Zobrazeno 1 - 10
of 4 410
pro vyhledávání: '"Hara, N."'
Autor:
Cortes-Zuleta, P., Boisse, I., Ould-Elhkim, M., Wilson, T. G., Larue, P., Carmona, A., Delfosse, X., Donati, J. -F., Forveille, T., Moutou, C., Cameron, A. Collier, Artigau, E., Acuña, L., Altinier, L., Astudillo-Defru, N., Baruteau, C., Bonfils, X., Cabrit, S., Cadieux, C., Cook, N. J., Decocq, E., Diaz, R. F., Fouque, P., da Silva, J. Gomes, Grankin, K., Grouffal, S., Hara, N., Hebrard, G., Heidari, N., Martins, J. H. C., Martioli, E., Maurice, M., Scigliuto, J., Bell, J. Serrano, Sulis, S., Petit, A. C., Vivien, H. G.
We report the discovery of a super-Earth candidate orbiting the nearby mid M dwarf Gl\,725A using the radial velocity (RV) method. The planetary signal has been independently identified using high-precision RVs from the SOPHIE and SPIRou spectrograph
Externí odkaz:
http://arxiv.org/abs/2411.09506
Autor:
Cretignier, M., Hara, N. C., Pietrow, A. G. M., Zhao, Y., Yu, H., Dumusque, X., Sozzetti, A., Lovis, C., Aigrain, S.
In our former paper I, we showed on the Sun that different active regions possess unique intensity profiles on the Ca II H & K lines. We now extend the analysis by showing how those properties can be used on real stellar observations, delivering more
Externí odkaz:
http://arxiv.org/abs/2411.00557
Autor:
Sulis, S., Crossfield, I. J. M., Santerne, A., Saillenfest, M., Sousa, S., Mary, D., Aguichine, A., Deleuil, M., Mena, E. Delgado, Mathur, S., Polanski, A., Adibekyan, V., Boisse, I., Costes, J. C., Cretignier, M., Heidari, N., Lebarbé, C., Forveille, T., Hara, N., Meunier, N., Santos, N., Balcarcel-Salazar, S., Cortés-Zuleta, P., Dalal, S., Gorjian, V., Halverson, S., Howard, A. W., Kosiarek, M. R., Lopez, T. A., Martin, D. V., Mousis, O., Rajkumar, B., Ström, P. A., Udry, S., Venot, O., Willett, E.
Context. Planets with radii of between 2-4 RE closely orbiting solar-type stars are of significant importance for studying the transition from rocky to giant planets. Aims. Our goal is to determine the mass of a transiting planet around the very brig
Externí odkaz:
http://arxiv.org/abs/2405.17155
Autor:
Leleu, A., Delisle, J. -B., Delrez, L., Bryant, E. M., Brandeker, A., Osborn, H. P., Hara, N., Wilson, T. G., Billot, N., Lendl, M., Ehrenreich, D., Chakraborty, H., Günther, M. N., Hooton, M. J., Alibert, Y., Alonso, R., Alves, D. R., Anderson, D. R., Apergis, I., Armstrong, D., Bárczy, T., Navascues, D. Barrado, Barros, S. C. C., Battley, M. P., Baumjohann, W., Bayliss, D., Beck, T., Benz, W., Borsato, L., Broeg, C., Burleigh, M. R., Casewell, S. L., Cameron, A. Collier, Correia, A. C. M., Csizmadia, Sz., Cubillos, P. E., Davies, M. B., Deleuil, M., Deline, A., Demangeon, O. D. S., Demory, B. -O., Derekas, A., Edwards, B., Erikson, A., Fortier, A., Fossati, L., Fridlund, M., Gandolfi, D., Gazeas, K., Gillen, E., Gillon, M., Goad, M. R., Güdel, M., Hawthorn, F., Heitzmann, A., Helling, Ch., Isaak, K. G., Jenkins, J. S., Jenkins, J. M., Kendall, A., Kiss, L. L., Korth, J., Lam, K. W. F., Laskar, J., Latham, D. W., Etangs, A. Lecavelier des, Magrin, D., Maxted, P. F. L., McCormac, J., Mordasini, C., Moyano, M., Nascimbeni, V., Olofsson, G., Osborn, A., Ottensamer, R., Pagano, I., Pallé, E., Peter, G., Piotto, G., Pollacco, D., Queloz, D., Ragazzoni, R., Rando, N., Rauer, H., Ribas, I., Ricker, G., Saha, S., Santos, N. C., Scandariato, G., Seager, S., Ségransan, D., Simon, A. E., Smith, A. M. S., Sousa, S. G., Stalport, M., Sulis, S., Szabó, Gy. M., Udry, S., Van Grootel, V., Vanderspek, R., Venturini, J., Villaver, E., Vinés, J. I., Walton, N. A., West, R. G., Winn, J., Zivave, T.
