The Bi-O-edge wavefront sensor: How Foucault-knife-edge variants can boost eXtreme Adaptive Optics

Autor: Vérinaud, C., Heritier, C. T., Kasper, M., Tallon, M.

Publikováno v: A&A 682, A27 (2024)

Direct detection of exoplanets around nearby stars requires advanced Adaptive Optics (AO) systems. High order systems are needed to reach high Strehl Ratio (SR) in near infrared and optical wavelengths on future Giant Segmented Mirror Telescopes (GSM

Externí odkaz: http://arxiv.org/abs/2309.07485

Deep Contrast and Companion Detection Using the EvWaCo Testbed Equipped with an Achromatic Focal Plane Mask and an Adjustable Inner Working Angle

Autor: Alagao, M. A., Kawinkij, A., Buisset, C., Prasit, A., Lépine, T., Rabbia, Y., Berdeu, A., Thiébaut, É., Langlois, M., Tallon, M., Awiphan, S., Semenko, E., Rittipruk, P., Mkrtichian, D., Leckngam, A., Thuammasorn, G., Kaewsamoeta, P., Inpan, A., Kuha, T., Laoyang, A., Somboonchai, W., Kanthum, S., Poshyachinda, S., Soonthornthum, B.

The evanescent wave coronagraph uses the principle of frustrated total internal reflection (FTIR) to suppress the light coming from the star and study its close environment. Its focal plane mask is composed of a lens and a prism placed in contact wit

Externí odkaz: http://arxiv.org/abs/2103.10044

SPHERE+: Imaging young Jupiters down to the snowline

Autor: Boccaletti, A., Chauvin, G., Mouillet, D., Absil, O., Allard, F., Antoniucci, S., Augereau, J. -C., Barge, P., Baruffolo, A., Baudino, J. -L., Baudoz, P., Beaulieu, M., Benisty, M., Beuzit, J. -L., Bianco, A., Biller, B., Bonavita, B., Bonnefoy, M., Bos, S., Bouret, J. -C., Brandner, W., Buchschache, N., Carry, B., Cantalloube, F., Cascone, E., Carlotti, A., Charnay, B., Chiavassa, A., Choquet, E., Clenet, Y., Crida, A., De Boer, J., De Caprio, V., Desidera, S., Desert, J. -M., Delisle, J. -B., Delorme, P., Dohlen, K., Doelman, D., Dominik, C., Orazi, V. D, Dougados, C., Doute, S., Fedele, D., Feldt, M., Ferreira, F., Fontanive, C., Fusco, T., Galicher, R., Garufi, A., Gendron, E., Ghedina, A., Ginski, C., Gonzalez, J. -F., Gratadour, D., Gratton, R., Guillot, T., Haffert, S., Hagelberg, J., Henning, T., Huby, E., Janson, M., Kamp, I., Keller, C., Kenworthy, M., Kervella, P., Kral, Q., Kuhn, J., Lagadec, E., Laibe, G., Langlois, M., Lagrange, A. -M., Launhardt, R., Leboulleux, L., Coroller, H. Le, Causi, G. Li, Loupias, M., Maire, A. L., Marleau, G., Martinache, F., Martinez, P., Mary, D., Mattioli, M., Mazoyer, J., Meheut, H., Menard, F., Mesa, D., Meunier, N., Miguel, Y., Milli, J., Min, M., Molliere, P., Mordasini, C., Moretto, G., Mugnier, L., Arena, G. Muro, Nardetto, N., Diaye, M. N, Nesvadba, N., Pedichini, F., Pinilla, P., Por, E., Potier, A., Quanz, S., Rameau, J., Roelfsema, R., Rouan, D., Rigliaco, E., Salasnich, B., Samland, M., Sauvage, J. -F., Schmid, H. -M., Segransan, D., Snellen, I., Snik, F., Soulez, F., Stadler, E., Stam, D., Tallon, M., Thebault, P., Thiebaut, E., Tschudi, C., Udry, S., van Holstein, R., Vernazza, P., Vidal, F., Vigan, A., Waters, R., Wildi, F., Willson, M., Zanutta, A., Zavagno, A., Zurlo, A.

SPHERE (Beuzit et al,. 2019) has now been in operation at the VLT for more than 5 years, demonstrating a high level of performance. SPHERE has produced outstanding results using a variety of operating modes, primarily in the field of direct imaging o

Externí odkaz: http://arxiv.org/abs/2003.05714

Structure of Herbig AeBe disks at the milliarcsecond scale A statistical survey in the H band using PIONIER-VLTI

Autor: Lazareff, B., Berger, J. -P., Kluska, J., Bouquin, J. -B. Le, Benisty, M., Malbet, F., Koen, C., Pinte, C., Thi, W. -F., Absil, O., Baron, F., Delboulbé, A., Duvert, G., Isella, A., Jocou, L., Juhasz, A., Kraus, S., Lachaume, R., Ménard, F., Millan-Gabet, R., Monnier, J. D., Moulin, T., Perraut, K., Rochat, S., Soulez, F., Tallon, M., Thiébaut, E., Traub, W., Zins, G.

Publikováno v: A&A 599, A85 (2017)

Context. It is now generally accepted that the near-infrared excess of Herbig AeBe stars originates in the dust of a circumstellar disk. Aims. The aims of this article are to infer the radial and vertical structure of these disks at scales of order o

Externí odkaz: http://arxiv.org/abs/1611.08428

An investigation of the close environment of beta Cep with the VEGA/CHARA interferometer

Autor: Nardetto, N., Mourard, D., Tallon-Bosc, I., Tallon, M., Berio, P., Chapellier, E., Bonneau, D., Chesneau, O., Mathias, P., Perraut, K., Stee, P., Blazit, A., Clausse, J. M., Delaa, O., Marcotto, A., Millour, F., Roussel, A., Spang, A., McAlister, H., Brummelaar, T. ten, Sturmann, J., Sturmann, L., Turner, N., Farrington, C., Goldfinger, P. J.

High-precision interferometric measurements of pulsating stars help to characterize their close environment. In 1974, a close companion was discovered around the pulsating star beta Cep using the speckle interferometry technique and features at the l

Externí odkaz: http://arxiv.org/abs/1010.2146