Zobrazeno 1 - 10
of 377
pro vyhledávání: '"Defrère D"'
Autor:
Garreau, G., Bigioli, A., Laugier, R., La Torre, B., Martinod, M-A., Missiaen, K., Morren, J., Raskin, G., Salman, M., Gross, S., Ireland, M., Joó, A. P., Labadie, L., Madden, S., Mazzoli, A., Medgyesi, G., Sanny, A., Taras, A., Vandenbussche, B., Defrère, D.
Asgard/NOTT is an ERC-funded project hosted at KU Leuven and is part of a new visitor instrumental suite, called Asgard, under preparation for the Very Large Telescope Interferometer (VLTI). Leveraging nulling capabilities and the long VLTI baselines
Externí odkaz:
http://arxiv.org/abs/2407.08557
Autor:
Berdeu, Anthony, Bonnet, H., Bouquin, J. -B. Le, Édouard, C., Gomes, T., Shchekaturov, P., Dembet, R., Paumard, T., Oberti, S., Kolb, J., Millour, F., Berio, P., Lai, O., Eisenhauer, F., Garcia, P., Straubmeier, C., Kreidberg, L., Hönig, S., Defrère, D.
Publikováno v:
Astronomy and Astrophysics - A&A, 2024, 687, pp.A157
Context. The GRAVITY+ upgrade implies a complete renewal of its adaptive optics (AO) systems. Its complex design, featuring moving components between the deformable mirrors and the wavefront sensors, requires the monitoring and auto-calibrating of th
Externí odkaz:
http://arxiv.org/abs/2407.07423
Autor:
Pourré, N., Winterhalder, T. O., Bouquin, J. -B. Le, Lacour, S., Bidot, A., Nowak, M., Maire, A. -L., Mouillet, D., Babusiaux, C., Woillez, J., Abuter, R., Amorim, A., Asensio-Torres, R., Balmer, W. O., Benisty, M., Berger, J. -P., Beust, H., Blunt, S., Boccaletti, A., Bonnefoy, M., Bonnet, H., Bordoni, M. S., Bourdarot, G., Brandner, W., Cantalloube, F., Caselli, P., Charnay, B., Chauvin, G., Chavez, A., Choquet, E., Christiaens, V., Clénet, Y., Foresto, V. Coudé du, Cridland, A., Davies, R., Defrère, D., Dembet, R., Dexter, J., Drescher, A., Duvert, G., Eckart, A., Eisenhauer, F., Schreiber, N. M. Föster, Garcia, P., Lopez, R. Garcia, Gendron, E., Genzel, R., Gillessen, S., Girard, J. H., Gonte, F., Grant, S., Haubois, X., Heißel, G., Henning, Th., Hinkley, S., Hippler, S., Hönig, S. F., Houllé, M., Hubert, Z., Jocou, L., Kammerer, J., Kenworthy, M., Keppler, M., Kervella, P., Kreidberg, L., Kurtovic, N. T., Lagrange, A. -M., Lapeyrère, V., Lutz, D., Mang, F., Marleau, G. -D., Mérand, A., Millour, F., Mollière, P., Monnier, J. D., Mordasini, C., Nasedkin, E., Oberti, S., Ott, T., Otten, G. P. L., Paladini, C., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Pueyo, L., Ribeiro, D. C., Rickman, E., Rustamkulov, Z., Shangguan, J., Shimizu, T., Sing, D., Soulez, F., Stadler, J., Stolker, T., Straub, O., Straubmeier, C., Sturm, E., Sykes, C., Tacconi, L. J., van Dishoeck, E. F., Vigan, A., Vincent, F., von Fellenberg, S. D., Wang, J., Widmann, F., Yazici, S., Collaboration, the GRAVITY, Abad, J. A., Carpentier, E. Aller, Alonso, J., Andolfato, L., Barriga, P., Beuzit, J. -L., Bourget, P., Brast, R., Caniguante, L., Cottalorda, E., Darré, P., Delabre, B., Delboulbé, A., Delplancke-Ströbele, F., Donaldson, R., Dorn, R., Dupuy, C., Egner, S., Fischer, G., Frank, C., Fuenteseca, E., Gitton, P., Guerlet, T., Guieu, S., Gutierrez, P., Haguenauer, P., Haimerl, A., Heritier, C. T., Huber, S., Hubin, N., Jolley, P., Kirchbauer, J. -P., Kolb, J., Kosmalski, J., Krempl, P., Louarn, M. Le, Lilley, P., Lopez, B., Magnard, Y., Mclay, S., Meilland, A., Meister, A., Moulin, T., Pasquini, L., Paufique, J., Percheron, I., Pettazzi, L., Phan, D., Pirani, W., Quentin, J., Rakich, A., Ridings, R., Reyes, J., Rochat, S., Schmid, C., Schuhler, N., Shchekaturov, P., Seidel, M., Soenke, C., Stadler, E., Stephan, C., Suárez, M., Todorovic, M., Valdes, G., Verinaud, C., Zins, G., Zúñiga-Fernández, S., Collaboration, the NAOMI
