196 results on '"Maceroni, C."'
Search Results
2. KIC 3858884: a hybrid {\delta} Sct pulsator in a highly eccentric eclipsing binary
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Maceroni, C., Lehmann, H., da Silva, R., Montalbán, J., Lee, C. -U., Ak, H., Deshpande, R., Yakut, K., Debosscher, J., Guo, Z., Kim, S. -L., Lee, J. W., and Southworth, J.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
The analysis of eclipsing binaries containing non-radial pulsators allows: i) to combine two different and independent sources of information on the internal structure and evolutionary status of the components, and ii) to study the effects of tidal forces on pulsations. KIC 3858884 is a bright Kepler target whose light curve shows deep eclipses, complex pulsation patterns with pulsation frequencies typical of {\delta} Sct, and a highly eccentric orbit. We present the result of the analysis of Kepler photometry and of high resolution phaseresolved spectroscopy. Spectroscopy yielded both the radial velocity curves and, after spectral disentangling, the primary component effective temperature and metallicity, and line-of-sight projected rotational velocities. The Kepler light curve was analyzed with an iterative procedure devised to disentangle eclipses from pulsations which takes into account the visibility of the pulsating star during eclipses. The search for the best set of binary parameters was performed combining the synthetic light curve models with a genetic minimization algorithm, which yielded a robust and accurate determination of the system parameters. The binary components have very similar masses (1.88 and 1.86 Msun) and effective temperatures (6800 and 6600 K), but different radii (3.45 and 3.05 Rsun). The comparison with the theoretical models evidenced a somewhat different evolutionary status of the components and the need of introducing overshooting in the models. The pulsation analysis indicates a hybrid nature of the pulsating (secondary) component, the corresponding high order g-modes might be excited by an intrinsic mechanism or by tidal forces., Comment: 18 pages, 14 figures, accepted for publication on Astronomy & Astrophysics
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- 2014
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3. KIC 11285625: a double-lined spectroscopic binary with a gamma Dor pulsator discovered from Kepler space photometry
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Debosscher, J., Aerts, C., Tkachenko, A., Pavlovski, K., Maceroni, C., Kurtz, D., Beck, P. G., Bloemen, S., Degroote, P., Lombaert, R., and Southworth, J.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
We present the first binary modelling results for the pulsating eclipsing binary KIC 11285625, discovered by the Kepler mission. An automated method to disentangle the pulsation spectrum and the orbital variability in high quality light curves, was developed and applied. The goal was to obtain accurate orbital and component properties, in combination with essential information derived from spectroscopy. A binary model for KIC 11285625 was obtained, using a combined analysis of high-quality space-based Kepler light curves and ground-based high-resolution HERMES echelle spectra. The binary model was used to separate the pulsation characteristics from the orbital variability in the Kepler light curve in an iterative way. We used an automated procedure to perform this task, based on the JKTEBOP binary modelling code, and adapted codes for frequency analysis and prewhitening of periodic signals. Using a disentangling technique applied to the composite HERMES spectra, we obtained a higher signal-to-noise mean component spectrum for both the primary and the secondary. A model grid search method for fitting synthetic spectra was used for fundamental parameter determination for both components. Accurate orbital and component properties of KIC 11285625 were derived, and we have obtained the pulsation spectrum of the gamma Dor pulsator in the system. Detailed analysis of the pulsation spectrum revealed amplitude modulation on a time scale of a hundred days, and strong indications of frequency splittings at both the orbital frequency, and the rotational frequency derived from spectroscopy., Comment: Accepted for publication in A&A
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- 2013
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4. CoRoT 102918586: a Gamma Dor pulsator in a short period eccentric eclipsing binary
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Maceroni, C., Montalbán, J., Gandolfi, D., Pavlovski, K., and Rainer, M.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
Pulsating stars in eclipsing binary systems are powerful tools to test stellar models. Binarity enables to constrain the pulsating component physical parameters, whose knowledge drastically improves the input physics for asteroseismic studies. The study of stellar oscillations allows us, in its turn, to improve our understanding of stellar interiors and evolution. The space mission CoRoT discovered several promising objects suitable for these studies, which have been 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 showed, as well, clear evidence of Gamma Dor type pulsations. 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. We obtained an accurate determination of the system parameters, and by comparison with evolutionary models 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 quite complete and consistent description of the system. The primary star pulsates with typical {\gamma} Dor frequencies and shows a splitting in period which 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., Comment: 12 pages, 10 figures. Accepted for publication in Astronomy and Astrophysics
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- 2013
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5. HD 181068: A Red Giant in a Triply-Eclipsing Compact Hierarchical Triple System
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Derekas, A., Kiss, L. L., Borkovits, T., Huber, D., Lehmann, H., Southworth, J., Bedding, T. R., Balam, D., Hartmann, M., Hrudkova, M., Ireland, M. J., Kovacs, J., Mezo, Gy., Moor, A., Niemczura, E., Sarty, G. E., Szabo, Gy. M., Szabo, R., Telting, J. H., Tkachenko, A., Uytterhoeven, K., Benko, J. M., Bryson, S. T., Maestro, V., Simon, A. E., Stello, D., Schaefer, G., Aerts, C., Brummelaar, T. A. ten, De Cat, P., McAlister, H. A., Maceroni, C., Merand, A., Still, M., Sturmann, J., Sturmann, L., Turner, N., Tuthill, P. G., Christensen-Dalsgaard, J., Gilliland, R. L., Kjeldsen, H., Quintana, E. V., Tenenbaum, P., and Twicken, J. D.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
Hierarchical triple systems comprise a close binary and a more distant component. They are important for testing theories of star formation and of stellar evolution in the presence of nearby companions. We obtained 218 days of Kepler photometry of HD 181068 (magnitude of 7.1), supplemented by groundbased spectroscopy and interferometry, which show it to be a hierarchical triple with two types of mutual eclipses. The primary is a red giant that is in a 45-day orbit with a pair of red dwarfs in a close 0.9-day orbit. The red giant shows evidence for tidally-induced oscillations that are driven by the orbital motion of the close pair. HD 181068 is an ideal target for studies of dynamical evolution and testing tidal friction theories in hierarchical triple systems., Comment: 22 pages, including supporting on-line material. This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science Vol. 332 no. 6026 pp. 216-218 (8 April 2011), doi:10.1126/science.1201762. http://www.sciencemag.org/content/332/6026/216.full
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- 2012
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6. IV.3 The wealth of stellar variability
