Zobrazeno 1 - 10
of 621
pro vyhledávání: '"Wittkowski, M"'
Autor:
Rosales-Guzmán, A., Sanchez-Bermudez, J., Paladini, C., Freytag, B., Wittkowski, M., Alberdi, A., Baron, F., Berger, J. -P., Chiavassa, A., Höfner, S., Jorissen, A., Kervella, P., Bouquin, J. -B. Le, Marigo, P., Montargès, M., Trabucchi, M., Tsvetkova, S., Schödel, R., Van Eck, S.
Publikováno v:
A&A 688, A124 (2024)
Stellar convection plays an important role in atmospheric dynamics, wind formation and the mass-loss processes in Asymptotic Giant Branch (AGB) stars. However, a direct characterization of convective surface structures in terms of size, contrast, and
Externí odkaz:
http://arxiv.org/abs/2405.10164
Autor:
Planquart, L., Paladini, C., Jorissen, A., Escorza, A., Pantin, E., Drevon, J., Aringer, B., Baron, F., Chiavassa, A., Cruzalèbes, P., Danchi, W., De Beck, E., Groenewegen, M. A. T., Höfner, S., Hron, J., Khouri, T., Lopez, B., Lykou, F., Montarges, M., Nardetto, N., Ohnaka, K., Olofsson, H., Rau, G., Rosales-Guzmán, A., Sanchez-Bermudez, J., Scicluna, P., Siess, L., Thévenin, F., Van Eck, S., Vlemmings, W. H. T., Weigelt, G., Wittkowski, M.
Publikováno v:
A&A 687, A306 (2024)
Our purpose is to study the effect of binary companions located within the first 10 stellar radii from the primary AGB star. In this work, we target the mass-losing carbon star V Hydrae (V Hya), looking for signatures of its companion in the dust for
Externí odkaz:
http://arxiv.org/abs/2405.07821
Publikováno v:
2024A&A...683A..19G
Mass loss plays a crucial role in the lives of massive stars, especially as the star leaves the main sequence and evolves to the red supergiant (RSG) phase. However, the physical processes that trigger mass-loss events in RSGs are not well understood
Externí odkaz:
http://arxiv.org/abs/2312.12521
Autor:
Rosales-Guzman, A., Sanchez-Bermudez, J., Paladini, C., Alberdi, A., Brandner, W., Cannon, E., González-Torà, G., Haubois, X., Henning, Th., Kervella, P., Montarges, M., Perrin, G., Schödel, R., Wittkowski, M.
Publikováno v:
A&A 674, A62 (2023)
The mass-loss mechanisms in M-type AGB stars are not well understood, in particular, the formation of dust-driven winds from the innermost gaseous layers around these stars. One way to understand the gas-dust interaction in these regions and its impa
Externí odkaz:
http://arxiv.org/abs/2303.00056
Publikováno v:
A&A 669, A76 (2023)
Red supergiants (RSGs) are evolved massive stars in a stage preceding core-collapse supernova. The physical processes that trigger mass loss in their atmospheres are still not fully understood. Based on observations of $\alpha$ Ori, a new semi-empiri
Externí odkaz:
http://arxiv.org/abs/2210.14940
Autor:
Drevon, Julien, Millour, Florentin, Cruzalèbes, Pierre, Paladini, Claudia, Hron, Josef, Meilland, A., Allouche, F., Hofmann, K. -H., Lagarde, S., Lopez, B., Matter, A., Petrov, R., Robbe-Dubois, S., Schertl, D., Wittkowski, M., Zins, G., Ábrahám, P., Antonelli, P., Beckmann, U., Berio, P., Bettonvil, F., Glindemann, A., Graser, U., Heininger, M., Henning, Thomas, Isbell, Jacob W., Jaffe, Walter, Labadie, Lucas, Leinert, Christoph, Lehmitz, Michael, Morel, Sébastien, Meisenheimer, Klaus, Soulain, Anthony, Varga, Josef, Weigelt, Gerd, Woillez, Julien, Augereau, Jean-Charles, van Boekel, Roy, Burtscher, Leonard, Danchi, William, Dominik, Carsten, Gamez-Rosas, Violetta, Hocdé, Vincent, Hogerheijde, M., Klarmann, Lucia, Kokoulina, Elena, Leftley, James, Stee, Ph., Vakili, Farrokh, Waters, Rens, Wolf, Sebastian, Yoffe, Gideon
AGB stars are one of the main sources of dust production in the Galaxy. However, it is not clear what this process looks like and where the dust is condensing in the circumstellar environment. By characterizing the location of the dust and the molecu
Externí odkaz:
http://arxiv.org/abs/2208.10845
Autor:
Montargès, M., Cannon, E., Lagadec, E., de Koter, A., Kervella, P., Sanchez-Bermudez, J., Paladini, C., Cantalloube, F., Decin, L., Scicluna, P., Kravchenko, K., Dupree, A. K., Ridgway, S., Wittkowski, M., Anugu, N., Norris, R., Rau, G., Perrin, G., Chiavassa, A., Kraus, S., Monnier, J. D., Millour, F., Bouquin, J. -B. Le, Haubois, X., Lopez, B., Stee, P., Danchi, W.
