Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Bohn, Alexander"'
Autor:
Sutlieff, Ben J., Birkby, Jayne L., Stone, Jordan M., Derkink, Annelotte, Backs, Frank, Doelman, David S., Kenworthy, Matthew A., Bohn, Alexander J., Ertel, Steve, Snik, Frans, Woodward, Charles E., Ilyin, Ilya, Skemer, Andrew J., Leisenring, Jarron M., Strassmeier, Klaus G., Wang, Ji, Charbonneau, David, Biller, Beth A.
The time variability and spectra of directly imaged companions provide insight into their physical properties and atmospheric dynamics. We present follow-up R~40 spectrophotometric monitoring of red companion HD 1160 B at 2.8-4.2 $\mu$m using the dou
Externí odkaz:
http://arxiv.org/abs/2405.12271
Autor:
Liu, Pengyu, Bohn, Alexander J., Doelman, David S., Sutlieff, Ben J., Samland, Matthias, Kenworthy, Matthew A., Snik, Frans, Birkby, Jayne L., Biller, Beth A., Males, Jared R., Morzinski, Katie M., Close, Laird M., Otten, Gilles P. P. L.
Publikováno v:
A&A 674, A115 (2023)
The vector Apodizing Phase Plate (vAPP) is a pupil plane coronagraph that suppresses starlight by forming a dark hole in its point spread function (PSF). The unconventional and non-axisymmetrical PSF arising from the phase modification applied by thi
Externí odkaz:
http://arxiv.org/abs/2304.14063
Autor:
Sutlieff, Ben J., Birkby, Jayne L., Stone, Jordan M., Doelman, David S., Kenworthy, Matthew A., Panwar, Vatsal, Bohn, Alexander J., Ertel, Steve, Snik, Frans, Woodward, Charles E., Skemer, Andrew J., Leisenring, Jarron M., Strassmeier, Klaus G., Charbonneau, David
Clouds and other features in exoplanet and brown dwarf atmospheres cause variations in brightness as they rotate in and out of view. Ground-based instruments reach the high contrasts and small inner working angles needed to monitor these faint compan
Externí odkaz:
http://arxiv.org/abs/2301.08689
Autor:
Wölfer, Lisa, Facchini, Stefano, van der Marel, Nienke, van Dishoeck, Ewine F., Benisty, Myriam, Bohn, Alexander J., Francis, Logan, Izquierdo, Andrés F., Teague, Richard D.
Publikováno v:
A&A 670, A154 (2023)
In recent years, high-angular-resolution observations of the dust and gas in circumstellar discs have revealed a variety of morphologies, naturally triggering the question of whether these substructures are driven by forming planets. While it remains
Externí odkaz:
http://arxiv.org/abs/2208.09494
Autor:
Huang, Jane, Ginski, Christian, Benisty, Myriam, Ren, Bin, Bohn, Alexander J., Choquet, Élodie, Öberg, Karin I., Ribas, Álvaro, Bae, Jaehan, Bergin, Edwin A., Birnstiel, Til, Boehler, Yann, Facchini, Stefano, Harsono, Daniel, Hogerheijde, Michiel, Long, Feng, Manara, Carlo F., Ménard, François, Pinilla, Paola, Pinte, Christophe, Rab, Christian, Williams, Jonathan P., Zurlo, Alice
While protoplanetary disks are often treated as isolated systems in planet formation models, observations increasingly suggest that vigorous interactions between Class II disks and their environments are not rare. DO Tau is a T Tauri star that has pr
Externí odkaz:
http://arxiv.org/abs/2204.01758
Autor:
Doelman, David S., Stone, Jordan M., Briesemeister, Zackery W., Skemer, Andrew J. I., Barman, Travis, Brock, Laci S., Hinz, Philip M., Bohn, Alexander, Kenworthy, Matthew, Haffert, Sebastiaan Y., Snik, Frans, Ertel, Steve, Leisenring, Jarron M., Woodward, Charles E., Skrutskie, Michael F.
Understanding the physical processes sculpting the appearance of young gas-giant planets is complicated by degeneracies confounding effective temperature, surface gravity, cloudiness, and chemistry. To enable more detailed studies, spectroscopic obse
Externí odkaz:
http://arxiv.org/abs/2203.08165
Autor:
Bohn, Alexander J., Ginski, Christian, Kenworthy, Matthew A., Mamajek, Eric E., Meshkat, Tiffany, Pecaut, Mark J., Reggiani, Maddalena, Seay, Christopher R., Brown, Anthony G. A., Cugno, Gabriele, Henning, Thomas, Launhardt, Ralf, Quirrenbach, Andreas, Rickman, Emily L., Ségransan, Damien
Abbreviated. We aim to identify new low-mass companions to young stars using the astrometric measurements provided by the Gaia space mission and complementary VLT/SPHERE data. We identify companion candidates from a sample of K-type, pre-main sequenc
Externí odkaz:
http://arxiv.org/abs/2109.09185
Autor:
Zhang, Yapeng, Snellen, Ignas, Bohn, Alexander J., Mollière, Paul, Ginski, Christian, Hoeijmakers, H. Jens, Kenworthy, Matthew A., Mamajek, Eric E., Meshkat, Tiffany, Reggiani, Maddalena, Snik, Frans
Isotope abundance ratios play an important role in astronomy and planetary sciences, providing insights in the origin and evolution of the Solar System, interstellar chemistry, and stellar nucleosynthesis. In contrast to deuterium/hydrogen ratios, ca
Externí odkaz:
http://arxiv.org/abs/2107.06297
Autor:
Sutlieff, Ben J., Bohn, Alexander J., Birkby, Jayne L., Kenworthy, Matthew A., Morzinski, Katie M., Doelman, David S., Males, Jared R., Snik, Frans, Close, Laird M., Hinz, Philip M., Charbonneau, David
The vector Apodizing Phase Plate (vAPP) is a class of pupil plane coronagraph that enables high-contrast imaging by modifying the Point Spread Function (PSF) to create a dark hole of deep flux suppression adjacent to the PSF core. Here, we recover th
Externí odkaz:
http://arxiv.org/abs/2106.14890