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Baudin, F., primary, Maceroni, C., additional, and Alencar, S. H. P., additional
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- 2020
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7. A new eclipsing binary system with a pulsating component detected by CoRoT
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Sokolovsky, K., Maceroni, C., Hareter, M., Damiani, C., Balaguer-Nunez, L., and Ribas, I.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
We report the discovery of CoRoT 102980178 (R.A.= 06:50:12.10, Dec.= -02:41:21.8, J2000) an Algol-type eclipsing binary system with a pulsating component (oEA). It was identified using a publicly available 55 day long monochromatic lightcurve from the CoRoT initial run dataset (exoplanet field). Eleven consecutive 1.26m deep total primary and the equal number of 0.25m deep secondary eclipses (at phase 0.50) were observed. The following light elements for the primary eclipse were derived: HJD_MinI= 2454139.0680 + 5.0548d x E. The lightcurve modeling leads to a semidetached configuration with the photometric mass ratio q=0.2 and orbital inclination i=85 deg. The out-of-eclipse lightcurve shows ellipsoidal variability and positive O'Connell effect as well as clear 0.01m pulsations with the dominating frequency of 2.75 c/d. The pulsations disappear during the primary eclipses, which indicates the primary (more massive) component to be the pulsating star. Careful frequency analysis reveals the second independent pulsation frequency of 0.21 c/d and numerous combinations of these frequencies with the binary orbital frequency and its harmonics. On the basis of the CoRoT lightcurve and ground based multicolor photometry, we favor classification of the pulsating component as a gamma Doradus type variable, however, classification as an SPB star cannot be excluded., Comment: 16 pages, 7 figures, 3 tables, accepted to Communications in Asteroseismology
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- 2010
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8. Eclipsing binaries with pulsating components: CoRoT 102918586
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Maceroni, C., Cardini, D., Damiani, C., Gandolfi, D., Debosscher, J., Hatzes, A., Guenther, E. W., and Aerts, C.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
We present the preliminary results of the study of an interesting target in the first CoRoT exo-planet field (IRa1): CoRoT 102918586. Its light curve presents additional variability on the top of the eclipses, whose pattern suggests multi- frequency pulsations. The high accuracy CoRoT light curve was analyzed by applying an iterative scheme, devised to disentangle the effect of eclipses from the oscillatory pattern. In addition to the CoRoT photometry we obtained low resolution spectroscopy with the AAOmega multi-fiber facility at the Anglo Australian Observatory, which yielded a spectral classification as F0 V and allowed us to infer a value of the primary star effective temperature. The Fourier analysis of the residuals, after subtraction of the binary light curve, gave 35 clear frequencies. The highest amplitude frequency, of 1.22 c/d, is in the expected range for both \gamma Dor and SPB pulsators, but the spectral classification favors the first hypothesis. Apart from a few multiples of the orbital period, most frequencies can be interpreted as rotational splitting of the main frequency (an l = 2 mode) and of its overtones., Comment: 4 pages, 4 figures, to be published in Astron. Nachr. (proceedings of Helas IV conference "Seismological challenges for stellar structure')
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- 2010
9. Discovery of a red giant with solar-like oscillations in an eclipsing binary system from Kepler space-based photometry
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Hekker, S., Debosscher, J., Huber, D., Hidas, M. G., De Ridder, J., Aerts, C., Stello, D., Bedding, T. R., Gilliland, R. L., Christensen-Dalsgaard, J., Brown, T. M., Kjeldsen, H., Borucki, W. J., Koch, D., Jenkins, J. M., Van Winckel, H., Beck, P. G., Blomme, J., Southworth, J., Pigulski, A., Chaplin, W. J., Elsworth, Y. P., Stevens, I. R., Dreizler, S., Kurtz, D. W., Maceroni, C., Cardini, D., Derekas, A., and Suran, M. D.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
Oscillating stars in binary systems are among the most interesting stellar laboratories, as these can provide information on the stellar parameters and stellar internal structures. Here we present a red giant with solar-like oscillations in an eclipsing binary observed with the NASA Kepler satellite. We compute stellar parameters of the red giant from spectra and the asteroseismic mass and radius from the oscillations. Although only one eclipse has been observed so far, we can already determine that the secondary is a main-sequence F star in an eccentric orbit with a semi-major axis larger than 0.5 AU and orbital period longer than 75 days., Comment: Letter accepted for publication in ApJ
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- 2010
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10. HD 174884: a strongly eccentric, short-period early-type binary system discovered by CoRoT
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Maceroni, C., Montalban, J., Michel, E., Harmanec, P., Prsa, A., Briquet, M., Niemczura, E., Morel, T., Ladjal, D., Auvergne, M., Baglin, A., Baudin, F., Catala, C., Samadi, R., and Aerts, C.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
Accurate photometric CoRoT space observations of a secondary seismological target, HD 174884, led to the discovery that this star is an astrophysically important double-lined eclipsing spectroscopic binary in an eccentric orbit (e of about 0.3), unusual for its short (3.65705d) orbital period. The high eccentricity, coupled with the orientation of the binary orbit in space, explains the very unusual observed light curve with strongly unequal primary and secondary eclipses having the depth ratio of 1-to-100 in the CoRoT 'seismo' passband. Without the high accuracy of the CoRoT photometry, the secondary eclipse, 1.5 mmag deep, would have gone unnoticed. A spectroscopic follow-up program provided 45 high dispersion spectra. The analysis of the CoRoT light curve was performed with an adapted version of PHOEBE that supports CoRoT passbands. The final solution was obtained by simultaneous fitting of the light and the radial velocity curves. Individual star spectra were derived by spectrum disentangling. The uncertainties of the fit were derived by bootstrap resampling and the solution uniqueness was tested by heuristic scanning. The results provide a consistent picture of the system composed of two late B stars. The Fourier analysis of the light curve fit residuals yields two components, with orbital frequency multiples and an amplitude of about 0.1 mmag, which are tentatively interpreted as tidally induced pulsations. An extensive comparison with theoretical models is carried out by means of the Levenberg-Marquardt minimization technique and the discrepancy between models and the derived parameters is discussed. The best fitting models yield a young system age of 125 million years which is consistent with the eccentric orbit and synchronous component rotation at periastron., Comment: 15 pages, 12 figures. Accepted for publication by A&A
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- 2009
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11. CoRoT photometry and high-resolution spectroscopy of the interacting eclipsing binary AU Mon
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Desmet, M., Fr'emat, Y., Baudin, F., Harmanec, P., Lampens, P., Pacheco, E. Janot, Briquet, M., Degroote, P., Neiner, C., Mathias, P., Poretti, E., Rainer, M., Uytterhoeven, K., Amado, P. J., Valtier, J. -C., Prsa, A., Maceroni, C., and Aerts, C.