Publikováno v:
A&A 688, A211 (2024)
The TOI-178 system consists of a nearby late K-dwarf transited by six planets in the super-Earth to mini-Neptune regime, with radii ranging from 1.2 to 2.9 earth radius and orbital periods between 1.9 and 20.7 days. All planets but the innermost one
Externí odkaz:
http://arxiv.org/abs/2405.13732
Publikováno v:
A&A 687, A148 (2024)
High precision spectrographs might exhibit temporal variations of their reference velocity or nightly zero point (NZP). One way to monitor the NZP is to measure bright stars, which are assumed to have an intrinsic radial velocity variation much small
Externí odkaz:
http://arxiv.org/abs/2404.17282
Autor:
Mascareño, A. Suárez, Passegger, V. M., Hernández, J. I. González, Armstrong, D. J., Nielsen, L. D., Lovis, C., Lavie, B., Sousa, S. G., Silva, A. M., Allart, R., Rebolo, R., Pepe, F., Santos, N. C., Cristiani, S., Sozzetti, A., Osorio, M. R. Zapatero, Tabernero, H. M., Dumusque, X., Udry, S., Adibekyan, V., Prieto, C. Allende, Alibert, Y., Barros, S. C. C., Bouchy, F., Castro-González, A., Collins, K. A., Damasso, M., D'Odorico, V., Demangeon, O. D. S., Di Marcantonio, P., Ehrenreich, D., Hadjigeorghiou, A., Hara, N., Hawthorn, F., Jenkins, J. M., Lillo-Box, J., Curto, G. Lo, Martins, C. J. A. P., Mehner, A., Micela, G., Molaro, P., Nunes, N., Nari, N., Osborn, A., Pallé, E., Ricker, G. R., Rodrigues, J., Rowden, P., Seager, S., Stefanov, A. K., Strøm, P. A., Villaseñor, J. N. S., Watkins, C. N., Winn, J., Wohler, B., Zambelli, R.
The number of super-Earth and mini-Neptune planet discoveries has increased significantly in the last two decades thanks to transit and radial velocity surveys. When it is possible to apply both techniques, we can characterise the internal compositio
Externí odkaz:
http://arxiv.org/abs/2402.04113
Autor:
Swayne, M. I., Maxted, P. F. L., Triaud, A. H. M. J., Sousa, S. G., Deline, A., Ehrenreich, D., Hoyer, S., Olofsson, G., Boisse, I., Duck, A., Gill, S., Martin, D., McCormac, J., Persson, C. M., Santerne, A., Sebastian, D., Standing, M. R., Acuña, L., Alibert, Y., Alonso, R., Anglada, G., Bárczy, T., Navascues, D. Barrado, Barros, S. C. C., Baumjohann, W., Baycroft, T. A., Beck, M., Beck, T., Benz, W., Billot, N., Bonfils, X., Borsato, L., Bourrier, V., Brandeker, A., Broeg, C., Carmona, A., Charnoz, S., Cameron, A. Collier, Cortés-Zuleta, P., Csizmadia, Sz., Cubillos, P. E., Davies, M. B., Deleuil, M., Delfosse, X., Delrez, L., Demangeon, O. D. S., Demory, B. -O., Dransfield, G., Erikson, A., Fortier, A., Forveille, T., Fossati, L., Fridlund, M., Gandolfi, D., Gillon, M., Güdel, M., Günther, M. N., Hara, N., Hébrard, G., Heidari, N., Hellier, C., Helling, Ch., Isaak, K. G., Kerschbaum, F., Kiefer, F., Kiss, L. L., Kunovac, V., Lalitha, S., Lam, K. W. F., Laskar, J., Etangs, A. Lecavelier des, Lendl, M., Magrin, D., Marafatto, L., Martioli, E., Miller, N. J., Mordasini, C., Moutou, C., Nascimbeni, V., Ottensamer, R., Pagano, I., Pallé, E., Peter, G., Piazza, D., Piotto, G., Pollacco, D., Queloz, D., Ragazzoni, R., Rando, N., Rauer, H., Ribas, I., Santos, N. C., Scandariato, G., Ségransan, D., Simon, A. E., Smith, A. M. S., Southworth, R., Stalport, M., Szabó, Gy. M., Thomas, N., Udry, S., Ulmer, B., Van Grootel, V., Venturini, J., Walton, N. A., Willett, E., Wilson, T. G.
Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This ``radius inflation'' problem could have an impact on both stellar and exoplanetary sc
Externí odkaz:
http://arxiv.org/abs/2312.11339
Autor:
Heidari, N., Boisse, I., Hara, N. C., Wilson, T. G., Kiefer, F., Hébrard, G., Philipot, F., Hoyer, S., Stassun, K. G., Henry, G. W., Santos, N. C., Acuña, L., Almasian, D., Arnold, L., Astudillo-Defru, N., Attia, O., Bonfils, X., Bouchy, F., Bourrier, V., Collet, B., Cortés-Zuleta, P., Carmona, A., Delfosse, X., Dalal, S., Deleuil, M., Demangeon, O. D. S., Díaz, R. F., Dumusque, X., Ehrenreich, D., Forveille, T., Hobson, M. J., Jenkins, J. S., Jenkins, J. M., Lagrange, A. M., Latham, D. W., Larue, P., Liu, J., Moutou, C., Mignon, L., Osborn, H. P., Pepe, F., Rapetti, D., Rodrigues, J., Santerne, A., Segransan, D., Shporer, A., Sulis, S., Torres, G., Udry, S., Vakili, F., Vanderburg, A., Venot, O., Vivien, H. G., Vines, J. I.
Publikováno v:
A&A 681, A55 (2024)
Transiting planets with orbital periods longer than 40 d are extremely rare among the 5000+ planets discovered so far. The lack of discoveries of this population poses a challenge to research into planetary demographics, formation, and evolution. Her
Externí odkaz:
http://arxiv.org/abs/2311.13513
Autor:
Carmona, A., Delfosse, X., Bellotti, S., Cortés-Zuleta, P., Ould-Elhkim, M., Heidari, N., Mignon, L., Donati, J. F., Moutou, C., Cook, N., Artigau, E., Fouqué, P., Martioli, E., Cadieux, C., Morin, J., Forveille, T., Boisse, I., Hébrard, G., Díaz, R. F., Lafrenière, D., Kiefer, F., Petit, P., Doyon, R., Acuña, L., Arnold, L., Bonfils, X., Bouchy, F., Bourrier, V., Dalal, S., Deleuil, M., Demangeon, O., Dumusque, X., Hara, N., Hoyer, S., Mousis, O., Santerne, A., Ségrasan, D., Stalport, M., Udry, S.
Publikováno v:
A&A 674, A110 (2023)
Context: The search for extrasolar planets around the nearest M dwarfs is a crucial step towards identifying the nearest Earth-like planets. One of the main challenges in this search is that M dwarfs can be magnetically active and stellar activity ca
Externí odkaz:
http://arxiv.org/abs/2303.16712
Autor:
Cortes-Zuleta, P., Boisse, I., Klein, B., Martioli, E., Cristofari, P. I., Antoniadis-Karnavas, A., Donati, J-F., Delfosse, X., Cadieux, C., Heidari, N., Artigau, E., Bellotti, S., Bonfils, X., Carmona, A., Cook, N. J., Diaz, R. F., Doyon, R., Fouque, P., Moutou, C., Petit, P., Vandal, T., Acuña, L., Arnold, L., Astudillo-Defru, N., Bourrier, V., Bouchy, F., Cloutier, R., Dalal, S., Deleuil, M., Demangeon, O. D. S., Dumusque, X., Forveille, T., da Silva, J. Gomes, Hara, N., Hebrard, G., Hoyer, S., Hussain, G., Kiefer, F., Morin, J., Santerne, A., Santos, N. C., Segransan, D., Stalport, M., Udry, S.
Publikováno v:
A&A 673, A14 (2023)
The stellar activity of M dwarfs is the main limitation for discovering and characterizing exoplanets orbiting them since it induces quasi-periodic RV variations. We aim to characterize the magnetic field and stellar activity of the early, moderately
Externí odkaz:
http://arxiv.org/abs/2301.10614