Zobrazeno 1 - 10
of 1 790
pro vyhledávání: '"Gratton, R."'
Autor:
Delorme, P., Chomez, A., Squicciarini, V., Janson, M., Flasseur, O., Schib, O., Gratton, R., Lagrange, A-M., Langlois, M., Mayer, L., Helled, R., Reïffert, S, Kiefer, F., Biller, B., Chauvin, G., Fontanive, C., Henning, Th., Kenworthy, M., Marleau, G-D., Mesa, D., Meyer, M. R., Mordasini, C., Ringqvist, S. C., Samland, M., Vigan, A., Viswanath, G.
Exoplanets form from circumstellar protoplanetary discs whose fundamental properties (notably their extent, composition, mass, temperature and lifetime) depend on the host star properties, such as their mass and luminosity. B-stars are among the most
Externí odkaz:
http://arxiv.org/abs/2409.18793
Publikováno v:
A&A 690, A208 (2024)
The analysis of several spectroscopic surveys indicates the presence of a bimodality between the disc stars in the abundance ratio space of [${\alpha}$/Fe] versus [Fe/H]. The two stellar groups are commonly referred to as the high-${\alpha}$ and low-
Externí odkaz:
http://arxiv.org/abs/2405.11025
Autor:
Tschudi, C., Schmid, H. M., Nowak, M., Coroller, H. Le, Hunziker, S., van Holstein, R. G., Perrot, C., Mouillet, D., Augereau, J. -C., Bazzon, A., Beuzit, J. L., Boccaletti, A., Bonse, M. J., Chauvin, G., Desidera, S., Dohlen, K., Dominik, C., Engler, N., Feldt, M., Girard, J. H., Gratton, R., Henning, Th., Kasper, M., Kervella, P., Lagrange, A. -M., Langlois, M., Martinez, P., Ménard, F., Meyer, M. R., Milli, J., Pragt, J., Puget, P., Quanz, S. P., Roelfsema, R., Sauvage, J. -F., Szulagyi, J., Thalmann, Ch., Zurlo, A.
We carried out very deep VLT/SPHERE imaging polarimetry of the nearby system Eps Eri based on 38.5 hours of integration time with a 600 - 900 nm broadband filter to search for polarized scattered light from a planet or from circumstellar dust using A
Externí odkaz:
http://arxiv.org/abs/2404.19504
Autor:
Gratton, R., Bonavita, M., Mesa, D., Zurlo, A., Marino, S., Desidera, S., D'Orazi, V., Rigliaco, E., Squicciarini, V., Nogueira, P. H.
Dynamical masses of young planets aged between 10 and 200 Myr detected in imaging play a crucial role in shaping models of giant planet formation. Regrettably, only a few such objects possess these characteristics. Furthermore, the evolutionary patte
Externí odkaz:
http://arxiv.org/abs/2402.09067
Autor:
Gratton, R., Bonavita, M., Mesa, D., Desidera, S., Zurlo, A., Marino, S., D'Orazi, V., Rigliaco, E., Nascimbeni, V., Barbato, D., Columba, G., Squicciarini, V.
Recently, combining high-contrast imaging and space astrometry we found that Jupiter-like (JL) planets are frequent in the beta Pic moving group (BPMG) around those stars where their orbit can be stable, prompting further analysis and discussion. We
Externí odkaz:
http://arxiv.org/abs/2402.02148
Autor:
Ruggieri, A., Desidera, S., Biazzo, K., Pinamonti, M., Marzari, F., Mantovan, G., Sozzetti, A., Bonomo, A. S., Lanza, A. F., Malavolta, L., Claudi, R., Damasso, M., Gratton, R., Nardiello, D., Benatti, S., Bignamini, A., Andreuzzi, G., Borsa, F., Cabona, L., Knapic, C., Molinari, E., Pino, L., Zingales, T.