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Astrophysics - Solar and Stellar Astrophysics - Abstract
Analyses of very accurate CoRoT space photometry, past Johnson V photoelectric photometry and high-resolution \'echelle spectra led to the determination of improved and consistent fundamental stellar properties of both components of AU Mon. We derived new, accurate ephemerides for both the orbital motion (with a period of 11.113d) and the long-term, overall brightness variation (with a period of 416.9d) of this strongly interacting Be + G semi-detached binary. It is shown that this long-term variation must be due to attenuation of the total light by some variable circumbinary material. We derived the binary mass ratio $M_{\rm G}/M_{\rm B}$ = 0.17\p0.03 based on the assumption that the G-type secondary fills its Roche lobe and rotates synchronously. Using this value of the mass ratio as well as the radial velocities of the G-star, we obtained a consistent light curve model and improved estimates of the stellar masses, radii, luminosities and effective temperatures. We demonstrate that the observed lines of the B-type primary may not be of photospheric origin. We also discover rapid and periodic light changes visible in the high-quality residual CoRoT light curves. AU Mon is put into perspective by a comparison with known binaries exhibiting long-term cyclic light changes., Comment: Accepted for publication in MNRAS
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- 2009
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12. The asteroseismic ground-based observational counterpart of CoRoT
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Uytterhoeven, K., Poretti, E., Mathias, P., Amado, P. J., Rainer, M., Martin-Ruiz, S., Rodriguez, E., Paparo, M., Pollard, K., Maceroni, C., Balaguer-Nunoz, L., Ribas, I., Catala, C., Neiner, C., Garcia, R. A., and Group, the CoRoT/SWG Ground-based Observations Working
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Astrophysics - Solar and Stellar Astrophysics - Abstract
We present different aspects of the ground-based observational counterpart of the CoRoT satellite mission. We give an overview of the selected asteroseismic targets, the numerous instruments and observatories involved, and the first scientific results., Comment: 3 pages, 2 tables, 1 figure, to be published in the conference proceedings 'Stellar Pulsation: Challenges for Theory and Observation' (31 May - 5 June, Santa Fe, New Mexico, US), publishers: American Institute of Physics
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- 2009
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13. CoRoT's view of newly discovered B-star pulsators: results for 358 candidate B pulsators from the initial run's exoplanet field data
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Degroote, P., Aerts, C., Ollivier, M., Miglio, A., Debosscher, J., Cuypers, J., Briquet, M., Montalban, J., Thoul, A., Noels, A., De Cat, P., Balaguer-Nunez, L., Maceroni, C., Ribas, I., Auvergne, M., Baglin, A., Deleuil, M., Weiss, W., Jorda, L., Baudin, F., and Samadi, R.
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
We search for new variable B-type pulsators in the CoRoT data assembled primarily for planet detection, as part of CoRoT's Additional Programme. We aim to explore the properties of newly discovered B-type pulsators from the uninterrupted CoRoT space-based photometry and to compare them with known members of the Beta Cep and slowly pulsating B star (SPB) classes. We developed automated data analysis tools that include algorithms for jump correction, light-curve detrending, frequency detection, frequency combination search, and for frequency and period spacing searches. Besides numerous new, classical, slowly pulsating B stars, we find evidence for a new class of low-amplitude B-type pulsators between the SPB and Delta Sct instability strips, with a very broad range of frequencies and low amplitudes, as well as several slowly pulsating B stars with residual excess power at frequencies typically a factor three above their expected g-mode frequencies. The frequency data we obtained for numerous new B-type pulsators represent an appropriate starting point for further theoretical analyses of these stars, once their effective temperature, gravity, rotation velocity, and abundances will be derived spectroscopically in the framework of an ongoing FLAMES survey at the VLT., Comment: 22 pages, 30 figures, accepted for publication in A&A
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- 2009
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14. 12 Bootis: the need for asteroseismic constraints
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Miglio, A., Montalban, J., Maceroni, C., De Ridder, J., and D'Antona, F.
