2000A&AS..147..151R


Query : 2000A&AS..147..151R

2000A&AS..147..151R - Astron. Astrophys., Suppl. Ser., 147, 151-168 (2000/November-2)

Doppler imaging from artificial data. Testing the temperature inversion from spectral-line profiles.

RICE J.B. and STRASSMEIER K.G.

Abstract (from CDS):

We present extensive numerical tests of our temperature-based image reconstruction code TempMap. Two test cases that represent a rapidly-rotating low-inclination star and a moderately-rotating high-inclination star are used for the forward problem. Tests are then made to recover the original input map and include data errors and input-parameter errors. The former include variations of photon noise, continuum displacement, continuum slopes, scattered light in the spectrograph, and phase gaps with and without continuum information. The input-parameter tests include the confusion in the recovery of hot versus cool spots, uncertainties of atmospheric parameters such as radial-tangential macroturbulence and gravity, and the influence of line strength and line damping. In general, we find that the geometric information is less dependent on photon noise and on input errors than the temperature information. Our test inversions also show that, at the vsin i of these test cases, no significant gain in image quality is achieved once S/N of 300:1 is surpassed.

Abstract Copyright:

Journal keyword(s): stars: imaging - stars: activity - line: profiles - techniques: spectroscopic

Simbad objects: 5

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Number of rows : 5
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* XX Tri RS* 02 03 47.1141597864 +35 35 28.665702672   9.52 8.42     K0III 128 0
2 V* V410 Tau Or* 04 18 31.1081296680 +28 27 16.155955728   12.13 10.75 8.45 9.408 K3Ve 464 0
3 HD 283572 Or* 04 21 58.8484815456 +28 18 06.512641416   9.80 9.03 9.14   G5IVe 287 0
4 V* AB Dor TT* 05 28 44.8712165880 -65 26 55.199147208 8.259 7.856 6.999 6.496 5.993 K0V 1028 0
5 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 858 0

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