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- ID:
- ivo://CDS.VizieR/J/A+A/491/889
- Title:
- CoRoT-Exo-3b observations
- Short Name:
- J/A+A/491/889
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The CoRoT space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months. The discovery and characterization of the first very massive transiting planetary companion with a short orbital period is reported. A series of 34 transits was detected in the CoRoT light curve of an F3V star, observed from May to October 2007 for 152 days. The radius was accurately determined and the mass derived for this new transiting, thanks to the combined analysis of the light curve and complementary ground-based observations: high-precision radial-velocity measurements, on-off photometry, and high signal-to-noise spectroscopic observations.
- ID:
- ivo://CDS.VizieR/J/A+A/479/865
- Title:
- CoRoT exoplanet candidates
- Short Name:
- J/A+A/479/865
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The discovery of the short-period giant exoplanet population, the so-called hot Jupiter population, and their link to brown dwarfs and low-mass stars challenges the conventional view of planet formation and evolution. We took advantage of the multi-fiber facilities GIRAFFE and UVES/FLAMES (VLT) to perform the first large radial velocity survey using a multi-fiber spectrograph to detect planetary, brown-dwarf candidates and binary stars. We observed 816 stars during 5 consecutive half-nights. These stars were selected within one of the exoplanet fields of the space mission CoRoT.
- ID:
- ivo://CDS.VizieR/J/A+A/523/A91
- Title:
- CoRoT/Exoplanet fields with MATISSE
- Short Name:
- J/A+A/523/A91
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The homogeneous spectroscopic determination of the stellar parameters is a mandatory step for transit detections from space. Knowledge of which population the planet hosting stars belong to places constraints on the formation and evolution of exoplanetary systems. We used the FLAMES/GIRAFFE multi-fiber instrument at ESO to spectroscopically observe samples of stars in three CoRoT/Exoplanet fields, namely the LRa01, LRc01, and SRc01 fields, and characterize their stellar populations. We present accurate atmospheric parameters, Teff, logg, [M/H], and [alpha/Fe] derived for 1227 stars in these fields using the MATISSE algorithm. The latter is based on the spectral synthesis methodology and automatically provides stellar parameters for large samples of observed spectra. We trained and applied this algorithm to FLAMES observations covering the MgIb spectral range. It was calibrated on reference stars and tested on spectroscopic samples from other studies in the literature. The barycentric radial velocities and an estimate of the vsini values were measured using cross-correlation techniques. We corrected our samples in the LRc01 and LRa01 CoRoT fields for selection effects to characterize their FGK dwarf stars population, and compiled the first unbiased reference sample for the in-depth study of planet metallicity relationship in these CoRoT fields. We conclude that the FGK dwarf population in these fields mainly exhibit solar metallicity. We show that for transiting planet finding missions, the probability of finding planets as a function of metallicity could explain the number of planets found in the LRa01 and LRc01 CoRoT fields. This study demonstrates the potential of multi-fiber observations combined with an automated classifier such as MATISSE for massive spectral classification.
- ID:
- ivo://CDS.VizieR/J/A+A/565/A55
- Title:
- CoRoT 105906206 frequencies analysis
- Short Name:
- J/A+A/565/A55
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Eclipsing binary systems with pulsating components allow determination of several physical parameters of the stars, such as mass and radius, that can be used to constrain the modeling of stellar interiors and evolution when combined with the pulsation properties. We present the results of the study of CoRoT 105906206, an eclipsing binary system with a pulsating component located in the CoRoT LRc02 field. The analysis of the CoRoT light curve was complemented by high-resolution spectra from the Sandiford at McDonald Observatory and FEROS at ESO spectrographs, which revealed a double-lined spectroscopic binary. We used an iterative procedure to separate the pulsation-induced photometric variations from the eclipse signals. First, a Fourier analysis was used to identify the significant frequencies and amplitudes due to pulsations. Second, after removing the contribution of the pulsations from the light curve we applied the PIKAIA genetic-algorithm approach to derive the best parameters for describing the system orbital properties.
- ID:
- ivo://CDS.VizieR/J/A+A/556/A87
- Title:
- CoRoT-100866999 frequency analysis
- Short Name:
- J/A+A/556/A87
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The presence of g- and p-modes allows testing stellar models from the core to the envelope. Moreover, binarity in an eclipsing system constrains the physical parameters of the pulsating star. CoRot ID 100866999 is a relatively large-amplitude hybrid gamma Doradus-delta Scuti star with two clearly distinct frequency domains. The large number of detected frequencies allows a detailed study of the interaction between them. In addition, we can derive the fundamental parameters of both components from the study of the eclipsing light curve. After removing the eclipsing phases, we analyzed the data with the Period04 package up to a signal-to-noise ratio S/N=4. The light curve was then prewhitened with these oscillation frequencies to derive the fundamental parameters of the two components.