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Astrophysics - Abstract
12 Bootis is a double-lined spectroscopic binary whose orbit has been resolved by interferometry. We present a detailed modelling of the system and show that the available observational constraints can be reproduced by models at different evolutionary stages, depending on the details of extra-mixing processes acting in the central regions. In order to discriminate among these theoretical scenarios, additional and independent observational constraints are needed: we show that these could be provided by solar-like oscillations, that are expected to be excited in both system components., Comment: 4 pages, to appear in the proceedings of SoHO18/GONG2006/HelAsI, Sheffield August 2006
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- 2006
15. CoRoT and the search for exoplanets. The Italian contribution
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Poretti, E., Lanza, A. F., Maceroni, C., Pagano, I., and Ripepi, V.
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Astrophysics - Abstract
The space mission CoRoT (COnvection, ROtation and planetary Transits) will offer the possibility to detect extrasolar planets by means of the transit method. The satellite will observe about 60000 targets in the range 11.0
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- 2006
16. 85Peg A: which age for a low metallicity solar like star?
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D'Antona, F., Cardini, D., Di Mauro, M. P., Maceroni, C., Mazzitelli, I., and Montalban, J.
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Astrophysics - Abstract
We explore the possible evolutionary status of the primary component of the binary 85 Pegasi, listed as a target for asteroseismic observations by the MOST satellite. In spite of the assessed `subdwarf' status, and of the accurate distance determination from the Hipparcos data, the uncertainties in the metallicity and age, coupled with the uncertainty in the theoretical models, lead to a range of predictions on the oscillation frequency spectrum. Nevertheless, the determination of the ratio between the small separation in frequency modes, and the large separation as suggested by Roxburgh (2004), provides a very good measure of the star age, quite independent of the metallicity in the assumed uncertainty range. In this range, the constraint on the dynamical mass and the further constraint provided by the assumption that the maximum age is 14 Gyr limit the mass of 85PegA to the range from 0.75 to 0.82Msun. This difference of a few hundreths of solar masses leads to well detectable differences both in the evolutionary stage (age) and in the asteroseismic properties. We show that the age determination which will be possible through the asteroseismic measurements for this star is independent either from the convection model adopted or from the microscopic metal diffusion. The latter conclusion is strengthened by the fact that, although metal diffusion is still described in an approximate way, recent observations suggest that the real stars suffer a smaller metal sedimentation with respect to the models., Comment: accepted for publication in the MNRAS
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- 2005
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17. Surface imaging of late-type contact binaries II: Halpha 6563 A emission in AE Phoenicis and YY Eridani
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Vilhu, O. and Maceroni, C.
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Astrophysics - Abstract
We present and discuss the Halpha (6563 A) observations of the contact (W UMa type) binaries AE Phoenicis and YY Eridani, obtaineded in 1989, 1990 and 1995 with the CAT/CES telescope of the Southern European Observatory (ESO). In particular, we compare the intrinsic equivalent widths of both components with the NextGen theoretical models and the saturation limit. We find that the average Halpha equivalent widths are close to the saturation border and that the primary components have excess Halpha-emission, indicating enhanced chromospheric activity. This is compatible with both theoretical and observational suggestions that the primary is the more magnetically active component and is filled with (mostly unresolvable) dark spots and associated chromospheric plages., Comment: 4 pages, 2 figures, submitted to A&A
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- 2005
18. A-type stars: evolution, rotation and binarity
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Noels, A., Montalban, J., and Maceroni, C.
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Astrophysics - Abstract
We discuss the internal structure of stars in the mass range 1.5 to 4 M_sun from the PMS to the subgiant phase with a particular emphasis on the convective core and the convective superficial layers. Different physical aspects are considered such as overshooting, treatment of convection, microscopic diffusion and rotation. Their influence on the internal structure and on the photospheric chemical abundances is briefly described. The role of binarity in determining the observed properties and as a tool to constrain the internal structure is also introduced and the current limits of theories of orbital evolution and of available binary data--sets are discussed. keywords{stars: evolution, stars: binaries: general, stars: rotation}, Comment: 11 pages, 7 figures, conference: The A-star Puzzle, IAU Simp. 224, 2004
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- 2004
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19. The shortest period M-dwarf eclipsing system BW3 V38, II: determination of absolute elements
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Maceroni, C. and Montalban, J.
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Astrophysics - Abstract
The spectroscopic data for the short-period (0.1984 d)eclipsing binary V38, discovered by the OGLE micro-lensing team in Baade's Window field BW3, are analyzed. Radial velocity curves are derived from mid-resolution spectra obtained with EMMI-NTT at ESO - La Silla, and a simultaneous solution of the existing light curve by OGLE and of the new radial velocity curves is obtained. The system is formed by almost twin M3e dwarf components that are very close, but not yet in contact. The spectra of both dwarfs show signatures of the presence of strong chromospheres. Spectroscopy definitely confirms, therefore, what was suggested on the basis of photometry: BW3 V38 is indeed a unique system, as no other similar binary with M components and in such a tight orbit is known. Within the limits posed by the relatively large errors, due to the combined effect of system faintness and of the constraints on exposure time, the derived physical parameters seem to agree with the relations obtained from the other few known eclipsing binaries with late type components (which indicate a discrepancy between the available evolutionary models and the data at ~ 10% level). A possible explanation is the presence of strong magnetic fields and fast rotation (that applies to the BW3 V38 case as well). A simple computation of the system secular evolution by angular momentum loss and spin orbit synchronization shows that the evolution of a system with M dwarfs components is rather slow, and indicates as well a possible reason why systems similar to BW3 V38 are so rare., Comment: 9 pages, 7 figures, 3 tables, accepted for publication in A&A
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- 2004
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20. Lithium during the AGB evolution in young open clusters of the Large Magellanic cloud
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Maceroni, C., testa, V., Plez, B., Lario, P. Garcia, and D'Antona, F.
