Results 131 to 140 of about 3,877 (212)

SCExAO/CHARIS Spectroscopic Characterization of Cloudy L/T Transition Companion Brown Dwarf HIP 93398 B

The Astrophysical Journal
Brown dwarfs with measured dynamical masses and spectra from direct imaging are benchmarks that anchor substellar atmosphere cooling and evolution models.
Briley L. Lewis, Yiting Li, Aidan Gibbs, Michael P. Fitzgerald, Timothy Brandt, Daniella Bardalez Gagliuffi, Qier An, Minghan Chen, Rachel Bowens-Rubin, Maïssa Salama, Julien Lozi, Rebecca Jensen-Clem, Ben Mazin   +12 more
doaj   +1 more source

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. VI. Evidence for Radially Evolving Icy Grains in the HD 141569A Disk via NIRCam Coronagraphic Imaging

The Astrophysical Journal
We present JWST NIRCam coronagraphic observations of the HD 141569A circumstellar disk, obtained as part of the JWST Early Release Science program. The observations recover the multi-ringed structure seen in previous shorter-wavelength observations, but ...
Maxwell A. Millar-Blanchaer, Élodie Choquet, Kellen Lawson, Sebastián Marino, Jens Kammerer, Aarynn L. Carter, Isabel Rebollido, Jarron M. Leisenring, Minjae Kim, Paul Kalas, Karl R Stapelfeldt, Sasha Hinkley, Mark Booth, Carol A. Grady, Elisabeth C. Matthews, Beth A. Biller, Andrew Skemer, Julien H. Girard, Schuyler G. Wolff, Kimberly Ward-Duong, Michael R. Meyer, Anthony Boccaletti, Eric Pantin, Brenda C. Matthews, Stanimir Metchev, Marshall D. Perrin, Christine H. Chen, Katie Crotts, Olivier Absil, William O. Balmer, Per Calissendorff, Gabriele Cugno, Thayne Currie, Camilla Danielski, Kielan K. W. Hoch, Markus Janson, Elena Manjavacas, Pierre-Olivier Lagage, Ben J. Sutlieff, Shrishmoy Ray, Bin B. Ren, Emily Rickman, Genaro Suárez, Christopher A. Theissen, Taichi Uyama, Andreas Quirrenbach, Jason J. Wang, Niall Whiteford, Mark C. Wyatt, Alice Zurlo, (The JWST ERS Collaboration)   +50 more
doaj   +1 more source

A Simplified Theory of External Occulters for Solar Coronagraphs

The Astrophysical Journal
We present a first-principles analytic treatment of modern multivane occulters in circular (coronagraph) and linear (heliospheric imager) geometry, develop a simplified theory that is useful for designing and predicting their performance, explain certain
Craig. E. DeForest, Nicholas F. Erickson, Matthew N. Beasley, Steven N. Osterman, Travis J. Smith, Mary H. Hanson   +5 more
doaj   +1 more source

Compensation Techniques Aimed at Mitigating Vibrations in Optical Ground-Based Telescopes: A Systematic Review. [PDF]

Sensors (Basel), 2021
Palacios-Navarro G, Arranz Martínez F, Martín Ferrer R, Ramos Lorente P.   +3 more
europepmc   +1 more source

Scalable photonic-based nulling interferometry with the dispersed multi-baseline GLINT instrument. [PDF]

Nat Commun, 2021
Martinod MA, Norris B, Tuthill P, Lagadec T, Jovanovic N, Cvetojevic N, Gross S, Arriola A, Gretzinger T, Withford MJ, Guyon O, Lozi J, Vievard S, Deo V, Lawrence JS, Leon-Saval S.   +15 more
europepmc   +1 more source

Maturing electron multiplying charge coupled device photon-counting with variable multiplication gain imaging for a coronagraphic instrument. [PDF]

J Astron Telesc Instrum Syst, 2019
Mallik U, Petrone P, Benford DJ.
europepmc   +1 more source

Subaru Telescope -History, active/adaptive optics, instruments, and scientific achievements. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2021
Iye M.
europepmc   +1 more source

Five Solar Cycles of Solar Corona Investigations. [PDF]

Sol Phys, 2022
Antonucci E.
europepmc   +1 more source

Evidence for a sub-Jovian planet in the young TWA 7 disk. [PDF]

Nature
Lagrange AM, Wilkinson C, Mâlin M, Boccaletti A, Perrot C, Matrà L, Combes F, Beust H, Rouan D, Chomez A, Milli J, Charnay B, Mazevet S, Flasseur O, Olofsson J, Bayo A, Kral Q, Carter A, Crotts KA, Delorme P, Chauvin G, Thebault P, Rubini P, Kiefer F, Radcliffe A, Mazoyer J, Bodrito T, Stasevic S, Langlois M.   +28 more
europepmc   +1 more source

A temperate super-Jupiter imaged with JWST in the mid-infrared. [PDF]

Nature
Matthews EC, Carter AL, Pathak P, Morley CV, Phillips MW, P M SK, Feng F, Bonse MJ, Boogaard LA, Burt JA, Crossfield IJM, Douglas ES, Henning T, Hom J, Ko CL, Kasper M, Lagrange AM, Petit Dit de la Roche D, Philipot F.   +18 more
europepmc   +1 more source