Search for signatures of reflected light from the exoplanet HD 189733b by the method of residual dynamical spectra

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Search for signatures of reflected light from the exoplanet HD 189733b by the method of residual dynamical spectra. / Valyavin, G. G.; Grauzhanina, A. O.; Galazutdinov, G. A.; Gadelshin, D. R.; Zhuchkov, R. Ya; Orlov, V. G.; Burlakova, T. E.; Valeev, A. F.; Kholtygin, A. F.; Rzaev, A. Kh; Mkrtichian, D. E.

In: Astrophysical Bulletin, Vol. 70, No. 4, 01.10.2015, p. 466-473.

Research output: Contribution to journal › Article › peer-review

Author

Valyavin, G. G. ; Grauzhanina, A. O. ; Galazutdinov, G. A. ; Gadelshin, D. R. ; Zhuchkov, R. Ya ; Orlov, V. G. ; Burlakova, T. E. ; Valeev, A. F. ; Kholtygin, A. F. ; Rzaev, A. Kh ; Mkrtichian, D. E. / Search for signatures of reflected light from the exoplanet HD 189733b by the method of residual dynamical spectra. In: Astrophysical Bulletin. 2015 ; Vol. 70, No. 4. pp. 466-473.

BibTeX

@article{4e565065ce5744df80933aab94df2d5a,

title = "Search for signatures of reflected light from the exoplanet HD 189733b by the method of residual dynamical spectra",

abstract = "The goal of the present study is the development and testing of a method for spectral detection of the light of host stars reflected from their exoplanets. The presented method is based on the analysis of dynamical spectra, which make it possible to obtain high signal-to-noise residual spectra after host star spectrum deduction. These residual spectra contain information on the light reflected from an exoplanet and on its albedo. The first results of such research for the exoplanet HD 189733b are presented in the paper. We obtained a series of a few dozens moderate-resolution spectra of the host star HD 189733. Individual spectra have a high signal-to-noise ratio (≈700) and cover a considerable part of the complete orbital cycle of the exoplanet. The use of the developed method allowed us to achieve a characteristic contrast of the reflected light detection at a level of 5 × 10−4 from the continuum. Investigation of the dynamic spectra with this characteristic value as a detection threshold has not revealed obvious evidence of the host star light reflected from the planet. Nevertheless, the obtained threshold is high, which demonstrates the necessity of the development of the method for the exoplanet monitoring studies.",

keywords = "planetary systems, planets and satellites: individual: HD 189733b",

author = "Valyavin, {G. G.} and Grauzhanina, {A. O.} and Galazutdinov, {G. A.} and Gadelshin, {D. R.} and Zhuchkov, {R. Ya} and Orlov, {V. G.} and Burlakova, {T. E.} and Valeev, {A. F.} and Kholtygin, {A. F.} and Rzaev, {A. Kh} and Mkrtichian, {D. E.}",

year = "2015",

month = oct,

day = "1",

doi = "10.1134/S1990341315040094",

language = "English",

volume = "70",

pages = "466--473",

journal = "Astrophysical Bulletin",

issn = "1990-3413",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "4",

}

RIS

TY - JOUR

T1 - Search for signatures of reflected light from the exoplanet HD 189733b by the method of residual dynamical spectra

AU - Valyavin, G. G.

AU - Grauzhanina, A. O.

AU - Galazutdinov, G. A.

AU - Gadelshin, D. R.

AU - Zhuchkov, R. Ya

AU - Orlov, V. G.

AU - Burlakova, T. E.

AU - Valeev, A. F.

AU - Kholtygin, A. F.

AU - Rzaev, A. Kh

AU - Mkrtichian, D. E.

PY - 2015/10/1

Y1 - 2015/10/1

N2 - The goal of the present study is the development and testing of a method for spectral detection of the light of host stars reflected from their exoplanets. The presented method is based on the analysis of dynamical spectra, which make it possible to obtain high signal-to-noise residual spectra after host star spectrum deduction. These residual spectra contain information on the light reflected from an exoplanet and on its albedo. The first results of such research for the exoplanet HD 189733b are presented in the paper. We obtained a series of a few dozens moderate-resolution spectra of the host star HD 189733. Individual spectra have a high signal-to-noise ratio (≈700) and cover a considerable part of the complete orbital cycle of the exoplanet. The use of the developed method allowed us to achieve a characteristic contrast of the reflected light detection at a level of 5 × 10−4 from the continuum. Investigation of the dynamic spectra with this characteristic value as a detection threshold has not revealed obvious evidence of the host star light reflected from the planet. Nevertheless, the obtained threshold is high, which demonstrates the necessity of the development of the method for the exoplanet monitoring studies.

AB - The goal of the present study is the development and testing of a method for spectral detection of the light of host stars reflected from their exoplanets. The presented method is based on the analysis of dynamical spectra, which make it possible to obtain high signal-to-noise residual spectra after host star spectrum deduction. These residual spectra contain information on the light reflected from an exoplanet and on its albedo. The first results of such research for the exoplanet HD 189733b are presented in the paper. We obtained a series of a few dozens moderate-resolution spectra of the host star HD 189733. Individual spectra have a high signal-to-noise ratio (≈700) and cover a considerable part of the complete orbital cycle of the exoplanet. The use of the developed method allowed us to achieve a characteristic contrast of the reflected light detection at a level of 5 × 10−4 from the continuum. Investigation of the dynamic spectra with this characteristic value as a detection threshold has not revealed obvious evidence of the host star light reflected from the planet. Nevertheless, the obtained threshold is high, which demonstrates the necessity of the development of the method for the exoplanet monitoring studies.

KW - planetary systems

KW - planets and satellites: individual: HD 189733b

UR - http://www.scopus.com/inward/record.url?scp=84947604994&partnerID=8YFLogxK

U2 - 10.1134/S1990341315040094

DO - 10.1134/S1990341315040094

M3 - Article

VL - 70

SP - 466

EP - 473

JO - Astrophysical Bulletin

JF - Astrophysical Bulletin

SN - 1990-3413

IS - 4

ER -

ID: 5810387