2019MNRAS.486..639K


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.31CEST16:06:29

2019MNRAS.486..639K - Mon. Not. R. Astron. Soc., 486, 639-654 (2019/June-2)

Kernel phase imaging with VLT/NACO: high-contrast detection of new candidate low-mass stellar companions at the diffraction limit.

KAMMERER J., IRELAND M.J., MARTINACHE F. and GIRARD J.H.

Abstract (from CDS):

Directly imaging exoplanets is challenging because quasi-static phase aberrations in the pupil plane (speckles) can mimic the signal of a companion at small angular separations. Kernel phase, which is a generalization of closure phase (known from sparse aperture masking), is independent of pupil plane phase noise to second order and allows for a robust calibration of full pupil, extreme adaptive optics observations. We applied kernel phase combined with a principal component based calibration process to a suitable but not optimal, high cadence, pupil stabilized L'-band (3.8 µm) data set from the ESO archive. We detect eight low-mass companions, five of which were previously unknown, and two have angular separations of ∼0.8-1.2 λ/D (i.e. ∼80-110 mas), demonstrating that kernel phase achieves a resolution below the classical diffraction limit of a telescope. While we reach a 5σ contrast limit of ∼1/100 at such angular separations, we demonstrate that an optimized observing strategy with more diversity of PSF references (e.g. star-hopping sequences) would have led to a better calibration and even better performance. As such, kernel phase is a promising technique for achieving the best possible resolution with future space-based telescopes (e.g. James Webb Space Telescope), which are limited by the mirror size rather than atmospheric turbulence, and with a dedicated calibration process also for extreme adaptive optics facilities from the ground.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): planets and satellites: detection - planets and satellites: formation - techniques: high angular resolution - techniques: image processing - techniques: interferometric - binaries: close

Status at CDS:  