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Astrophysics - Abstract
We present the results of mid-resolution spectroscopy in the LiI 6708 AA spectral region of Asymptotic Giant Branch (AGB) stars belonging to young open clusters of the Large Magellanic Cloud. Most stars belong to the clusters NGC 1866 and NGC 2031, which have an age of ~ 150 Myr. Lithium lines of different strength are detected in the spectra of stars evolving along the AGB, not always in agreement with theoretical predictions. We also analyze the infrared luminosities (ISOCAM data) of these stars, to discuss if their evolutionary phase precedes or follows the lithium production stage., Comment: 10 pages, 6 figures
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- 2002
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21. New pulsational properties of eight 'anomalous' RR Lyrae variables
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Clementini, G., Tosi, M., Bragaglia, A., Merighi, R., and Maceroni, C.
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Astrophysics - Abstract
CCD photometry in the V band is presented for 7 field RR Lyrae stars selected from a sample of eight variables which, according to data collected in the literature, are expected to be {\it ab}-type pulsators, to have short periods and hence high metallicity, and to be located at high {\it z} from the galactic plane. New periods and epochs are derived for them. The new periods are only slightly shorter than the values published on the last edition of the General Catalog of Variable Stars (GCVS4). Instead, in six cases our amplitude of the light variation is significantly smaller than that published on the GCVS4, and in at least three cases the actual pulsation appears to be in the first harmonic rather than in the fundamental mode. All the suggested {\it c}-type pulsators show variations in the amplitude and/or quite scattered light curves. Possible explanations are given. From a spectro-photometric analysis of the sample, only DL Com is confirmed to pulsate in the fundamental mode, to have short period, and to be located at relatively high {\it z}. A single object cannot be taken as evidence for a significant metal rich population at large distance from the galactic plane., Comment: 28 pages including text and tables, plain tex. Figures available through anonymous ftp at ftp://astbo3.bo.astro.it/pub/bap/files/ (get bap95-12-fig1.ps and bap95-12-figures.ps)
- Published
- 1995
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22. IV.3 The wealth of stellar variability
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Baudin, F., primary, Maceroni, C., additional, and Alencar, S. H. P., additional
- Published
- 2016
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23. HD 181068: A Red Giant in a Triply Eclipsing Compact Hierarchical Triple System
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Derekas, A., Kiss, L. L., Borkovits, T., Huber, D., Lehmann, H., Southworth, J., Bedding, T. R., Balam, D., Hartmann, M., Hrudkova, M., Ireland, M. J., Kovács, J., Mező, Gy., Moór, A., Niemczura, E., Sarty, G. E., Szabó, Gy. M., Szabó, R., Telting, J. H., Tkachenko, A., Uytterhoeven, K., Benkő, J. M., Bryson, S. T., Maestro, V., Simon, A. E., Stello, D., Schaefer, G., Aerts, C., Brummelaar, T. A. ten, De Cat, P., McAlister, H. A., Maceroni, C., Mérand, A., Still, M., Sturmann, J., Sturmann, L., Turner, N., Tuthill, P. G., Christensen-Dalsgaard, J., Gilliland, R. L., Kjeldsen, H., Quintana, E. V., Tenenbaum, P., and Twicken, J. D.
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- 2011
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24. Statistics of magnetic cycles in late-type single and close binary stars
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Maceroni, C., Bianchini, A., Rodonó, M., van't Veer, F., Vio, R., Araki, H., editor, Brézin, E., editor, Ehlers, J., editor, Frisch, U., editor, Hepp, K., editor, Jaffe, R. L., editor, Kippenhahn, R., editor, Weidenmüller, H. A., editor, Wess, J., editor, Zittartz, J., editor, Beiglböck, W., editor, Byrne, Patrick B., editor, and Mullan, Dermott J., editor
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- 1992
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25. CoRoT 102931335: a candidate γ Dor in an eclipsing binary
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Damiani, C., Maceroni, C., Cardini, D., Debosscher, J., Balaguer-Núñez, L., and Ribas, I.
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- 2010
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26. CoRoT 102931335: a candidate γ Dor in an eclipsing binary
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Damiani, C., primary, Maceroni, C., additional, Cardini, D., additional, Debosscher, J., additional, Balaguer-Núñez, L., additional, and Ribas, I., additional
- Published
- 2010
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27. Pulsations in close binaries: challenges and opportunities
- Author
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Maceroni C., Lehmann H., Da Silva R., and Montalbán J.
- Subjects
Physics ,QC1-999 - Abstract
CoRoT and Kepler provided a precious by-product: a number of eclipsing binaries containing variable stars and, among these, non-radial pulsators. This providential occurrence allows combining independent information from two different phenomena whose synergy yields scientific results well beyond those from the single sources. In particular, the analysis of pulsations in eclipsing binary components throws light on the internal structure of the pulsating star, on the system evolution, and on the role of tidal forces in exciting the oscillations. The case study of the Kepler target KIC 3858884 is illustrative of the difficulties of analysis and of the achievements in this rapidly developing field.
