Zobrazeno 1 - 10
of 337
pro vyhledávání: '"Ragland, S."'
Enhanced high-dispersion coronagraphy with KPIC phase II: design, assembly and status of sub-modules
Autor:
Jovanovic, N., Calvin, B., Porter, M., Schofield, T., Wang, J., Roberts, M., Ruane, G., Wallace, J. K., Bartos, R., Pezzato, J., Colborn, J., Delorme, J. R., Echeverri, D., Mawet, D., Bond, C. Z., Cetre, S., Lilley, S., Ragland, S., Wizinowich, P., Jensen-Clem, R.
The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument for high-dispersion coronagraphy in the K and L bands on Keck. This instrument will provide the first high resolution (R$>$30,000) spectra of known directly imaged exoplane
Externí odkaz:
http://arxiv.org/abs/2012.06638
Autor:
Perrin, G., Ridgway, S. T., Lacour, S., Haubois, X., Thiebaut, E., Berger, J. P., Lacasse, M. G., Millan-Gabet, R., Monnier, J. D., Pedretti, E., Ragland, S., Traub, W.
Publikováno v:
A&A 642, A82 (2020)
We report Multi-telescope interferometric measurements taken with the Interferometric Optical Telescope Array (IOTA) to provide imagery of the LPV Mira in the H-band. This wavelength region is well suited to studying mass loss given the low continuum
Externí odkaz:
http://arxiv.org/abs/2008.09801
Autor:
Jovanovic, N., Delorme, J. R., Bond, C. Z., Cetre, S., Mawet, D., Echeverri, D., Wallace, J. K., Bartos, R., Lilley, S., Ragland, S., Ruane, G., Wizinowich, P., Chun, M., Wang, J., Fitzgerald, M., Matthews, K., Pezzato, J., Calvin, B., Millar-Blanchaer, M., Martin, E. C., Wetherell, E., Wang, E., Jacobson, S., Warmbier, E., Lockhart, C., Hall, D., Jensen-Clem, R., McEwen, E.
The Keck Planet Imager and Characterizer (KPIC) is an upgrade to the Keck II adaptive optics system enabling high contrast imaging and high-resolution spectroscopic characterization of giant exoplanets in the mid-infrared (2-5 microns). The KPIC inst
Externí odkaz:
http://arxiv.org/abs/1909.04541
Autor:
Beltramo-Martin, O., Correia, C. M., Ragland, S., Jolissaint, L., Neichel, B., Fusco, T., Wizinowich, P. L.
In order to enhance accuracy of astrophysical estimates obtained on Adaptive-optics (AO) images, such as photometry and astrometry, we investigate a new concept to constrain the Point Spread Function (PSF) model called PSF Reconstruction and Identifi
Externí odkaz:
http://arxiv.org/abs/1903.02772
Autor:
Woillez, J., Akeson, R., Colavita, M., Eisner, J., Ghez, A., Graham, J., Hillenbrand, L., Millan-Gabet, R., Monnier, J., Pott, J. -U., Ragland, S., Wizinowich, P., Appleby, E., Berkey, B., Cooper, A., Felizardo, C., Herstein, J., Hrynevych, M., Martin, O., Medeiros, D., Morrison, D., Panteleeva, T., Smith, B., Summers, K., Tsubota, K., Tyau, C., Wetherell, E.
Publikováno v:
Proceedings of the SPIE, Volume 7734, pp. 773412 (2010)
ASTRA (ASTrometric and phase-Referencing Astronomy) is an upgrade to the existing Keck Interferometer which aims at providing new self-phase referencing (high spectral resolution observation of YSOs), dual-field phase referencing (sensitive AGN obser
Externí odkaz:
http://arxiv.org/abs/1208.3272
Autor:
Jackson, Kathryn J., Schmidt, Dirk, Vernet, Elise, Brusa, G., Zhang, X., Lefebvre, M., Tintori, M., Smithwright, M., Guerra, J. C., Miller, D., Taylor, G., Ragland, S.
Publikováno v:
Proceedings of SPIE; August 2024, Vol. 13097 Issue: 1 p130972M-130972M-10, 12966239p
Autor:
Jackson, Kathryn J., Schmidt, Dirk, Vernet, Elise, Guerra, J. C., Ragland, S., Mechtley, B., Brusa, G., Miller, D., Power, J., Taylor, G., Zhang, X., Pinna, E.
Publikováno v:
Proceedings of SPIE; August 2024, Vol. 13097 Issue: 1 p130977L-130977L-5, 1178799p
Autor:
Ragland, S., Ohnaka, K., Hillenbrand, L., Ridgway, S. T., Colavita, M. M., Akeson, R. L., Cotton, W., Danchi, W. C., Hrynevych, M., Millan-Gabet, R., Traub, W. A.
We present the first N-band nulling plus K- and L-band V2 observations of a young stellar object, MWC325, taken with the 85 m baseline Keck Interferometer. The Keck nuller was designed for the study of faint dust signatures associated with debris dis
Externí odkaz:
http://arxiv.org/abs/1111.1813
Autor:
Millan-Gabet, R., Serabyn, E., Mennesson, B., Traub, W. A., Barry, R. K., Danchi, W. C., Kuchner, M., Ragland, S., Hrynevych, M., Woillez, J., Stapelfeldt, K., Bryden, G., Colavita, M. M., Booth, A. J.
The Keck Interferometer Nuller (KIN) was used to survey 25 nearby main sequence stars in the mid-infrared, in order to assess the prevalence of warm circumstellar (exozodiacal) dust around nearby solar-type stars. The KIN measures circumstellar emiss
Externí odkaz:
http://arxiv.org/abs/1104.1382
Autor:
Berger, J. -P., Monnier, J. D., Millan-Gabet, R., Renard, S., Pedretti, E., Traub, W., Bechet, C., Benisty, M., Carleton, N., Haguenauer, P., Kern, P., Labeye, P., Longa, F., Lacasse, M., Malbet, F., Perraut, K., Ragland, S., Schloerb, P., Schuller, P. A., Thiébaut, E.
Young and close multiple systems are unique laboratories to probe the initial dynamical interactions between forming stellar systems and their dust and gas environment. Their study is a key building block to understanding the high frequency of main-s
Externí odkaz:
http://arxiv.org/abs/1103.3888