- ID:
- ivo://CDS.VizieR/J/A+A/528/A147
- Title:
- CoRoT 101155310 light curve
- Short Name:
- J/A+A/528/A147
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The continuous monitoring of ASAS 192647-0030.0=CoRoT 101155310 ensured from space by the CoRoT (Convection, Rotation and planetary Transits) mission allowed us to detect the fundamental radial mode f1=7.949c/d (with harmonics up to 10f1, and 12 independent terms. Linear combinations were also found and the light curve was solved by means of 61 frequencies (smallest amplitude 0.10mmag). The 22270 CoRoT measurements were performed in the chromatic mode. They span 152 d and cover 1208 consecutive cycles.
- ID:
- ivo://CDS.VizieR/J/A+A/552/A60
- Title:
- CoRoT 102918586 light curve and spectra
- Short Name:
- J/A+A/552/A60
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Pulsating stars in eclipsing binary systems are powerful tools to test stellar models. Binarity enables us to constrain the pulsating component physical parameters and this knowledge drastically improves the input physics for asteroseismic studies. The study of stellar oscillations then allows us to improve our understanding of stellar interiors and stellar evolution. The space mission CoRoT discovered several promising objects suitable for these studies. They were photometrically observed with unprecedented accuracy, but needed spectroscopic follow-up. A promising target was the relatively bright eclipsing system CoRoT 102918586, which turned out to be a double-lined spectroscopic binary and also showed clear evidence of Gamma Dor type pulsations. With the aim of combining the information from binarity and pulsation and fully exploiting the potential of CoRoT photometry we obtained phase resolved high-resolution spectroscopy with the Sandiford spectrograph at the McDonald 2.1m telescope and the FEROS spectrograph at the ESO 2.2m telescope. Spectroscopy yielded both the radial velocity curves and, after spectra disentangling, the component effective temperatures, metallicity, and line-of-sight projected rotational velocities. The CoRoT light curve was analyzed with an iterative procedure, devised to disentangle eclipses from pulsations. The eclipsing binary light curve analysis, combined with the spectroscopic results, provided an accurate determination of the system parameters, and the comparison with evolutionary models provided strict constraints on the system age. Finally, the residuals obtained after subtraction of the best fitting eclipsing binary model were analyzed to determine the pulsator properties. We achieved a complete and consistent description of the system. The primary star pulsates with typical gamma Dor frequencies and shows a splitting in period that is consistent with high order g-mode pulsations in a star of the corresponding physical parameters. The value of the splitting, in particular, is consistent with pulsations in l=1 modes.
- ID:
- ivo://CDS.VizieR/J/A+A/520/A108
- Title:
- CoRoT 101128793 light curves
- Short Name:
- J/A+A/520/A108
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The CoRoT (Convection, Rotation and planetary Transits) space mission provides a valuable opportunity to monitor stars with uninterrupted time sampling for up to 150 days at a time. The study of RR Lyrae stars, performed in the framework of the Additional Programmes belonging to the exoplanetary field, will particularly benefit from such dense, long-duration monitoring. We used the CoRoT data of the new RR Lyrae variable CoRoT 101128793 (f_0_=2.119c/d, P=0.4719296d) to provide us with more detailed observational facts to understand the physical process behind the Blazhko phenomenon. The CoRoT data were corrected for one jump and the long term drift. We detected 79 frequencies in the light curve of CoRoT 101128793. The timeseries presented here can be used to identify the main frequency f_0_, its harmonics, the terms related to the Blazhko frequency f_m, two independent terms, and several combination terms. All the 79 frequencies are listed in the file table1.dat. The times of maxima are listed in the file table2.dat.
- ID:
- ivo://CDS.VizieR/J/A+A/527/A146
- Title:
- CoRoT 0105288363 light curves
- Short Name:
- J/A+A/527/A146
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The CoRoT - Convection Rotation and Planetary Transits - space mission provides a unique opportunity to monitor RR Lyrae stars with excellent time-sampling, unprecedented photometric precision, and a long time base of 150 days. The pulsation characteristics of RR Lyrae stars rely on robust physics, but we still lack a firm quantitative understanding of the physical mechanisms driving the Blazhko modulation and the long-term changes in their pulsation behavior. We use the high- precision space data of an unknown RR Lyrae star CoRoT ID 0105288363 observed during a second long run centered on the Galaxy -LRc02-, to improve our understanding of the pulsation properties of RR Lyrae stars.