Since 2019, GRAVITY has provided direct observations of giant planets and brown dwarfs at separations of down to 95 mas from the host star. Some of these observations have provided the first direct confirmation of companions previously detected by in
Externí odkaz:
http://arxiv.org/abs/2406.04003
Autor:
Nowak, M., Lacour, S., Abuter, R., Woillez, J., Dembet, R., Bordoni, M. S., Bourdarot, G., Courtney-Barrer, B., Defrère, D., Drescher, A., Eisenhauer, F., Fabricius, M., Feuchtgruber, H., Frahm, R., Garcia, P., Gillessen, S., Gopinath, V., Graf, J., Hoenig, S., Kreidberg, L., Laugier, R., Bouquin, J. B. Le, Lutz, D., Mang, F., Millour, F., More, N., Morujão, N., Ott, T., Paumard, T., Perrin, G., Rau, C., Ribeiro, D. C., Shangguan, J., Shimizu, T., Soulez, F., Straubmeier, C., Widmann, F., Wolff, B.
Aims. As part of the ongoing GRAVITY+ upgrade of the Very Large Telescope Interferometer infrastructure, we aim to improve the performance of the GRAVITY Fringe-Tracker, and to enable its use by other instruments. Methods. We modify the group delay c
Externí odkaz:
http://arxiv.org/abs/2402.03594
Autor:
Abuter, R., Allouche, F., Amorim, A., Bailet, C., Berdeu, A., Berger, J. -P., Berio, P., Bigioli, A., Boebion, O., Bolzer, M. -L., Bonnet, H., Bourdarot, G., Bourget, P., Brandner, W., Cao, Y., Conzelmann, R., Comin, M., Clénet, Y., Courtney-Barrer, B., Davies, R., Defrère, D., Delboulbé, A., Delplancke-Ströbele, F., Dembet, R., Dexter, J., de Zeeuw, P. T., Drescher, A., Eckart, A., Édouard, C., Eisenhauer, F., Fabricius, M., Feuchtgruber, H., Finger, G., Schreiber, N. M. Förster, Garcia, P., Lopez, R. Garcia, Gao, F., Gendron, E., Genzel, R., Gil, J. P., Gillessen, S., Gomes, T., Gonté, F., Gouvret, C., Guajardo, P., Guieu, S., Hackenberg, W., Haddad, N., Hartl, M., Haubois, X., Haußmann, F., Heißel, G., Henning, Th., Hippler, S., Hönig, S. F., Horrobin, M., Hubin, N., Jacqmart, E., Jocou, L., Kaufer, A., Kervella, P., Kolb, J., Korhonen, H., Lacour, S., Lagarde, S., Lai, O., Lapeyrère, V., Laugier, R., Bouquin, J. -B. Le, Leftley, J., Léna, P., Lewis, S., Liu, D., Lopez, B., Lutz, D., Magnard, Y., Mang, F., Marcotto, A., Maurel, D., Mérand, A., Millour, F., More, N., Netzer, H., Nowacki, H., Nowak, M., Oberti, S., Ott, T., Pallanca, L., Paumard, T., Perraut, K., Perrin, G., Petrov, R., Pfuhl, O., Pourré, N., Rabien, S., Rau, C., Riquelme, M., Robbe-Dubois, S., Rochat, S., Salman, M., Sanchez-Bermudez, J., Santos, D. J. D., Scheithauer, S., Schöller, M., Schubert, J., Schuhler, N., Shangguan, J., Shchekaturov, P., Shimizu, T. T., Sevin, A., Soulez, F., Spang, A., Stadler, E., Sternberg, A., Straubmeier, C., Sturm, E., Sykes, C., Tacconi, L. J., Tristram, K. R. W., Vincent, F., von Fellenberg, S., Uysal, S., Widmann, F., Wieprecht, E., Wiezorrek, E., Woillez, J., Zins, G.