- Published
- 2015
- Full Text
- View/download PDF
28. LITHIUM ALONG THE AGB OF LMC CLUSTERS
- Author
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MACERONI, C., primary, TESTA, V., additional, D’ANTONA, F., additional, PLEZ, B., additional, and GARCIA LARIO, P., additional
- Published
- 2001
- Full Text
- View/download PDF
29. Statistics of magnetic cycles in late-type single and close binary stars
- Author
-
Maceroni, C., primary, Bianchini, A., additional, Rodonó, M., additional, van't Veer, F., additional, and Vio, R., additional
- Published
- 1992
- Full Text
- View/download PDF
30. A CoRoT View of the ζ Aur binary HR 6902
- Author
-
Maceroni, C., primary, Montalbán, J., additional, Da Silva, R., additional, Semaan, T., additional, Mosser, B., additional, Rainer, M., additional, Poretti, E., additional, and Griffin, E., additional
- Published
- 2017
- Full Text
- View/download PDF
31. Expected performance of the CoRoT planet search from light curve beauty contests
- Author
-
Moutou, C, Aigrain, S, Almenara, J, Alonso, R, Auvergne, M, Barge, P, Blouin, D, Borde, P, Cabrera, J, Carone, L, Cautain, R, Deeg, H, Erikson, A, Fressin, F, Guis, V, Leger, A, Guterman, P, Lrwin, M, Kabath, P, Lanza, A, Maceroni, C, Mazeh, T, Ollivier, M, Pont, F, and Paetzold, M
- Published
- 2016
32. Additional science potential for COROT
- Author
-
Weiss, W, Aerts, C, Aigrain, S, Alecian, G, Antonello, E, Baglin, A, Bazot, M, Collier-Cameron, A, Charpinet, S, Gamarova, A, Handler, G, Hatzes, A, Hubert, A, Lammer, H, Lebzelter, T, Maceroni, C, Marconi, M, de Martino, D, Janot-Pacheco, E, Pagano, I, Paunzen, E, Pinheiro, F, Poretti, E, Ribas, I, and Ripepi, V
- Abstract
Space experiments which are aiming towards astero-seismology and the detection of exoplanets, like COROT or MOST, Eddington and Kepler, are designed to deliver high precision photometric data. Obviously, the they can be used also for other purposes than the primary science goals and in addition many other targets can or will be automatically observed simultaneously with the primary targets. As a consequence, fascinating possibilities for additional (parallel, secondary) science projects emerge. For COROT a dedicated working group was thus established with the goal to contribute any useful information which may optimize the scientific output of the mission.
- Published
- 2016
33. Instability domains of delta Scuti and Slowly Pulsating B stars : How will the CoRoT satellite help to determine the limits ?
- Author
-
Lefèvre, L., Michel, E., Aerts, C.C., Kaiser, A., Neiner, C., Poretti, E., Garrido, R., Baglin, A., Auvergne, M., Catala, C., Weiss, W., Balaguer-Nunez, L., Maceroni, C., Ribas, I., Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Astronomie du LESIA, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Ingénieurs, Techniciens et Administratifs
- Subjects
Astronomy ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries) - Abstract
Contains fulltext : 76072.pdf (Publisher’s version ) (Open Access) 5 p.
- Published
- 2009
34. KIC 3858884: a hybrid �� Sct pulsator in a highly eccentric eclipsing binary
- Author
-
Maceroni, C., Lehmann, H., da Silva, R., Montalb��n, J., Lee, C. -U., Ak, H., Deshpande, R., Yakut, K., Debosscher, J., Guo, Z., Kim, S. -L., Lee, J. W., and Southworth, J.
- Subjects
Astrophysics::Solar and Stellar Astrophysics ,FOS: Physical sciences ,Astrophysics::Earth and Planetary Astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) - Abstract
The analysis of eclipsing binaries containing non-radial pulsators allows: i) to combine two different and independent sources of information on the internal structure and evolutionary status of the components, and ii) to study the effects of tidal forces on pulsations. KIC 3858884 is a bright Kepler target whose light curve shows deep eclipses, complex pulsation patterns with pulsation frequencies typical of �� Sct, and a highly eccentric orbit. We present the result of the analysis of Kepler photometry and of high resolution phaseresolved spectroscopy. Spectroscopy yielded both the radial velocity curves and, after spectral disentangling, the primary component effective temperature and metallicity, and line-of-sight projected rotational velocities. The Kepler light curve was analyzed with an iterative procedure devised to disentangle eclipses from pulsations which takes into account the visibility of the pulsating star during eclipses. The search for the best set of binary parameters was performed combining the synthetic light curve models with a genetic minimization algorithm, which yielded a robust and accurate determination of the system parameters. The binary components have very similar masses (1.88 and 1.86 Msun) and effective temperatures (6800 and 6600 K), but different radii (3.45 and 3.05 Rsun). The comparison with the theoretical models evidenced a somewhat different evolutionary status of the components and the need of introducing overshooting in the models. The pulsation analysis indicates a hybrid nature of the pulsating (secondary) component, the corresponding high order g-modes might be excited by an intrinsic mechanism or by tidal forces., 18 pages, 14 figures, accepted for publication on Astronomy & Astrophysics
- Published
- 2014
- Full Text
- View/download PDF
35. Five Years of Exoplanet Observations with the CoRoT Space Observatory
- Author
-
Deeg, H, Aigrain, S, Almenara, J, Alonso, R, Baglin, A, Barge, P, Bonomo, A, Borde, P, Bouchy, F, Bruntt, H, Carone, L, Carpano, S, Csizmadia, S, Deleuil, M, Diaz, R, Dvorak, R, Erikson, A, Ferraz-Mello, S, Fridlund, M, Gandolfi, D, Gillon, M, Guillot, T, Grziwa, M, Hatzes, A., Hebrard, G, Jorda, L, Lammer, H, Leger, A., Llebaria, A, Maceroni, C., Mazeh, T, Meunier, J, Moutou, C, Ofir, A, Ollivier, M, Parviainen, Hannu, Pätzold, M, Pont, F, Queloz, D, Rauer, H, Regulo, C, Renner, S, Rouan, D, Samuel, B, Santerne, A, Schneider, J., Tingley, B, Weingrill, J, Wuchterl, G, and Zucker, S
- Subjects
transit method ,extrasolar planets ,CoRoT - Published
- 2012
36. Bivalirudin use in patients with acute coronary sindrome treated with percutaneous coronary interventions through transradial approach
- Author
-
Porfirio, M, Sciahbasi, A, Pendenza, G, Romagnoli, E, Patrizi, R, Giannico, Mb, Lucci, V, Carlino, G, Di Napoli, L, Maceroni, C, Penco, M, and Lioy, E.