Publikováno v:
Nature, 2021, Volume 594, Issue 7863, p.365-368
Red supergiants are the most common final evolutionary stage of stars that have initial masses between 8 and 35 times that of the Sun. During this stage, which lasts roughly 100,000 years1, red supergiants experience substantial mass loss. However, t
Externí odkaz:
http://arxiv.org/abs/2201.10551
Autor:
Chiavassa, A., Kravchenko, K., Montargès, M., Millour, F., Matter, A., Freytag, B., Wittkowski, M., Hocdé, V., Cruzalèbes, P., Allouche, F., Lopez, B., Lagarde, S., Petrov, R. G., Meilland, A., Robbe-Dubois, S., Hofmann, K. -H., Weigelt, G., Berio, P., Bendjoya, P., Bettonvil, F., de Souza, A. Domiciano, Heininger, M., Henning, Th., Isbell, J. W., Jaffe, W., Labadie, L., Lehmitz, M., Meisenheimer, K., Soulain, A., Varga, J., Augereau, J. -C., van Boekel, R., Burtscher, L., Danchi, W. C., Dominik, C., Drevon, J., Rosas, V. Gámez, Hogerheijde, M. R., Hron, J., Klarmann, L., Kokoulina, E., Lagadec, E., Leftley, J., Mosoni, L., Nardetto1, N., Paladini, C., Pantin, E., Schertl, D., Stee, P., Szabados, L., Waters, R., Wolf, S., Yoffe, G.
Publikováno v:
A&A 658, A185 (2022)
Context. VX Sgr is a cool, evolved, and luminous red star whose stellar parameters are difficult to determine, which affects its classification. Aims. We aim to spatially resolve the photospheric extent as well as the circumstellar environment. Metho
Externí odkaz:
http://arxiv.org/abs/2112.10695
Autor:
Lopez, B., Lagarde, S., Petrov, R. G., Jaffe, W., Antonelli, P., Allouche, F., Berio, P., Matter, A., Meilland, A., Millour, F., Robbe-Dubois, S., Henning, Th., Weigelt, G., Glindemann, A., Agocs, T., Bailet, Ch., Beckmann, U., Bettonvil, F., van Boekel, R., Bourget, P., Bresson, Y., Bristow, P., Cruzalèbes, P., Eldswijk, E., Caujolle, Y. Fanteï, Herrera, J. C. González, Graser, U., Guajardo, P., Heininger, M., Hofmann, K. -H., Kroes, G., Laun, W., Lehmitz, M., Leinert, C., Meisenheimer, K., Morel, S., Neumann, U., Paladini, C., Percheron, I., Riquelme, M., Schoeller, M., Stee, Ph., Venema, L., Woillez, J., Zins, G., Ábrahám, P., Abadie, S., Abuter, R., Accardo, M., Adler, T., Alonso, J., Augereau, J. -C., Böhm, A., Bazin, G., Beltran, J., Bensberg, A., Boland, W., Brast, R., Burtscher, L., Castillo, R., Chelli, A., Cid, C., Clausse, J. -M., Connot, C., Conzelmann, R. D., Danchi, W. -C., Delbo, M., Drevon, J., Dominik, C., van Duin, A., Ebert, M., Eisenhauer, F., Flament, S., Frahm, R., Rosas, V. Gámez, Gabasch, A., Gallenne, A., Garces, E., Girard, P., Glazenborg, A., Gonté, F. Y. J., Guitton, F., de Haan, M., Hanenburg, H., Haubois, X., Hocdé, V., Hogerheijde, M., ter Horst, R., Hron, J., Hummel, C. A., Hubin, N., Huerta, R., Idserda, J., Isbell, J. W., Ives, D., Jakob, G., Jaskó, A., Jochum, L., Klarmann, L., Klein, R., Kragt, J., Kuindersma, S., Kokoulina, E., Labadie, L., Lacour, S., Leftley, J., Poole, R. Le, Lizon, J. -L., Lopez, M., Mérand, A., Marcotto, A., Mauclert, N., Maurer, T., Mehrgan, L. H., Meisner, J., Meixner, K., Mellein, M., Menut, J. L., Mohr, L., Mosoni, L., Navarro, R., Nussbaum, E., Pallanca, L., Pantin, E., Pasquini, L., Duc, T. Phan, Pott, J. -U., Pozna, E., Richichi, A., Ridinger, A., Rigal, F., Rivinius, Th., Roelfsema, R., Rohloff, R. -R., Rousseau, S., Salabert, D., Schertl, D., Schuhler, N., Schuil, M., Shabun, K., Soulain, A., Stephan, C., Toledo, P., Tristram, K., Tromp, N., Vakili, F., Varga, J., Vinther, J., Waters, L. B. F. M., Wittkowski, M., Wolf, S., Wrhel, F., Yoffe, G.
Publikováno v:
A&A 659, A192 (2022)
Context:Optical interferometry is at a key development stage. ESO's VLTI has established a stable, robust infrastructure for long-baseline interferometry for general astronomical observers. The present second-generation instruments offer a wide wavel
Externí odkaz:
http://arxiv.org/abs/2110.15556
Autor:
Cotton, W. D., Humphreys, E., Wittkowski, M., Baudry, A., Richards, A. M. S., Vlemmings, W., Khouri, T., Etoka, S.
Interactions between AGB stars and a secondary in a close orbit are one possible explanation of why some AGB stars develop into aspherical planetary nebulae. This study uses millimeter observations of the continuum and SiO maser emission in several s
Externí odkaz:
http://arxiv.org/abs/2107.09567