Zobrazeno 1 - 10
of 2 087
pro vyhledávání: '"Wit, A. J."'
Autor:
Koumpia, E., Sun, D., Koutoulaki, M., Ilee, J. D., de Wit, W. -J., Oudmaijer, R. D., Frost, A. J.
Publikováno v:
A&A 690, A209 (2024)
The inner parts of the hot discs surrounding massive young stellar objects (MYSOs) are still barely explored due to observational limitations in terms of angular resolution, scarcity of diagnostic lines and the embedded and rare nature of these targe
Externí odkaz:
http://arxiv.org/abs/2408.15482
Publikováno v:
A&A 681, A85 (2024)
Given the high incidence of binaries among mature field massive stars, it is clear that multiplicity is an inevitable outcome of high-mass star formation. Understanding how massive multiples form requires the study of the birth environments of massiv
Externí odkaz:
http://arxiv.org/abs/2311.06131
Autor:
Koumpia, Evgenia, Koutoulaki, M., de Wit, W. -J., Oudmaijer, R. D., Frost, A. J., Lumsden, S. L., Pittard, J. M.
With steady observational advances, the formation of massive stars is being understood in more detail. Numerical models are converging on a scenario where accretion discs play a key role. Direct observational evidence of such discs at a few au scales
Externí odkaz:
http://arxiv.org/abs/2211.13085
The fate of a massive star during the latest stages of its evolution is highly dependent on its mass-loss history and geometry, with the yellow hypergiants being key objects to study those phases of evolution. We present near-IR interferometric obser
Externí odkaz:
http://arxiv.org/abs/2207.05812
Autor:
Bordier, E., Frost, A. J., Sana, H., Reggiani, M., Mérand, A., Rainot, A., Ramírez-Tannus, M. C., de Wit, W. J.
Publikováno v:
A&A 663, A26 (2022)
Spectroscopic multiplicity surveys of O stars in young clusters and OB associations have revealed that a large portion ($\sim$ 70%) of these massive stars (M$_{i}$ $\gt$ 15 $M_{\odot}$) belong to close and short-period binaries (physical separation d
Externí odkaz:
http://arxiv.org/abs/2203.05036
VLTI-MATISSE L- and N-band aperture-synthesis imaging of the unclassified B[e] star FS Canis Majoris
Autor:
Hofmann, K. -H., Bensberg, A., Schertl, D., Weigelt, G., Wolf, S., Meilland, A., Millour, F., Waters, L. B. F. M., Kraus, S., Ohnaka, K., Lopez, B., Petrov, R. G., Lagarde, S., Berio, Ph., Allouche, F., Robbe-Dubois, S., Jaffe, W., Henning, Th., Paladini, C., Schöller, M., Mérand, A., Glindemann, A., Beckmann, U., Heininger, M., Bettonvil, F., Zins, G., Woillez, J., Bristow, P., Stee, P., Vakili, F., van Boekel, R., Hogerheijde, M. R., Dominik, C., Augereau, J. -C., Matter, A., Hron, J., Pantin, E., Rivinius, Th., de Wit, W. -J., Varga, J., Klarmann, L., Meisenheimer, K., Rosas, V. Gámez, Burtscher, L., Leftley, J., Isbell, J. W., Yoffe, G., Kokoulina, E., Danchi, W. C., Cruzalèbes, P., de Souza, A. Domiciano, Drevon, J., Hocdé, V., Kreplin, A., Labadie, L., Connot, C., Nußbaum, E., Lehmitz, M., Antonelli, P., Graser, U., Leinert, C.
Context: FS Canis Majoris (FS CMa, HD 45677) is an unclassified B[e] star surrounded by an inclined dust disk. The evolutionary stage of FS CMa is still debated. Perpendicular to the circumstellar disk, a bipolar outflow was detected. Infrared apertu
Externí odkaz:
http://arxiv.org/abs/2111.12458
Autor:
Mehner, A., Janssens, S., Agliozzo, C., de Wit, W. -J., Boffin, H. M. J., Baade, D., Bodensteiner, J., Groh, J. H., Mahy, L., Vogt, F. P. A.
Luminous blue variable stars (LBVs) are of great interest in massive-star evolution as they experience very high mass-loss episodes within short periods of time. HR Car is a famous member of this class in the Galaxy. It has a large circumstellar nebu
Externí odkaz:
http://arxiv.org/abs/2109.13416
Autor:
Agliozzo, C., Phillips, N., Mehner, A., Baade, D., Scicluna, P., Kemper, F., Asmus, D., de Wit, W. -J., Pignata, G.
Publikováno v:
A&A 655, A98 (2021)
(Shortened) Luminous blue variable stars (LBVs) form dust as a result of episodic, violent mass loss. To investigate their contribution as dust producers in the Magellanic Clouds, we analyse 31 LBVs from a recent census. We built a maximally complete
Externí odkaz:
http://arxiv.org/abs/2109.04093
Young massive stars influence their surroundings from local to galactic scales, but the observational challenges associated with their distance and embedded nature has, until the recent decade, made high-resolution studies of these objects difficult.
Externí odkaz:
http://arxiv.org/abs/2108.05234
Autor:
Koumpia, E., de Wit, W. -J., Oudmaijer, R. D., Frost, A. J., Lumsden, S., Garatti, A. Caratti o, Goodwin, S. P., Stecklum, B., Mendigutıa, I., Ilee, J. D., Vioque, M.
Publikováno v:
A&A 654, A109 (2021)
Circumstellar discs are essential for high mass star formation, while multiplicity, in particular binarity, appears to be an inevitable outcome since the vast majority of massive stars (> 8 Msun) are found in binaries (up to 100%). We constrain the s
Externí odkaz:
http://arxiv.org/abs/2108.02868