Tight relationships exist in the local universe between the central stellar properties of galaxies and the mass of their supermassive black hole. These suggest galaxies and black holes co-evolve, with the main regulation mechanism being energetic fee
Externí odkaz:
http://arxiv.org/abs/2401.14567
Autor:
GRAVITY Collaboration, Foschi, A., Abuter, R., Dayem, K. Abd El, Aimar, N., Seoane, P. Amaro, Amorim, A., Berger, J. P., Bonnet, H., Bourdarot, G., Brandner, W., Davies, R., de Zeeuw, P. T., Defrère, D., Dexter, J., Drescher, A., Eckart, A., Eisenhauer, F., Schreiber, N. M. Förster, Garcia, P. J. V., Genzel, R., Gillessen, S., Gomes, T., Haubois, X., Heißel, G., Henning, Th., Jochum, L., Jocou, L., Kaufer, A., Kreidberg, L., Lacour, S., Lapeyrère, V., Bouquin, J. -B. Le, Léna, P., Lutz, D., Mang, F., Millour, F., Ott, T., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Rabien, S., Ribeiro, D. C., Bordoni, M. Sadun, Scheithauer, S., Shangguan, J., Shimizu, T., Stadler, J., Straubmeier, C., Sturm, E., Subroweit, M., Tacconi, L. J., Vincent, F., von Fellenberg, S., Woillez, J.
The dark compact object at the centre of the Milky Way is well established to be a supermassive black hole with mass $M_{\bullet} \sim 4.3 \cdot 10^6 \, M_{\odot}$, but the nature of its environment is still under debate. In this work, we used astrom
Externí odkaz:
http://arxiv.org/abs/2312.02653
Autor:
GRAVITY Collaboration, Foschi, A., Abuter, R., Aimar, N., Seoane, P. Amaro, Amorim, A., Bauböck, M., Berger, J. P., Bonnet, H., Bourdarot, G., Brandner, W., Cardoso, V., Clénet, Y., Dallilar, Y., Davies, R., de Zeeuw, P. T., Defrère, D., Dexter, J., Drescher, A., Eckart, A., Eisenhauer, F., Ferreira, M. C., Schreiber, N. M. Förster, Garcia, P. J. V., Gao, F., Gendron, E., Genzel, R., Gillessen, S., Gomes, T., Habibi, M., Haubois, X., Heißel, G., Henning, T., Hippler, S., Hönig, S. F., Horrobin, M., Jochum, L., Jocou, L., Kaufer, A., Kervella, P., Kreidberg, L., Lacour, S., Lapeyrère, V., Bouquin, J. B. Le, Léna, P., Lutz, D., Millour, F., Ott, T., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Rabien, S., Ribeiro, D. C., Bordoni, M. Sadun, Scheithauer, S., Shangguan, J., Shimizu, T., Stadler, J., Straub, O., Straubmeier, C., Sturm, E., Sykes, C., Tacconi, L. J., Vincent, F., von Fellenberg, S., Widmann, F., Wieprecht, E., Wiezorrek, E., Woillez, J.
The motion of S2, one of the stars closest to the Galactic Centre, has been measured accurately and used to study the compact object at the centre of the Milky Way. It is commonly accepted that this object is a supermassive black hole but the nature
Externí odkaz:
http://arxiv.org/abs/2306.17215
Autor:
Drescher, A., Fabricius, M., Shimizu, T., Woillez, J., Bourget, P., Widmann, F., Shangguan, J., Straubmeier, C., Horrobin, M., Schuhler, N., Eisenhauer, F., Gonté, F., Gillessen, S., Ott, T., Perrin, G., Paumard, T., Brandner, W., Kreidberg, L., Perraut, K., Bouquin, J. -B. Le, Garcia, P., Hönig, S., Defrère, D., Bourdarot, G., Feuchtgruber, H., Genzel, R., Hartl, M., Haussmann, F., Lutz, D., More, N., Rau, C., Sauter, J., Uysal, S., Wessely, P., Wieprecht, E., Wimmer, L., Yazici, S.
