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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04922naa a2200601 4500 | |
| 001 | oai:research.chalmers.se:1177df2b-db56-412b-9276-1b2280388002 | |
| 003 | SwePub | |
| 008 | 171008s2015 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/2175662 URI |
| 024 | 7 | a https://doi.org/10.1051/0004-6361/2014250622 DOI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Gandolfi, D.u Istituto nazionale di astrofisica (INAF)4 aut |
| 245 | 1 0 | a Kepler-423b: a half-Jupiter mass planet transiting a very old solar-like star |
| 264 | c 2015-03-13 | |
| 264 | 1 | b EDP Sciences,c 2015 |
| 338 | a electronic2 rdacarrier | |
| 520 | a We report the spectroscopic confirmation of the Kepler object of interest KOI-183.01 (Kepler-423b), a half-Jupiter mass planet transiting an old solar-like star every 2.7 days. Our analysis is the first to combine the full Kepler photometry (quarters 1 17) with high-precision radial velocity measurements taken with the FIES spectrograph at the Nordic Optical Telescope. We simultaneously modelled the photometric and spectroscopic data-sets using Bayesian approach coupled with Markov chain Monte Carlo sampling. We found that the Kepler pre-search data conditioned light curve of Kepler-423 exhibits quarter-to-quarter systematic variations of the transit depth, with a peak-to-peak amplitude of similar to 4.3% and seasonal trends reoccurring every four quarters. We attributed these systematics to an incorrect assessment of the quarterly variation of the crowding metric. The host star Kepler-423 is a G4 dwarf with M-* = 0.85 +/- 0.04 M-circle dot, R-* = 0.95 +/- 0.04 R-circle dot, T-eff = 5560 +/- 80 K, [M/H] = -0.10 +/- 0.05 dex, and with an age of 11 +/- 2 Gyr. The planet Kepler-423b has a mass of M-p = 0.595 +/- 0.081 M-Jup and a radius of R-p = 1.192 +/- 0.052 R-Jup, yielding a planetary bulk density of rho(p) = 0.459 +/- 0.083 g cm(-3). The radius of Kepler-423b is consistent with both theoretical models for irradiated coreless giant planets and expectations based on empirical laws. The inclination of the stellar spin axis suggests that the system is aligned along the line of sight. We detected a tentative secondary eclipse of the planet at a 2 sigma confidence level (Delta F-ec = 14.2 +/- 6.6 ppm) and found that the orbit might have a small non-zero eccentricity of 0.019(-0.014)(+0.028) . With a Bond albedo of A(B) = 0.037 +/- 0.019, Kepler-423b is one of the gas-giant planets with the lowest albedo known so far. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a techniques: radial velocities | |
| 653 | a planets and satellites: detection | |
| 653 | a planets and satellites: individual: Kepler-423b | |
| 653 | a planets and satellites: fundamental parameters | |
| 653 | a techniques: photometric | |
| 653 | a stars: fundamental parameters | |
| 700 | 1 | a Parviainen, H.u University Of Oxford4 aut |
| 700 | 1 | a Deeg, H. J.u Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Lanza, A. F.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Fridlund, Malcolm,d 1952u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)malfri |
| 700 | 1 | a Moroni, P. G. P.u Universita di Pisa,University of Pisa4 aut |
| 700 | 1 | a Alonso, R.u Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna4 aut |
| 700 | 1 | a Augusteijn, T.4 aut |
| 700 | 1 | a Cabrera, J.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut |
| 700 | 1 | a Evans, T.u University Of Oxford4 aut |
| 700 | 1 | a Geier, S.4 aut |
| 700 | 1 | a Hatzes, A.4 aut |
| 700 | 1 | a Holczer, T.u Tel Aviv University4 aut |
| 700 | 1 | a Hoyer, S.u Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut |
| 700 | 1 | a Kangas, T.4 aut |
| 700 | 1 | a Mazeh, T.u Tel Aviv University4 aut |
| 700 | 1 | a Pagano, I.u Istituto nazionale di astrofisica (INAF)4 aut |
| 700 | 1 | a Tal-Or, L.u Tel Aviv University4 aut |
| 700 | 1 | a Tingley, B.u Århus Universitet,Aarhus University4 aut |
| 710 | 2 | a Istituto nazionale di astrofisica (INAF)b University Of Oxford4 org |
| 773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 576q 576x 0004-6361x 1432-0746 |
| 856 | 4 | u http://publications.lib.chalmers.se/records/fulltext/217566/local_217566.pdfx primaryx freey FULLTEXT |
| 856 | 4 | u https://www.aanda.org/articles/aa/pdf/2015/04/aa25062-14.pdf |
| 856 | 4 8 | u https://research.chalmers.se/publication/217566 |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361/201425062 |
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