- Published
- 2011
37. CoRoT221656539 and CoRoT102327039: two low-mass binary systems in the CoRoT field
- Author
-
Gandolfi, D, Maceroni, C., Cabrera, J, Hatzes, A., Fridlund, M, Magali, D, Montalbán, J., Santerne, A, and damiani, C
- Subjects
COROT ,Transitmethode ,Binärsterne - Published
- 2011
38. A new eclipsing binary system with a pulsating component detected by CoRoT. Veröffentlichungen der Kommission für Astronomie|Communications in Asteroseismology|Communications in Asteroseismology 161 161
- Author
-
Damiani, C., Maceroni, C., Sokolovsky, K., Balaguer-Núñez, L., and Hareter, M.
- Subjects
Mathematics, Physics and Space Research - Published
- 2010
39. Discovery of New Hot Pulsators in the CoRoT Exoplanet Database and Their Potential for Asteroseismology
- Author
-
Aerts, C., Debosscher, J., Sarro, L., Degroote, P., Neiner, C., Maceroni, C., Ribas, I., Auvergne, M., Deleuil, M., Ollivier, M., Jorda, L., Samadi, R., Aerts, Debosscher, Sarro, Degroote, Neiner, Maceroni, Ribas, Auvergne, Deleuil, Ollivier, Jorda, and Samadi
- Published
- 2009
40. VizieR Online Data Catalog: Supervised classification of CoRoT variables (Debosscher+, 2009)
- Author
-
Debosscher, J., Sarro, L.~m., Lopez, M., Deleuil, M., Aerts, C., Auvergne, M., Baglin, A., Baudin, F., Chadid, M., Charpinet, S., Cuypers, J., de Ridder, J., Garrido, R., Hubert, A.~m., Janot-Pacheco, E., Jorda, L., Kaiser, Andreas, Kallinger, T., Kollath, Z., Maceroni, C., Mathias, P., Michel, E., Moutou, C., Neiner, C., Ollivier, M., Samadi, R., Solano, E., Surace, C., Vandenbussche, B., Weiss, W.~w., Institute of Astronomy [Leuven], Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Instituut voor Sterrenkunde [Leuven], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Division technique INSU/SDU (DTI), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Hippolyte Fizeau (FIZEAU), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Royal Observatory of Belgium [Brussels] (ROB), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto de Astronomia, Geofisica e Ciencias Atmosfericas (IAGCAUSP), Universidade de São Paulo = University of São Paulo (USP), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Institute for Astronomy [Vienna], University of Vienna [Vienna], Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Departamento de Astrofisica [Madrid], Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Spanish Virtual Observatory - Observatorio Virtual Español (SVO), and Spanish Virtual Observatory - Observatorio Virtual Español
- Subjects
[INFO]Computer Science [cs] ,Stars: variable ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] - Abstract
International audience; Light curve parameters and classification results are presented for all the objects measured in the first four CoRoT observing runs: IRa01, SRc01, LRc01, and LRa01. The information presented here should allow scientists to make candidate lists of their objects of study and to obtain some basic light curve information. We recall that we did not perform detailed light curve modelling, only a basic one, sufficient for producing variability class memberships for each target. We refer to the paper for a detailed description of the light curve parameters, and the classification results. It is strongly advised to read the paper prior to using the results presented here. (4 data files).
- Published
- 2009
41. Automated supervised classification of variable stars in the CoRoT programme. Method and application to the first four exoplanet fields
- Author
-
Debosscher, J., Sarro, L. M., Lxf3pez, M., Deleuil, M., Aerts, C., Auvergne, M., Baglin, A., Baudin, F., Chadid, M., Charpinet, S., Cuypers, J., De Ridder, J., Garrido, R., Hubert, A. M., Janot-Pacheco, E., Jorda, L., Kaiser, A., Kallinger, T., Kollath, Z., Maceroni, C., Mathias, P., Michel, E., Moutou, C., Neiner, C., Ollivier, M., Samadi, R., Solano, E., Surace, C., Vandenbussche, B., Weiss, W. W., Debosscher, Sarro, L. M., Lxf3pez, Deleuil, Aerts, Auvergne, Baglin, Baudin, Chadid, Charpinet, Cuypers, De Ridder, Garrido, Hubert, A. M., Janot-Pacheco, Jorda, Kaiser, Kallinger, Kollath, Maceroni, Mathias, Michel, Moutou, Neiner, Ollivier, Samadi, Solano, Surace, Vandenbussche, Weiss, and W. W.
- Published
- 2009
42. Instability domains of \u03b4 Scuti and Slowly Pulsating B stars : How will the CoRoT satellite help to determine the limits ?
- Author
-
Lefxe8vre, L., Michel, E., Aerts, C., Kaiser, A., Neiner, C., Poretti, E., Garrido, R., Baglin, A., Auvergne, M., Catala, C., Weiss, W., Balaguer-Nxfaxf1ez, L., Maceroni, C., Ribas, I., Lefxe8vre, Michel, Aerts, Kaiser, Neiner, Poretti, Garrido, Baglin, Auvergne, Catala, Weiss, Balaguer-Nxfaxf1ez, Maceroni, and Ribas
- Published
- 2009
43. Space observations of B stars with CoRoT
- Author
-
Degroote, P., Miglio, A., Debosscher, J., Montalbxe1n, J., Cuypers, J., Briquet, M., De Cat, P., Thoul, A., Morel, T., Niemczura, E., Balaguer-Nxfaxf1ez, L., Maceroni, C., Ribas, I., Noels, A., Aerts, C., Auvergne, M., Baglin, A., Catala, C., Deleuil, M., Michel, E., Ollivier, M., Jorda, L., Samadi, R., Degroote, Miglio, Debosscher, Montalbxe1n, Cuypers, Briquet, De Cat, Thoul, Morel, Niemczura, Balaguer-Nxfaxf1ez, Maceroni, Ribas, Noels, Aerts, Auvergne, Baglin, Catala, Deleuil, Michel, Ollivier, Jorda, and Samadi
