscopic features. High resolution echelle spectra including all the optical chromospheric activity indicators from the Ca II H & K to Ca II IRT lines are analysed here for 16 systems. The chromospheric contribution in these lines has been determined using the spectral subtraction technique. Very broad wings have been found in the subtracted Hα profile of the very active star HU Vir. These profiles are well matched using a two-component Gaussian fit (narrow and broad) and the broad component can be interpreted as arising from microflaring. Red-shifted absorption features in the Hα line have been detected in several systems and excess emission in the blue wing of FG UMa was also detected. These features indicate that several dynamical processes, or a combination of them, may be involved. Using the E/E ratio as a diagnostic we have detected prominence-like extended material viewed off the limb in many stars of the sample, and prominences viewed against the disk at some orbital phases in the dwarfs OU Gem and BF Lyn. The He I D3 line has been detected as an absorption feature in mainly all the giants of the sample. Total filling-in of the He I D3, probably due to microflaring activity, is observed in HU Vir. Self-absorption with red asymmetry is detected in the Ca II H & K lines of the giants 12 Cam, FG UMa and BM CVn. All the stars analysed show clear filled-in Ca II IRT lines or even notable emission reversal. The small values of the E8542/E8498 ratio we have found indicate Ca II IRT emission arises from plage-like regions. Orbital phase modulation of the chromospheric emission has been detected in some systems, in the case of HU Vir evidence of an active longitude area has been found.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: binaries: close - stars: binaries: spectroscopic - stars: chromospheres - stars: late-type

VizieR on-line data: <Available at CDS (J/A+AS/146/103): stars.dat table3.dat table5.dat table6.dat table7.dat>

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 54 Psc PM* 00 39 21.8055114029 +21 15 01.716052732 7.29 6.71 5.88 5.21 4.82 K0.5V 543 1
2 V* UX Ari RS* 03 26 35.3764089427 +28 42 54.211100955 7.76 7.28 6.37     K0IV 669 0
3 * alf Tau LP? 04 35 55.23907 +16 30 33.4885 4.32 2.40 0.86 -0.37 -1.31 K5+III 1205 1
4 HD 32147 PM* 05 00 48.9991346145 -05 45 13.220341956 8.27 7.27 6.21 5.36 4.87 K3+V 425 1
5 * 12 Cam RS* 05 06 12.1360892121 +59 01 16.826053743 8.110 7.260 6.130     K0IIIe 160 0
6 V* V1149 Ori RS* 05 41 26.7879828728 +03 46 40.929159334   7.96 6.82     K0III 86 0
7 HD 45088 BY* 06 26 10.2539732357 +18 45 24.784795160 8.402 7.74   6.2   K2Ve 231 0
8 * 6 Lyn PM* 06 30 47.1070542334 +58 09 45.480746151   6.798 5.855 6.95   K0.5IIIbFe0.5 110 1
9 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 456 0
10 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1069 1
11 V* BF Lyn BY* 09 22 25.9436108516 +40 12 03.806653234   8.62   7.1   K2.5Vke 119 0
12 V* IL Hya RS* 09 24 49.0137313673 -23 49 34.713618005   8.38 7.37     K2IV/Vp 163 0
13 V* FG UMa RS* 10 21 47.4614793407 +60 54 46.209819373   8.42 7.41     K0 31 0
14 V* LR Hya BY* 10 36 02.2113098431 -11 54 47.927751306   8.89 8.03     K1.5Vk: 68 0
15 V* HU Vir RS* 12 13 20.6903303051 -09 04 46.844857323   9.69 8.71   7.639 K1V 139 0
16 V* DK Dra RS* 12 15 41.4913707788 +72 33 04.305716292   7.43 6.30     K0+IIICH-1 164 0
17 HD 112859 RS* 12 59 03.8032711437 +47 09 05.135626552   9.51 8.69 8.70   G6V: 33 0
18 V* IS Vir RS* 13 06 26.0086694996 -04 50 45.301471255   9.50 8.432   7.175 K0III 49 1
19 V* BL CVn SB* 13 18 51.9423893660 +33 26 19.349712024   9.28 8.14 9.92   K1III 55 0
20 V* BM CVn RS* 13 21 32.2611024581 +38 52 49.518149269   8.56 7.36     K2III 80 0
21 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2193 0
22 V* MS Ser BY* 15 58 43.9455652992 +25 34 10.429994066   9.21 8.347   7.201 G/K:e 99 0

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2021.09.17-21:20:41

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