2MASS J20261584–2943124: AN UNRESOLVED L0.5 + T6 SPECTRAL BINARY by Gelino, Christopher R., Burgasser, Adam J.

“…Laser guide star adaptive optics imaging observations with Keck/NIRC2 fail to resolve the source, indicating a maximum separation at the observing epoch of 0['' over .]25, or a projected separation of 9 AU assuming a distance of 36 ± 5 pc. …”
Get full text

THE PHASES DIFFERENTIAL ASTROMETRY DATA ARCHIVE. II. UPDATED BINARY STAR ORBITS AND A LONG PERIOD ECLIPSING BINARY by Muterspaugh, Matthew W., Hartkopf, William I., Lane, Benjamin F., O’Connell, J., Williamson, M., Kulkarni, S. R., Konacki, Maciej, Burke, Bernard F., Colavita, M. M., Shao, M., Wiktorowicz, Sloane J.

“…Differential astrometry measurements from the Palomar High-precision Astrometric Search for Exoplanet Systems have been combined with lower precision single-aperture measurements covering a much longer timespan (from eyepiece measurements, speckle interferometry, and adaptive optics) to determine improved visual orbits for 20 binary stars. …”
Get full text
Get full text

Liquid crystal spatial light modulator : characterization and applications by Kapil Dev.

“…Liquid crystal spatial light modulator (LCSLM) is an important active and dynamic optical element with a wide range of applications in the fields of optical displays, optical metrology, optical data processing, adaptive optics, bio-imaging etc. Modern LCSLMs have high fill factor, high switching speeds and can provide amplitude and phase modulation of an optical wavefront passing through or reflecting from its active area in real time. …”
Get full text

CoRoT-22 b: a validated 4.9 RE exoplanet in 10-day orbit by Moutou, C, Almenara, J, Diaz, R, Alonso, R, Deleuil, M, Guenther, E, Pasternacki, T, Aigrain, S, Baglin, A, Barge, P, Bonomo, A, Borde, P, Bouchy, F, Cabrera, J, Carpano, S, Cochran, W, Csizmadia, S, Deeg, H, Dvorak, R, Endl, M, Erikson, A, Ferraz-Mello, S, Gandolfi, D, Guillot, T, Artzes, A

“…They are based on observing constraints from radial-velocity spectroscopy, adaptive optics imaging and the CoRoT transit shape, as well as from priors on stellar populations, planet and multiple stellar systems frequency. …”

The black hole in the most massive ultracompact dwarf galaxy M59-UCD3 by Ahn, C, Seth, A, Cappellari, M, al., E

“…We examine the internal properties of the most massive ultracompact dwarf galaxy (UCD), M59-UCD3, by combining adaptive-optics-assisted near-IR integral field spectroscopy from Gemini/NIFS and Hubble Space Telescope (HST) imaging. …”

The central parsecs of Centaurus A: High Excitation Gas, a Molecular Disk, and the Mass of the Black Hole by Neumayer, N, Cappellari, M, Reunanen, J, Rix, H, Werf, P, Zeeuw, P, Davies, R

“…We present two-dimensional gas-kinematic maps of the central region in Centaurus A. The adaptive optics (AO) assisted SINFONI data from the VLT have a resolution of 0.12" in K-band. …”

The E-ELT Multi-Object Spectrograph: latest news from MOSAIC by Hammer, F, Morris, S, Kaper, L, Barbuy, B, Cuby, J, Roth, M, Jagourel, P, Evans, C, Puech, M, Fitzsimons, E, Dalton, G, Rodrigues, M

“…MOSAIC will also offer the unique capability of more than 10 `high-definition' (multi-object adaptive optics, MOAO) integral-field units, optimised to investigate the physics of the sources of reionization. …”

Gemini imaging of QSO host galaxies at z~2 by Croom, S, Schade, D, Boyle, B, Shanks, T, Miller, L, Smith, R

“…We present results of a Gemini adaptive optics (AO) imaging program to investigate the host galaxies of typical QSOs at z~2. …”

The gemini NICI planet-finding campaign by Liu, M, Wahhaj, Z, Biller, B, Nielsen, E, Chun, M, Close, L, Ftaclas, C, Hartung, M, Hayward, T, Clarke, F, Reid, I, Shkolnik, E, Tecza, M, Thatte, N, Alencar, S, Artymowicz, P, Boss, A, Burrows, A, De Gouveia Dal Pino, E, Gregorio-Hetem, J, Ida, S, Kuchner, M, Lin, D, Toomey, D

“…NICI is the first instrument on a large telescope designed from the outset for high-contrast imaging, comprising a high-performance curvature adaptive optics (AO) system with a simultaneous dual-channel coronagraphic imager. …”

Latitudinal variation in the abundance of methane (CH4) above the clouds in Neptune's atmosphere from VLT/MUSE Narrow Field Mode Observations by Irwin, P, Toledo Carrasco, D, Braude, A, Bacon, R, Weilbacher, P, Teanby, N, Fletcher, L, Orton, G

“…Observations of Neptune, made in 2018 using the new Narrow Field Adaptive Optics mode of the Multi Unit Spectroscopic Explorer (MUSE) instrument at the Very Large Telescope (VLT) from 0.48 to 0.93 μm, are analysed here to determine the latitudinal and vertical distribution of cloud opacity and methane abundance in Neptune's observable troposphere (0.1–∼ 3bar). …”

