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http://hdl.handle.net/20.500.12386/31631
Title: | The GAPS Programme at TNG. XXIX. No detection of reflected light from 51 Peg b using optical high-resolution spectroscopy | Authors: | SCANDARIATO, GAETANO BORSA, Francesco SICILIA, Daniela Malavolta, L. BIAZZO, Katia BONOMO, ALDO STEFANO BRUNO, GIOVANNI CLAUDI, Riccardo COVINO, Elvira DI MARCANTONIO, Paolo Esposito, M. FRUSTAGLI, GIUSEPPE LANZA, Antonino Francesco MALDONADO PRADO, Jesus MAGGIO, Antonio Mancini, L. MICELA, Giuseppina Nardiello, D. RAINER, Monica SINGH, VIKASH SOZZETTI, Alessandro AFFER, Laura BENATTI, SERENA BIGNAMINI, ANDREA BILIOTTI, Valdemaro Capuzzo-Dolcetta, R. Carleo, I. COSENTINO, Rosario Damasso, Mario DESIDERA, Silvano Garcia de Gurtubai, A. Ghedina, A. GIACOBBE, Paolo GIANI, Elisabetta Harutyunyan, A. Hernandez, N. Hernandez Diaz, M. KNAPIC, Cristina LETO, Giuseppe Martínez Fiorenzano, A. F. MOLINARI, Emilio Carlo NASCIMBENI, VALERIO PAGANO, Isabella Pedani, M. Piotto, G. PORETTI, Ennio Stoev, H. |
Issue Date: | 2021 | Journal: | ASTRONOMY & ASTROPHYSICS | Number: | 646 | First Page: | A159 | Abstract: | Context. The analysis of exoplanetary atmospheres by means of high-resolution spectroscopy is an expanding research field which provides information on the chemical composition, thermal structure, atmospheric dynamics, and orbital velocity of exoplanets. <BR /> Aims: In this work, we aim to detect the light reflected by the exoplanet 51 Peg b by employing optical high-resolution spectroscopy. <BR /> Methods: To detect the light reflected by the planetary dayside, we used optical High Accuracy Radial velocity Planet Searcher and High Accuracy Radial velocity Planet Searcher for the Northern hemisphere spectra taken near the superior conjunction of the planet, when the flux contrast between the planet and the star is maximum. To search for the weak planetary signal, we cross-correlated the observed spectra with a high signal-to-noise ratio stellar spectrum. <BR /> Results: We homogeneously analyze the available datasets and derive a 10<SUP>-5</SUP> upper limit on the planet-to-star flux contrast in the optical. <BR /> Conclusions: The upper limit on the planet-to-star flux contrast of 10<SUP>-5</SUP> translates into a low albedo of the planetary atmosphere (A<SUB>g</SUB> ≲ 0.05-0.15 for an assumed planetary radius in the range of 1.5-0.9 R<SUB>Jup</SUB>, as estimated from the planet's mass). <P />Full Table 2 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/646/A159">http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/646/A159</A> <P />Based on observations made with the Italian Telescopio Nazionale Galileo (TNG) operated by the Fundación Galileo Galilei (FGG) of the Istituto Nazionale di Astrofisica (INAF) at the Observatorio del Roque de los Muchachos (La Palma, Canary Islands, Spain). | URI: | http://hdl.handle.net/20.500.12386/31631 | URL: | http://arxiv.org/abs/2012.10435v3 https://www.aanda.org/articles/aa/full_html/2021/02/aa39271-20/aa39271-20.html |
ISSN: | 0004-6361 | DOI: | 10.1051/0004-6361/202039271 | Bibcode ADS: | 2021A&A...646A.159S | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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aa39271-20.pdf | PDF editoriale | 810.63 kB | Adobe PDF | View/Open |
2012.10435.pdf | preprint | 735.89 kB | Adobe PDF | View/Open |
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