Planets in binary systems are a fascinating and yet poorly understood phenomenon. Since there are only a few known large-separation systems in which both components host planets, characterizing them is a key target for planetary science. In this pape
Externí odkaz:
http://arxiv.org/abs/2401.17876
Autor:
Palma-Bifani, P., Chauvin, G., Borja, D., Bonnefoy, M., Petrus, S., Mesa, D., De Rosa, R. J., Gratton, R., Baudoz, P., Boccaletti, A., Charnay, B., Desgrange, C., Tremblin, P., Vigan, A.
Aims. We aim to expand the atmospheric exploration of AF Lep b by modeling all available observations obtained with SPHERE at VLT (between 0.95-1.65, at 2.105, and 2.253 $\mu$m, and NIRC2 at Keck (at 3.8 $\mu$m) with self-consistent atmospheric model
Externí odkaz:
http://arxiv.org/abs/2401.05491
Autor:
Di Maio, C., Petralia, A., Micela, G., Lanza, A. F., Rainer, M., Malavolta, L., Benatti, S., Affer, L., Maldonado, J., Colombo, S., Damasso, M., Maggio, A., Biazzo, K., Bignamini, A., Borsa, F., Boschin, W., Cabona, L., Cecconi, M., Claudi, R., Covino, E., Di Fabrizio, L., Gratton, R., Lorenzi, V., Mancini, L., Messina, S., Molinari, E., Molinaro, M., Nardiello, D., Poretti, E., Sozzetti, A.
The intrinsic variability due to the magnetic activity of young active stars is one of the main challenges in detecting and characterising exoplanets. We present a method able to model the stellar photosphere and its surface inhomogeneities (starspot
Externí odkaz:
http://arxiv.org/abs/2312.14269
Autor:
Carleo, I., Malavolta, L., Desidera, S., Nardiello, D., Wang, S., Turrini, D., Lanza, A. F., Baratella, M., Marzari, F., Benatti, S., Biazzo, K., Bieryla, A., Brahm, R., Bonavita, M., Collins, K. A., Hellier, C., Locci, D., Hobson, M. J., Maggio, A., Mantovan, G., Pinamonti, S. Messina M., Rodriguez, J. E., Sozzetti, A., Stassun, K., Wang, X. Y., Ziegler, C., Damasso, M., Giacobbe, P., Murgas, F., Parviainen, H., Andreuzzi, G., Barkaoui, K., Berlind, P., Bignamini, A., Borsa, F., Briceño, C., Brogi, M., Cabona, L., Calkins, M. L., Capuzzo-Dolcetta, R., Cecconi, M., Colon, K. D., Cosentino, R., Dragomir, D., Esquerdo, G. A., Henning, T., Ghedina, A., Goeke, R. F., Gratton, R., Horta, F. Grau, Gupta, A. F., Jenkins, J. M., Jordán, A., Knapic, C., Latham, D. W., Mireles, I., Law, N., Lorenzi, V., Lund, M. B., Maldonado, J., Mann, A. W., Molinari, E., Pallé, E., Paegert, M., Pedani, M., Quinn, S. N., Scandariato, G., Seager, S., Winn, J. N., Wohler, B., Zingales, T.
Context. Different theories have been developed to explain the origins and properties of close-in giant planets, but none of them alone can explain all of the properties of the warm Jupiters (WJs, Porb = 10 - 200 days). One of the most intriguing cha
Externí odkaz:
http://arxiv.org/abs/2311.11903
Autor:
Columba, G., Rigliaco, E., Gratton, R., Mesa, D., D'Orazi, V., Ginski, C., Engler, N., Williams, J. P., Bae, J., Benisty, M., Birnstiel, T., Delorme, P., Dominik, C., Facchini, S., Menard, F., Pinilla, P., Rab, C., Ribas, Á., Squicciarini, V., van Holstein, R. G., Zurlo, A.
Publikováno v:
A&A 681, A19 (2024)
Context. The study of protoplanetary disks is fundamental to understand their evolution and interaction with the surrounding environment, and to constrain planet formation mechanisms. Aims. We aim at characterising the young binary system HD 34700 A,
Externí odkaz:
http://arxiv.org/abs/2310.16873