- Published
- 2009
44. Blue edge of the delta Scuti stars versus red edge of the SPB stars. How will CoRoT data help ?
- Author
-
Laure Lefevre, Eric Michel, Conny Aerts, Alexander Kaiser, Coralie Neiner, Ennio Poretti, Rafael Garrido, Annie Baglin, Michel Auvergne, Claude Catala, Werner Weiss, Lola Balaguer-Nunez, Maceroni, C., and Ignasi Ribas
- Subjects
Astronomy - Abstract
Contains fulltext : 71957.pdf (Publisher’s version ) (Closed access) Journées de la SF2A 2008, 30 Juin - 4 Juillet, Paris, 30 juni 2008
- Published
- 2008
45. Additional science potential for COROT
- Author
-
Weiss, WW, Aerts, C, Aigrain, S, Alecian, G, Antonello, E, Baglin, A, Bazot, M, Collier-Cameron, A, Charpinet, S, Gamarova, A, Handler, G, Hatzes, A, Hubert, AM, Lammer, H, Lebzelter, T, Maceroni, C, Marconi, M, de Martino, D, Janot-Pacheco, E, Pagano, I, Paunzen, E, Pinheiro, FJG, Poretti, E, Ribas, I, Ripepi, V, Roques, F, Silvotti, R, Surdej, J, Vauclair, G, Vauclair, S, Zwintz, K, and COROT, APWG
- Abstract
Space experiments which are aiming towards astero-seismology and the detection of exoplanets, like COROT or MOST, Eddington and Kepler, are designed to deliver high precision photometric data. Obviously, the they can be used also for other purposes than the primary science goals and in addition many other targets can or will be automatically observed simultaneously with the primary targets. As a consequence, fascinating possibilities for additional (parallel, secondary) science projects emerge. For COROT a dedicated working group was thus established with the goal to contribute any useful information which may optimize the scientific output of the mission.
- Published
- 2004
46. 'ENEAS': the European Network of Excellence in AsteroSeismology
- Author
-
Aerts, C., Baglin, A., Christensen-Dalsgaard, J., Goupil, M., Houdek, G., Kjeldsen, Hans, Kollath, Z., Kurtz, D., Lebreton, Y., Maceroni, C., Noels, A., Schwarzenberg-Czerny, A., Skoda, P., Solano, E., and Thompson, M.J.
- Published
- 2004
47. Eclipsing binary stars in the Large Magellanic Cloud: results from the EROS-2, OGLE and VMC surveys★
- Author
-
Muraveva, T., primary, Clementini, G., additional, Maceroni, C., additional, Evans, C. J., additional, Moretti, M. I., additional, Cioni, M.-R. L., additional, Marquette, J. B., additional, Ripepi, V., additional, de Grijs, R., additional, Groenewegen, M. A. T., additional, Piatti, A. E., additional, and van Loon, J. Th., additional
- Published
- 2014
- Full Text
- View/download PDF
48. CoRoT 105906206: a short-period and totally eclipsing binary with aδScuti type pulsator
- Author
-
da Silva, R., primary, Maceroni, C., additional, Gandolfi, D., additional, Lehmann, H., additional, and Hatzes, A. P., additional
- Published
- 2014
- Full Text
- View/download PDF
49. KIC 3858884: a hybridδScuti pulsator in a highly eccentric eclipsing binary
- Author
-
Maceroni, C., primary, Lehmann, H., additional, da Silva, R., additional, Montalbán, J., additional, Lee, C.-U., additional, Ak, H., additional, Deshpande, R., additional, Yakut, K., additional, Debosscher, J., additional, Guo, Z., additional, Kim, S.-L., additional, Lee, J. W., additional, and Southworth, J., additional
- Published
- 2014
- Full Text
- View/download PDF
50. KIC 11285625: A double-lined spectroscopic binary with aγDoradus pulsator discovered from Keplerspace photometry
- Author
-
Debosscher, J., Aerts, C., Tkachenko, A., Pavlovski, K., Maceroni, C., Kurtz, Donald Wayne, Beck, P. G., Bloemen, S., Degroote, P., Lombaert, R., Southworth, J., Debosscher, J., Aerts, C., Tkachenko, A., Pavlovski, K., Maceroni, C., Kurtz, Donald Wayne, Beck, P. G., Bloemen, S., Degroote, P., Lombaert, R., and Southworth, J.
- Abstract
Aims. We present the first binary modelling results for the pulsating, eclipsing binary KIC 11285625 that was discovered by the Kepler mission. An automated method to disentangle the pulsation spectrum and the orbital variability in high quality light curves was developed and applied. The goal was to obtain accurate orbital and component properties in combination with essential information derived from spectroscopy. Methods. A binary model for KIC 11285625 was obtained, using a combined analysis of high-quality space-based Kepler light curves and ground-based high-resolution HERMES echelle spectra. The binary model was used to separate the pulsation characteristics from the orbital variability in the Kepler light curve in an iterative way. We used an automated procedure based on the JKTEBOP binary modelling code to perform this task, and adapted codes for frequency analysis and prewhitening of periodic signals. Using a disentangling technique applied to the composite HERMES spectra, we obtained a higher signal-to-noise mean spectrum for both the primary and the secondary components. A model grid search method for fitting synthetic spectra was used for fundamental parameter determination for both components. Results. Accurate orbital and component properties of KIC 11285625 were derived, and we have obtained the pulsation spectrum of the γ Dor pulsator in the system. Detailed analysis of the pulsation spectrum revealed amplitude modulation on a timescale of a hundred days, and strong indications of frequency splittings at both the orbital frequency and the rotational frequency derived from spectroscopy. © ESO, 2013.
- Published
- 2013
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