Zobrazeno 1 - 10
of 436
pro vyhledávání: '"Meeus, G."'
Autor:
Eiroa, C., Rebollido, I., Montesinos, B., Villaver, E., Absil, O., Henning, Th., Bayo, A., Canovas, H., Carmona, A., Chen, Ch., Ertel, S., Iglesias, D. P., Launhardt, R., Maldonado, J., Meeus, G., Moór, A., Mora, A., Mustill, A. J., Olofsson, J., Riviere-Marichalar, P., Roberge, A.
We present an intensive monitoring of high-resolution spectra of the Ca II K line in the A7IV shell star phi Leo at very short (minutes, hours), short (night to night), and medium (weeks, months) timescales. The spectra show remarkable variable absor
Externí odkaz:
http://hdl.handle.net/10150/622798
http://arizona.openrepository.com/arizona/handle/10150/622798
http://arizona.openrepository.com/arizona/handle/10150/622798
Autor:
Guzman-Diaz, J., Montesinos, B., Mendigutia, I., Kama, M., Meeus, G., Vioque, M., Oudmaijer, R. D., Villaver, E.
Publikováno v:
A&A 671, A140 (2023)
(Abridged) The stellar metallicity, [M/H], may have important implications for planet formation. In particular, Kama et al. proposed that the deficit of refractory elements in the surfaces of some Herbig Ae/Be stars (HAeBes) may be linked to the pres
Externí odkaz:
http://arxiv.org/abs/2212.14022
Autor:
Squicciarini, V., Gratton, R., Janson, M., Mamajek, E. E., Chauvin, G., Delorme, P., Langlois, M., Vigan, A., Ringqvist, S. C., Meeus, G., Reffert, S., Kenworthy, M., Meyer, M. R., Bonnefoy, M., Bonavita, M., Mesa, D., Samland, M., Desidera, S., D'Orazi, V., Engler, N., Alecian, E., Miglio, A., Henning, T., Quanz, S. P., Mayer, L., Flasseur, O., Marleau, G. D.
Publikováno v:
A&A 664, A9 (2022)
Virtually all known exoplanets reside around stars with $M<2.3~M_\odot$; to clarify if the dearth of planets around more massive stars is real, we launched the direct-imaging B-star Exoplanet Abundance STudy (BEAST) survey targeting B stars ($M>2.4~M
Externí odkaz:
http://arxiv.org/abs/2205.02279
Autor:
Eiroa, C., Montesinos, B., Rebollido, I., Henning, Th., Launhardt, R., Maldonado, J., Meeus, G., Mora, A., Rivière-Marichalar, P., Villaver, E.
Publikováno v:
A&A 653, A115 (2021)
Variable red- and blue-shifted absorption features observed in the Ca ii K line towards the A-type shell star $\phi$ Leo have been suggested by us in a previous work to be likely due to solid, comet-like bodies in the circumstellar (CS) environment.
Externí odkaz:
http://arxiv.org/abs/2106.16229
Autor:
Guzman-Diaz, J., Mendigutia, I., Montesinos, B., Oudmaijer, R. D., Vioque, M., Rodrigo, C., Solano, E., Meeus, G., Marcos-Arenal, P.
(Abridged) Herbig Ae/Be stars (HAeBes) have so far been studied based on relatively small samples that are scattered throughout the sky. Their fundamental stellar and circumstellar parameters and statistical properties were derived with heterogeneous
Externí odkaz:
http://arxiv.org/abs/2104.11759
Autor:
Pascucci, I., Banzatti, A., Gorti, U., Fang, M., Pontoppidan, K., Alexander, R., Ballabio, G., Edwards, S., Salyk, C., Sacco, G., Flaccomio, E., Blake, G. A., Carmona, A., Hall, C., Kamp, I., Kaufl, H. U., Meeus, G., Meyer, M., Pauly, T., Steendam, S., Sterzik, M.
We analyze high-resolution (dv=<10km/s) optical and infrared spectra covering the [OI] 6300 angstrom and [NeII] 12.81 micron lines from a sample of 31 disks in different evolutionary stages. Following work at optical wavelengths, we use Gaussian prof
Externí odkaz:
http://arxiv.org/abs/2009.09114
Autor:
Rebollido, I., Eiroa, C., Montesinos, B., Maldonado, J., Villaver, E., Absil, O., Bayo, A., Canovas, H., Carmona, A., Chen, Ch., Ertel, S., Henning, Th., Iglesias, D. P., Launhardt, R., Liseau, R., Meeus, G., Moór, A., Mora, A., Olofsson, J., Rauw, G., Riviere-Marichalar, P.
Publikováno v:
A&A 639, A11 (2020)
While exoplanets are now routinely detected, the detection of small bodies in extrasolar systems remains challenging. Since the discovery of sporadic events interpreted as exocomets (Falling Evaporating Bodies) around $\beta$ Pic in the early 80s, on
Externí odkaz:
http://arxiv.org/abs/2003.11084
Autor:
Montesinos, B., Eiroa, C., Lillo-Box, J., Rebollido, I., Djupvik, A. A., Absil, O., Ertel, S., Marion, L., Kajava, J. J. E., Redfield, S., Isaacson, H., Cánovas, H., Meeus, G., Mendigutía, I., Mora, A., Rivière-Marichalar, P., Villaver, E., Maldonado, J., Henning, T.
Publikováno v:
A&A 629, A19 (2019)
This paper is framed within a large project devoted to studying the presence of circumstellar material around main sequence stars, and looking for exocometary events. The work concentrates on HR 10 (A2 IV/V), known for its conspicuous variability in
Externí odkaz:
http://arxiv.org/abs/1907.12441
Autor:
Rebollido, I., Eiroa, C., Montesinos, B., Maldonado, J., Villaver, E., Absil, O., Bayo, A., Canovas, H., Carmona, A., Chen, Ch., Ertel, S., Garufi, A., Henning, Th., Iglesias, D. P., Laundhart, R., Lisseau, R., Meeus, G., Móor, A., Mora, A., Olofsson, J., Rauw, G., Riviere-Marichalar, P.
Publikováno v:
A&A 614, A3 (2018)
Debris discs have often been described as gas-poor discs as the gas-to-dust ratio is expected to be considerably lower than in primordial,protoplanetary discs. However, recent observations have confirmed the presence of a non-negligible amount of col
Externí odkaz:
http://arxiv.org/abs/1801.07951
Autor:
Canovas, H., Montesinos, B., Schreiber, M. R., Cieza, L. A., Eiroa, C., Meeus, G., de Boer, J., Ménard, F., Wahhaj, Z., Riviere-Marichalar, P., Olofsson, J., Garufi, A., Rebollido, I., van Holstein, R. G., Caceres, C., Hardy, A., Villaver, E.
Publikováno v:
A&A 610, A13 (2018)
DZ Cha is a weak-lined T Tauri star (WTTS) surrounded by a bright protoplanetary disc with evidence of inner disc clearing. Its narrow $\Ha$ line and infrared spectral energy distribution suggest that DZ Cha may be a photoevaporating disc. We aim to
Externí odkaz:
http://arxiv.org/abs/1710.09393