Zobrazeno 1 - 10
of 710
pro vyhledávání: '"Reggiani, M"'
Investigating 39 Galactic Wolf-Rayet stars with VLTI/GRAVITY: Uncovering A Long Period Binary Desert
Autor:
Deshmukh, K., Sana, H., Mérand, A., Bodensteiner, J., Bordier, E., Dsilva, K., Frost, A. J., Gosset, E., Langer, N., Bouquin, J. -B. Le, Lefever, R. R., Mahy, L., Patrick, L. R., Reggiani, M., Sander, A. A. C., Shenar, T., Tramper, F., Villaseñor, J. I., Waisberg, I.
Wolf-Rayet stars (WRs) are thought to be the final evolutionary stages of massive stars and immediate progenitors of stellar-mass black holes. Their multiplicity forms an important anchor point in single and binary population models for predicting gr
Externí odkaz:
http://arxiv.org/abs/2409.15212
Autor:
Bodensteiner, J., Heida, M., Abdul-Masih, M., Baade, D., Banyard, G., Bowman, D. M., Fabry, M., Frost, A., Mahy, L., Marchant, P., Mérand, A., Reggiani, M., Rivinius, Th., Sana, H., Selman, F., Shenar, T.
Publikováno v:
The Messenger, 2022, vol. 186, p. 3-9
While the number of stellar-mass black holes detected in X-rays or as gravitational wave sources is steadily increasing, the known population remains orders of magnitude smaller than predicted by stellar evolution theory. A significant fraction of st
Externí odkaz:
http://arxiv.org/abs/2207.00366
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
Autor:
Frost, A. J., Bodensteiner, J., Rivinius, Th., Baade, D., Merand, A., Selman, F., Abdul-Masih, M., Banyard, G., Bordier, E., Dsilva, K., Hawcroft, C., Mahy, L., Reggiani, M., Shenar, T., Cabezas, M., Hadrava, P., Heida, M., Klement, R., Sana, H.
Publikováno v:
A&A, Volume 659, March 2022, L3, 12, Letters to the Editor
Two scenarios have been proposed to match the existing observational constraints of the object HR 6819. The system could consist of a close inner B-type giant plus a black hole (BH) binary with an additional Be companion in a wide orbit. Alternativel
Externí odkaz:
http://arxiv.org/abs/2203.01359
Autor:
Reggiani, M., Rainot, A., Sana, H., Almeida, L. A., Caballero-Nieves, S., Kratter, K., Lacour, S., LeBouquin, J. -B., Zinnecker, H.
Publikováno v:
A&A 660, A122 (2022)
Almost all massive stars are part of a binary system. Given the wide range of separations at which these companions are found, several observational techniques have been adopted to characterize them, but contrasts greater than 4 in the H-band have ne
Externí odkaz:
http://arxiv.org/abs/2112.10831
Autor:
Mahy, L., Lanthermann, C., Hutsemékers, D., Kluska, J., Lobel, A., Manick, R., Miszalski, B., Reggiani, M., Sana, H., Gosset, E.
Publikováno v:
A&A 657, A4 (2022)
Context. Luminous Blue Variables (LBVs) are thought to be in a transitory phase between O stars on the main-sequence and the Wolf-Rayet stage. Recent studies suggest that they might be formed through binary interaction. Only a few are known in binary
Externí odkaz:
http://arxiv.org/abs/2105.12380
Autor:
Christiaens, V., Ubeira-Gabellini, M. -G., Cánovas, H., Delorme, P., Pairet, B., Absil, O., Casassus, S., Girard, J. H., Zurlo, A., Aoyama, Y., Marleau, G-D., Spina, L., van der Marel, N., Cieza, L., Lodato, G., Pérez, S., Pinte, C., Price, D. J., Reggiani, M.
Understanding how giant planets form requires observational input from directly imaged protoplanets. We used VLT/NACO and VLT/SPHERE to search for companions in the transition disc of 2MASS J19005804-3645048 (hereafter CrA-9), an accreting M0.75 dwar
Externí odkaz:
http://arxiv.org/abs/2102.10288
Autor:
Hagelberg, J., Engler, N., Fontanive, C., Daemgen, S., Quanz, S. P., Kühn, J., Reggiani, M., Meyer, M., Jayawardhana, R., Kostov, V.
Publikováno v:
A&A 643, A98 (2020)
Recent surveys indicate that planets in binary systems are more abundant than previously thought, which is in agreement with theoretical work on disc dynamics and planet formation in binaries. In order to measure the abundance and physical characteri
Externí odkaz:
http://arxiv.org/abs/2009.14528
Autor:
Bodensteiner, J., Shenar, T., Mahy, L., Fabry, M., Marchant, P., Abdul-Masih, M., Banyard, G., Bowman, D. M., Dsilva, K., Frost, A. J., Hawcroft, C., Reggiani, M., Sana, H.
Publikováno v:
A&A 641, A43 (2020)
HR 6819 was recently proposed to be a triple system consisting of an inner B-type giant + black hole binary with an orbital period of 40d and an outer Be tertiary. This interpretation is mainly based on two inferences: that the emission attributed to
Externí odkaz:
http://arxiv.org/abs/2006.10770
Autor:
Rainot, A., Reggiani, M., Sana, H., Bodensteiner, J., Gomez-Gonzalez, C. A., Absil, O., Christiaens, V., Delorme, P., Almeida, L. A., Caballero-Nieves, S., De Ridder, J., Kratter, K., Lacour, S., Bouquin, J. -B. Le, Pueyo, L., Zinnecker, H.
Publikováno v:
A&A 640, A15 (2020)
Massive stars like company. However, low-mass companions have remained extremely difficult to detect at angular separations ($\rho$) smaller than 1" (~1000-3000 au considering typical distance to nearby massive stars) given the large brightness contr
Externí odkaz:
http://arxiv.org/abs/2006.01914