Simbad objects: 44

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Number of rows : 44

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 3821 ** 00 40 47.48277 -07 13 57.3771           G1V+K5V 68 0
2 CD-49 451 PM* 01 37 20.8203351149 -49 11 44.376600790 13.074 11.834 10.391 9.481 8.555 M0V 38 0
3 * ksi02 Cet * 02 28 09.5570589539 +08 27 36.216809306 4.14 4.25 4.30 4.29 4.34 B9III 306 0
4 HD 17250 ** 02 46 14.6091954204 +05 35 33.325908330   8.40 7.88     F8 37 0
5 HD 17438 Pe* 02 47 11.1062546112 -22 29 08.679921822   6.844 6.461     F5V_Fe-1.2_CH-0.8 39 0
6 HD 18599 PM* 02 57 02.9515746463 -56 11 31.513992939   9.87 8.99     K2Vk: 19 0
7 CD-28 1030 Fl* 03 07 55.7522689086 -28 13 10.963771909 12.755 11.716 10.291 9.365 8.372 M1Ve 52 1
8 HD 28287 PM* 04 26 38.6009541197 -28 57 07.268184437   9.62 8.77   7.92 G9.5Vk: 26 0
9 EM* LkCa 15 TT* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 540 1
10 HD 31026 Ro* 04 50 35.4419712748 -41 02 50.837844036   9.66 8.922   8.058 G9V 20 0
11 HD 32309 * 05 01 25.5811681311 -20 03 06.905378229   4.838 4.885     B9V 68 0
12 BD-02 2198 PM* 07 36 07.0798477777 -03 06 38.791356409 12.551 11.347 9.871 8.925 7.891 M1.0V 36 0
13 HD 63581 PM* 07 46 14.8430539140 -59 48 50.634602772   8.92 8.14     K0IV-V(k) 34 0
14 HD 63608 PM* 07 46 16.9608861560 -59 48 34.194570827   9.06 8.23     K0IV-V(k) 46 0
15 BD-08 2582 PM* 09 06 45.3496829393 -08 48 24.611745266 12.184 10.928 9.478 8.564 7.653 K7V 68 0
16 CD-40 5404 ** 09 39 46.3688775322 -41 04 03.201224127 13.395 12.215 10.694 9.617 8.231 M3V 92 0
17 MCC 124 BY* 10 14 19.1632274905 +21 04 29.817290641 12.667 11.451 10.083 9.155 8.250 M0.7V 101 1
18 HIP 55052 PM* 11 16 06.7901844250 -30 10 41.390963458   11.67 10.38 9.77   K7Vk 16 1
19 HD 100546 Be* 11 33 25.4404858122 -70 11 41.239343121   6.71 6.30   6.64 A0VaekB8_lB 636 1
20 HD 102982 WU* 11 51 09.0998412972 -51 52 32.517381238   8.98 8.34   7.624 G3V 21 0
21 HD 103381 Ro* 11 54 05.3285145469 -29 58 57.110732077   9.18 8.460   7.664 G7V 19 0
22 HD 103743 PM* 11 56 43.7784001294 -32 16 02.692044633   8.48 7.81     G4V 47 1
23 * del Crv B PM* 12 29 50.8907908157 -16 31 15.206614589 10.13 9.38 8.43     K1 30 0
24 HD 110058 * 12 39 46.1959400684 -49 11 55.552264268   8.12 7.97     A0V 55 0
25 HD 110108 * 12 40 00.0864815468 -17 41 03.663417156   9.21 8.60     G3V 14 0
26 HD 113414 PM* 13 03 39.0100223674 -16 20 11.670476443   8.31 7.74     F7/8V 20 0
27 HD 123058 PM* 14 07 29.2912915339 -61 33 44.195042627   8.16 7.74     F3/5V 34 0
28 V* V1032 Cen TT* 14 08 10.1545137760 -41 23 52.576649494     12.199   10.506 K7IVe 97 0
29 HD 129679 PM* 14 44 16.8217750360 -11 37 02.452450023   8.97 8.37     G3V 18 0
30 HD 143928 PM* 16 04 36.8154241724 -37 51 46.611888915   6.282 5.901     F5VFe-0.8 37 0
31 CD-46 10694 Ro* 16 23 35.5955706082 -46 31 45.801299826   11.24 9.96   8.468 K0IIe 4 0
32 HD 314741 PM* 17 54 54.1222793138 -26 49 41.679980795   11.46 10.28     K5Ve 6 0
33 HD 347929 Ro* 18 07 24.1177299995 +19 42 22.909415594   10.18 9.099 8.55 7.664 K0 11 1
34 HD 169142 Ae* 18 24 29.7799676975 -29 46 49.328597698   8.42 8.16     F1VekA3mA3_lB? 319 2
35 HD 169178 PM* 18 24 50.5676626607 -34 11 26.086499954   9.79 8.94     K0V 15 0
36 Ross 154 Fl* 18 49 49.3638007809 -23 50 10.453568573 13.528 12.235 10.495 9.278 7.703 M3.5Ve 321 0
37 HD 178076B PM* 19 08 31.3619837655 -30 58 28.924079091   10.97 10.04     K5V 5 0
38 HD 178076 ** 19 08 31.72930 -30 58 21.5373           G8V+K5V 24 1
39 * gam Gru PM* 21 53 55.7261962 -37 21 53.478974 2.52 2.89 3.01 3.06 3.12 B8IV-Vs 125 0
40 CD-69 2101 PM* 23 31 00.7880434148 -69 05 10.840168052   9.89 8.98     K3V 12 0
41 HD 221451 PM* 23 32 19.1613449971 -13 37 18.451398671   9.28 8.64     G8V 12 0
42 * bet Scl PM* 23 32 58.2589788 -37 49 05.757000 3.92 4.28 4.37 4.37 4.44 B9.5IIIpHgMnSi 164 0
43 HD 221575 PM* 23 33 23.8260524192 -12 39 52.624760045   9.71 8.78     K2V 26 0
44 BD+00 5017 ** 23 35 00.2769821069 +01 36 19.433847921 12.082 10.893 9.546 8.703 7.879 K7V 128 0

    Equat.    Gal    SGal    Ecl

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2020.03.31-16:06:29

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