As part of the GRAVITY$^{+}$ project, the near-infrared beam combiner GRAVITY and the VLTI are currently undergoing a series of significant upgrades to further improve the performance and sky coverage. The instrumental changes will be transformationa
Externí odkaz:
http://arxiv.org/abs/2209.11602
Autor:
Widmann, F., Gillessen, S., Ott, T., Shimizu, T., Eisenhauer, F., Fabricius, M., Woillez, J., Gonté, F., Horrobin, M., Shangguan, J., Yazici, S., Perrin, G., Paumard, T., Brandner, W., Kreidberg, L., Straubmeier, C., Perraut, K., Bouquin, J. -B. Le, Garcia, P., Hönig, S., Defrère, D., Bourdarot, G., Drescher, A., Feuchtgruber, H., Genzel, R., Hartl, M., Lutz, D., More, N., Rau, C., Uysal, S., Wieprecht, E.
With the upgrade from GRAVITY to GRAVITY$^+$ the instrument will evolve into an all-sky interferometer that can observe faint targets, such as high redshift AGN. Observing the faintest targets requires reducing the noise sources in GRAVITY as much as
Externí odkaz:
http://arxiv.org/abs/2209.05593
Autor:
Collaboration, GRAVITY, Abuter, R., Allouche, F., Amorim, A., Bailet, C., Bauböck, M., Berger, J. -P., Berio, P., Bigioli, A., Boebion, O., Bolzer, M. L., Bonnet, H., Bourdarot, G., Bourget, P., Brandner, W., Clénet, Y., Courtney-Barrer, B., Dallilar, Y., Davies, R., Defrère, D., Delboulbé, A., Delplancke, F., Dembet, R., de Zeeuw, P. T., Drescher, A., Eckart, A., Édouard, C., Eisenhauer, F., Fabricius, M., Feuchtgruber, H., Finger, G., Schreiber, N. M. Förster, Garcia, E., Garcia, P., Gao, F., Gendron, E., Genzel, R., Gil, J. P., Gillessen, S., Gomes, T., Gonté, F., Gouvret, C., Guajardo, P., Guieu, S., Hartl, M., Haubois, X., Haußmann, F., Heißel, G., Henning, Th., Hippler, S., Hönig, S., Horrobin, M., Hubin, N., Jacqmart, E., Jochum, L., Jocou, L., Kaufer, A., Kervella, P., Korhonen, H., Kreidberg, L., Lacour, S., Lagarde, S., Lai, O., Lapeyrère, V., Laugier, R., Bouquin, J. -B. Le, Leftley, J., Léna, P., Lutz, D., Mang, F., Marcotto, A., Maurel, D., Mérand, A., Millour, F., More, N., Nowacki, H., Nowak, M., Oberti, S., Ott, T., Pallanca, L., Paumard, T., Perraut, K., Perrin, G., Petrov, R., Pfuhl, O., Pourré, N., Rabien, S., Rau, C., Robbe-Dubois, S., Rochat, S., Salman, M., Schöller, M., Schubert, J., Schuhler, N., Shangguan, J., Shimizu, T., Scheithauer, S., Sevin, A., Soulez, F., Spang, A., Stadler, E., Stadler, J., Straubmeier, C., Sturm, E., Tacconi, L. J., Tristram, K. R. W., Vincent, F., von Fellenberg, S., Uysal, S., Widmann, F., Wieprecht, E., Wiezorrek, E., Woillez, J., Yazici, S., Young, A., Zins, G.
Publikováno v:
A&A 665, A75 (2022)
GRAVITY+ is the upgrade of GRAVITY and the Very Large Telescope Interferometer (VLTI) with wide-separation fringe tracking, new adaptive optics, and laser guide stars on all four 8~m Unit Telescopes (UTs), for ever fainter, all-sky, high contrast, mi
Externí odkaz:
http://arxiv.org/abs/2206.00684