THE NGC 404 NUCLEUS: STAR CLUSTER AND POSSIBLE INTERMEDIATE-MASS BLACK HOLE by Seth, A, Cappellari, M, Neumayer, N, Caldwell, N, Bastian, N, Olsen, K, Blum, R, Debattista, V, McDermid, R, Puzia, T, Stephens, A

“…We examine the nuclear morphology, kinematics, and stellar populations in nearby S0 galaxy NGC 404 using a combination of adaptive optics assisted near-IR integral-field spectroscopy, optical spectroscopy, and Hubble Space Telescope imaging. …”

Gemini imaging of QSO host galaxies at z ∼ 2 by Croom, S, Schade, D, Boyle, B, Shanks, T, Miller, L, Smith, R

“…We present results of a Gemini adaptive optics (AO) imaging program to investigate the host galaxies of typical QSOs at z ∼ 2. …”

Improved dynamical constraints on the masses of the central black holes in nearby low-mass early-type galactic nuclei and the first black hole determination for NGC 205 by Nguyen, D, Seth, A, Neumayer, N, Cappellari, M, al., E

“…We then create new mass models from HST imaging and combined with adaptive optics kinematics, we use Jeans dynamical models to constrain their BH masses. …”

Transiting exoplanets from the CoRoT space mission VIII. CoRoT-7b: the first Super-Earth with measured radius by Leger, A, Rouan, D, Schneider, J, Barge, P, Fridlund, M, Samuel, B, Ollivier, M, Guenther, E, Deleuil, M, Deeg, H, Auvergne, M, Alonso, R, Aigrain, S, Alapini, A, Almenara, J, Baglin, A, Barbieri, M, Bruntt, H, Borde, P, Bouchy, F, Cabrera, J, Catala, C, Carone, L, Carpano, S, Csizmadia, S

“…We use CoRoT color information, good angular resolution ground-based photometric observations in- and out- of transit, adaptive optics imaging, near-infrared spectroscopy and preliminary results from Radial Velocity measurements, to test the diluted eclipsing binary scenarios. …”

Observing bright stars and their planets from the Earth and from space by Pope, B

“…I go on to demonstrate kernel phase for the first time from the ground using the Palomar Hale 200-Inch Telescope, as a test case for the extreme adaptive optics instruments SPHERE and GPI.</p> <p>The <em>Kepler</em> satellite and its successor, the <em>K2</em> mission, have been crucial to our understanding both of exoplanets, and via asteroseismology, of stellar physics. …”

SPIFFI: A high-resolution near-infrared imaging spectrometer by Tecza, M, Thatte, N, Krabbe, A, Tacconi-Garman, L

“…It can be used on 4 to 8 meter class telescopes with a maximum pixel scale of 0.5 arcsec and with adaptive optics pixel scales, Nyquist sampling the point spread function of the telescope.A fiber bundle of 1024 silica/silica fibers rearranges the two-dimensional field of view into the one-dimensional entrance slit of the spectrometer. …”

A low upper-mass limit for the central black hole in the late-type galaxy NGC 4414 by Thater, S, Krajnovic, D, Bourne, M, Cappellari, M, de Zeeuw, T, Emsellem, E, Magorrian, J, McDermid, R, Sarzi, M, van de Ven, G

“…Using natural guide star adaptive optics assisted observations with the Gemini Near-Infrared Integral Field Spectrometer (NIFS) and the natural seeing Gemini MultiObject Spectrographs-North (GMOS), we derived two-dimensional stellar kinematic maps of NGC 4414 covering the central 1.5 arcsec and 10 arcsec, respectively, at a NIFS spatial resolution of 0.13 arcsec. …”

Dynamic changes in cell size and corresponding cell fate after optic nerve injury by Benjamin M. Davis, Li Guo, Nivedita Ravindran, Ehtesham Shamsher, Veerle Baekelandt, Hannah Mitchell, Anil A. Bharath, Lies De Groef, M. Francesca Cordeiro

“…Abstract Identifying disease-specific patterns of retinal cell loss in pathological conditions has been highlighted by the emergence of techniques such as Detection of Apoptotic Retinal Cells and Adaptive Optics confocal Scanning Laser Ophthalmoscopy which have enabled single-cell visualisation in vivo. …”
Get full text

Retinal Thickening and Photoreceptor Loss in HIV Eyes without Retinitis. by Cheryl A Arcinue, Dirk-Uwe Bartsch, Sharif Y El-Emam, Feiyan Ma, Aubrey Doede, Lucie Sharpsten, Maria Laura Gomez, William R Freeman

“…RESULTS:Twenty-four eyes of 12 patients (n = 6 HIV-positive and 6 HIV-negative) were imaged with the adaptive optics camera. In each of the regions of interest studied (nasal, temporal, superior, inferior), the HIV group had significantly less mean cone photoreceptor density compared with age-matched controls (difference range, 4,308-6,872 cones/mm2). …”
Get full text

Analysis of Optical Turbulence over the South China Sea Using Balloon-Borne Microthermal Data and ERA5 Data by Manman Xu, Shiyong Shao, Ningquan Weng, Qing Liu

“…It is very useful for adaptive optics (AO) systems to have appropriate knowledge of optical turbulence. …”
Get full text