Zobrazeno 1 - 10
of 324
pro vyhledávání: '"Pope, Benjamin"'
Increasingly precise space-based photometry uncovers higher-order effects in transits, eclipses and phase curves which can be used to characterize exoplanets in novel ways. The subtle signature induced by a rotationally deformed exoplanet is determin
Externí odkaz:
http://arxiv.org/abs/2410.03449
Publikováno v:
Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 9, Issue 2, 028007 (June 2023)
The sensitivity limits of space telescopes are imposed by uncalibrated errors in the point spread function, photon-noise, background light, and detector sensitivity. These are typically calibrated with specialized wavefront sensor hardware and with f
Externí odkaz:
http://arxiv.org/abs/2406.08703
The design of astronomical hardware operating at the diffraction limit requires optimization of physical optical simulations of the instrument with respect to desired figures of merit, such as throughput or astrometric accuracy. These systems can be
Externí odkaz:
http://arxiv.org/abs/2406.08704
Autor:
Blakely, Dori, Johnstone, Doug, Cugno, Gabriele, Sivaramakrishnan, Anand, Tuthill, Peter, Dong, Ruobing, Pope, Benjamin J. S., Albert, Loïc, Charles, Max, Cooper, Rachel A., De Furio, Matthew, Desdoigts, Louis, Doyon, René, Francis, Logan, Greenbaum, Alexandra Z., Lafrenière, David, Lloyd, James P., Meyer, Michael R., Pueyo, Laurent, Ray, Shrishmoy, Sánchez-Bermúdez, Joel, Soulain, Anthony, Thatte, Deepashri, Vandal, Thomas
We observed the planet-hosting system PDS 70 with the James Webb Interferometer, JWST's Aperture Masking Interferometric (AMI) mode within NIRISS. Observing with the F480M filter centered at 4.8 $\mu$m, we simultaneously fit a geometric model to the
Externí odkaz:
http://arxiv.org/abs/2404.13032
Autor:
Driessen, Laura N., Pritchard, Joshua, Murphy, Tara, Heald, George, Robrade, Jan, Das, Barnali, Duchesne, Stefan, Kaplan, David L., Lenc, Emil, Lynch, Christene R., Pope, Benjamin J. S., Rose, Kovi, Stelzer, Beate, Wang, Yuanming, Zic, Andrew
We present the Sydney Radio Star Catalogue, a new catalogue of stars detected at megahertz to gigahertz radio frequencies. It consists of 839 unique stars with 3,405 radio detections, more than doubling the previously known number of radio stars. We
Externí odkaz:
http://arxiv.org/abs/2404.07418
Autor:
Xin, Yinzi, Pueyo, Laurent, Laugier, Romain, Pogorelyuk, Leonid, Douglas, Ewan S., Pope, Benjamin J. S., Cahoy, Kerri L.
Directly observing exoplanets with coronagraphs is impeded by the presence of speckles from aberrations in the optical path, which can be mitigated in hardware with wavefront control as well as in post-processing. This work explores using an instrume
Externí odkaz:
http://arxiv.org/abs/2401.04269
Autor:
Bloot, Sanne, Callingham, Joseph R., Vedantham, Harish K., Kavanagh, Robert D., Pope, Benjamin J. S., Climent, Juan B., Guirado, José Carlos, Peña-Moñino, Luis, Pérez-Torres, Miguel
Stellar radio emission can measure a star's magnetic field strength and structure, plasma density and dynamics, and the stellar wind pressure impinging on exoplanet atmospheres. However, properly interpreting the radio data often requires temporal ba
Externí odkaz:
http://arxiv.org/abs/2312.09071
Autor:
Fitzmaurice, Evan, Stefánsson, Gudmundur, Kavanagh, Robert D., Mahadevan, Suvrath, Cañas, Caleb I., Winn, Joshua N., Robertson, Paul, Ninan, Joe P., Albrecht, Simon, Callingham, J. R., Cochran, William D., Delamer, Megan, Kanodia, Shubham, Lin, Andrea S. J., Marcussen, Marcus L., Pope, Benjamin J. S., Ramsey, Lawrence W., Roy, Arpita, Vedantham, Harish, Wright, Jason T.
We characterize the LHS 1610 system, a nearby ($d=9.7$ pc) M5 dwarf hosting a brown dwarf in a $10.6$ day, eccentric ($e \sim 0.37$) orbit. A joint fit of the available Gaia two-body solution, discovery radial velocities (RVs) from TRES, and new RVs
Externí odkaz:
http://arxiv.org/abs/2310.07827
Autor:
Calissendorff, Per, De Furio, Matthew, Meyer, Michael, Albert, Loïc, Aganze, Christian, Ali-Dib, Mohamad, Gagliuffi, Daniella C. Bardalez, Baron, Frederique, Beichman, Charles A., Burgasser, Adam J., Cushing, Michael C., Faherty, Jacqueline Kelly, Fontanive, Clémence, Gelino, Christopher R., Gizis, John E., Greenbaum, Alexandra Z., Kirkpatrick, J. Davy, Leggett, Sandy K., Martinache, Frantz, Mary, David, N'Diaye, Mamadou, Pope, Benjamin J. S., Roellig, Thomas L, Sahlmann, Johannes, Sivaramakrishnan, Anand, Thorngren, Daniel Peter, Ygouf, Marie, Vandal, Thomas
We report the discovery of the first brown dwarf binary system with a Y dwarf primary, WISE J033605.05$-$014350.4, observed with NIRCam on JWST with the F150W and F480M filters. We employed an empirical point spread function binary model to identify
Externí odkaz:
http://arxiv.org/abs/2303.16923