Výsledky vyhledávání - "W.-J. de Wit"

First spatially resolved Na i and He i transitions towards a massive young stellar object. Finding new tracers for the gaseous star/disc interface

Autor: Evgenia Koumpia, M Koutoulaki, W-J de Wit, R D Oudmaijer, A J Frost, S L Lumsden, J M Pittard

Publikováno v: Monthly Notices of the Royal Astronomical Society: Letters. 519:L51-L56

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: https://explore.openaire.eu/search/publication?articleId=doi_________::26daedf7d095985e758ce3233a8a15b3
https://doi.org/10.1093/mnrasl/slac151

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Akademický článek

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The origin of close massive binaries in the M17 star-forming region

Autor: E. Bordier, A. J. Frost, H. Sana, M. Reggiani, A. Mérand, A. Rainot, M. C. Ramírez-Tannus, W. J. de Wit

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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39cc159790aaf74882d111d7417d767d
https://lirias.kuleuven.be/handle/20.500.12942/700304

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Optical and near-infrared observations of the Fried Egg Nebula; Multiple shell ejections on a 100 yr timescale from a massive yellow hypergiant

Autor: V. Graham, N. L. J. Cox, Eric Lagadec, C. Wichittanakom, R. D. Oudmaijer, F. Millour, G. Banyard, S. H. J. Wallstrom, John H. Black, Albert A. Zijlstra, E. Koumpia, Ryszard Szczerba, Sebastien Muller, K. M. Ababakr, H. Van Winckel, W. J. de Wit, Michel Hillen, Jacco Vink

Context. The fate of a massive star during the latest stages of its evolution is highly dependent on its mass-loss rate/geometry and therefore knowing the geometry of the circumstellar material close to the star and its surroundings is crucial. Aims.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf4534a3f31ec47164176c78ea74f4bf

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Using mid-IR instrumentation to investigate disc evolution in massive YSOs

Autor: Frost, A. J., R. D. Oudmaijer, W-J De Wit, S. L. Lumsden

Massive stars (M>8Mdot) hold huge influence in the cosmos, affecting scales from their own stellar environment and to whole galaxies. Despite their importance, the formation of massive stars is poorly understood as they are deeply embedded, distant a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c852eb1d4572db21a49a865737fb6ff

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The contribution by luminous blue variable stars to the dust content of the Magellanic Clouds

Autor: Giuliano Pignata, Peter Scicluna, Neil M. Phillips, Andrea Mehner, W. J. de Wit, Dietrich Baade, C. Agliozzo, Daniel Asmus, Francisca Kemper

(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: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94c754302a92e23d213e0bce929df8cf
https://eprints.soton.ac.uk/453215/

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K-band GRAVITY/VLTI interferometry of 'extreme' Herbig Be stars. The size–luminosity relation revisited

Autor: John D. Ilee, M. Vioque, W. J. de Wit, Rene D. Oudmaijer, I. Mendigutía, P. Marcos-Arenal, Benjamin Montesinos, J. Guzmán-Díaz, C. Wichittanakom, E. Koumpia

Publikováno v: DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
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(Abridged:) It has been hypothesized that the location of Herbig Ae/Be stars (HAeBes) within the empirical relation between the inner disk radius (r$_{in}$), inferred from K-band interferometry, and the stellar luminosity (L$_*$), is related to the p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::908fad95adfbf058024bc32d978e3943
https://www.aanda.org/articles/aa/full_html/2021/08/aa40724-21/aa40724-21.html

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VLTI-MATISSE chromatic aperture-synthesis imaging of η Carinae's stellar wind across the Brα line: Periastron passage observations in February 2020

Autor: Th. Rivinius, C. M. P. Russell, A. Domiciano de Souza, Uwe Beckmann, Lucas Labadie, F. Allouche, P. Cruzalèbes, Sylvie Robbe-Dubois, Antoine Mérand, William C. Danchi, A. F. J. Moffat, Kenji Hamaguchi, Michael F. Corcoran, József Varga, Alexis Matter, Thomas I. Madura, Stephane Lagarde, Sebastian Wolf, Anthony Meilland, Walter Jaffe, Paul Bristow, T. R. Gull, Felix Bettonvil, D. A. Espinoza-Galeas, Jose H. Groh, J. C. Augereau, Carsten Dominik, W. J. de Wit, Markus Schöller, J. Leftley, V. Hocdé, Uwe Graser, R. van Boekel, F. Navarete, L. Klarmann, K. Ohnaka, Leonard Burtscher, Th. Henning, Karl-Heinz Hofmann, Augusto Damineli, Ian R. Stevens, C. Connot, Klaus Meisenheimer, Stefan Kraus, Patrick W. Morris, G. Yoffe, Michiel R. Hogerheijde, Romain Petrov, Ph. Berio, M. Heininger, Henrik Hartman, J. W. Isbell, Markus Wittkowski, Eric Pantin, E. Kokoulina, J. Drevon, Julien Woillez, L. B. F. M. Waters, E. Nußbaum, Dieter Schertl, Bruno Lopez, Alexander Kreplin, Gerd Weigelt, Florentin Millour, D. J. Hillier, J. Hron, M. Lehmitz, V. Gámez Rosas, J. Sanchez-Bermudez, Noel D. Richardson, C. A. Hummel, Claudia Paladini, Andrea Mehner, Farrokh Vakili, Andreas Glindemann, P. Antonelli, C. Leinert, Gérard Zins, Philippe Stee

Publikováno v: Astronomy & Astrophysics, 652:A140. EDP Sciences
Astronomy & Astrophysics, 652
Astronomy & Astrophysics, 652, 1-22
Astronomy & Astrophysics, 652, pp. 1-22

Context. Eta Carinae is a highly eccentric, massive binary system (semimajor axis ~15.5 au) with powerful stellar winds and a phase-dependent wind-wind collision (WWC) zone. The primary star, η Car A, is a luminous blue variable (LBV); the secondary

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d06daaf6607db2ea8e3aee0292014bdb
https://dare.uva.nl/personal/pure/en/publications/vltimatisse-chromatic-aperturesynthesis-imaging-of--carinaes-stellar-wind-across-the-br-line(1b2ef33d-ecf6-411a-8241-108b7aa6f984).html

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Akademický článek

Dusty Blue Supergiants: News from High-Angular Resolution Observations

Autor: W. J. de Wit, R. D. Oudmaijer, J. S. Vink

Publikováno v: Advances in Astronomy, Vol 2014 (2014)

An overview is presented of the recent advances in understanding the B[e] phenomenon among blue supergiant stars in light of high-angular resolution observations and with an emphasis on the results obtained by means of long baseline optical stellar i

Externí odkaz: https://doaj.org/article/953c9744743247bd84d787ba9bcccf70

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Unveiling the traits of massive young stellar objects through a multi-scale survey?

Autor: A. J. Frost, W. J. de Wit, Stuart Lumsden, Rene D. Oudmaijer

Context. The rarity and deeply embedded nature of young massive stars has limited the understanding of the formation of stars with masses larger than 8 M⊙. Previous work has shown that complementing spectral energy distributions with interferometri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::001517cec019eb78593c575766bc7467
https://lirias.kuleuven.be/handle/123456789/675117

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