2014ApJ...795...12W


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET18:32:14

2014ApJ...795...12W - Astrophys. J., 795, 12 (2014/November-1)

Toward the detection of exoplanet transits with polarimetry.

WIKTOROWICZ S.J. and LAUGHLIN G.P.

Abstract (from CDS):

In contrast to photometric transits, whose peak signal occurs at mid-transit due to occultation of the brightest region of the disk, polarimetric transits provide a signal upon ingress and egress due to occultation of the polarized stellar limb. Limb polarization, the bright corollary to limb darkening, arises from the 90° scattering angle and low optical depth experienced by photons at the limb. In addition to the ratio Rp/R*, the amplitude of a polarimetric transit is expected to be controlled by the strength and width of the stellar limb polarization profile, which depend on the scattering-to-total opacity ratio at the stellar limb. We present a short list of the systems providing the highest expected signal-to-noise ratio for detection of this effect, and we draw particular attention to HD 80606b. This planet is spin/orbit misaligned, has a three-hour ingress, and has a bright parent star, which make it an attractive target. We report on test observations of an HD 80606b ingress with the POLISH2 polarimeter at the Lick Observatory Shane 3 m telescope. We conclude that unmodeled telescope systematic effects prevented polarimetric detection of this event. We outline a roadmap for further refinements of exoplanet polarimetry, whose eventual success will require a further factor of ten reduction in systematic noise.

Abstract Copyright:

Journal keyword(s): planets and satellites: general - planets and satellites: individual: HD 80606b - polarization - stars: atmospheres - stars: individual: HD 80606 - techniques: polarimetric

Simbad objects: 18

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Number of rows : 18

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 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1456 0
2 HD 15082b Pl 02 26 51.0582746497 +37 33 01.737746137           ~ 217 1
3 HD 15082 dS* 02 26 51.0582746497 +37 33 01.737746137   8.41 8.14     kA5hA8mF4 145 1
4 HD 17156b Pl 02 49 44.4866941172 +71 45 11.632197644           ~ 161 1
5 * bet Per EB* 03 08 10.1324535 +40 57 20.328013 1.70 2.07 2.12 2.08 2.11 B8V 1159 2
6 CD-30 1812b Pl 04 25 29.0168304676 -30 36 01.610961515           ~ 51 1
7 BD+06 1909b Pl 08 15 47.9805310385 +05 50 12.352063199           ~ 36 1
8 HAT-P-13 * 08 39 31.8073600797 +47 21 07.275628863   11.15 10.42 10.40   G4 117 2
9 HAT-P-13b Pl 08 39 31.8073600797 +47 21 07.275628863           ~ 90 1
10 HD 80606 PM* 09 22 37.5769478105 +50 36 13.434928660   9.78 9.00     G5 291 2
11 HD 80606b Pl 09 22 37.5769478105 +50 36 13.434928660           ~ 282 1
12 HD 80607 PM* 09 22 39.7367015092 +50 36 13.952617706   9.937 9.070     G5 84 2
13 * alf Leo PM* 10 08 22.31099 +11 58 01.9516 0.88 1.24 1.40 1.37 1.47 B8IVn 815 1
14 CD-23 9677b Pl 11 01 35.8978900078 -23 51 38.384687448           ~ 34 1
15 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1153 1
16 HAT-P-17b Pl 21 38 08.7311406378 +30 29 19.445574063           ~ 60 1
17 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1550 1
18 NAME BD+37 4734Bb Pl 22 57 46.8443014981 +38 40 30.355384717           ~ 208 1

    Equat.    Gal    SGal    Ecl

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