Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Geoffrey Bryden"'
Autor:
Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring, Ell Bogat, Charles A. Beichman, Geoffrey Bryden, András Gáspár, Tyler D. Groff, Michael W. McElwain, Michael R. Meyer, Thomas Barclay, Per Calissendorff, Matthew De Furio, Yiting Li, Marcia J. Rieke, Marie Ygouf, Thomas P. Greene, Julien H. Girard, Mario Gennaro, Jens Kammerer, Armin Rest, Thomas L. Roellig, Ben Sunnquist
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 1, p L8 (2024)
Observations of debris disks offer important insights into the formation and evolution of planetary systems. Though M dwarfs make up approximately 80% of nearby stars, very few M dwarf debris disks have been studied in detail—making it unclear how
Externí odkaz:
https://doaj.org/article/32b76b4fc6644912851c21d4123035a1
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 162 (2024)
We report our search for infrared excesses in the Spitzer/Infrared Array Camera survey of the Kepler field at 3.6 and 4.5 μ m. The Spitzer Kepler Survey contains ∼190,000 targets, which we reduce to ∼117,000 targets after applying multiple filte
Externí odkaz:
https://doaj.org/article/3519d3e262a1454b87e0770e8e5f9148
Autor:
Jean-Baptiste Ruffio, Marshall D. Perrin, Kielan K. W. Hoch, Jens Kammerer, Quinn M. Konopacky, Laurent Pueyo, Alex Madurowicz, Emily Rickman, Christopher A. Theissen, Shubh Agrawal, Alexandra Z. Greenbaum, Brittany E. Miles, Travis S. Barman, William O. Balmer, Jorge Llop-Sayson, Julien H. Girard, Isabel Rebollido, Rémi Soummer, Natalie H. Allen, Jay Anderson, Charles A. Beichman, Andrea Bellini, Geoffrey Bryden, Néstor Espinoza, Ana Glidden, Jingcheng Huang, Nikole K. Lewis, Mattia Libralato, Dana R. Louie, Sangmo Tony Sohn, Sara Seager, Roeland P. van der Marel, Hannah R. Wakeford, Laura L. Watkins, Marie Ygouf, C. Matt Mountain
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 73 (2024)
The JWST NIRSpec integral field unit (IFU) presents a unique opportunity to observe directly imaged exoplanets from 3 to 5 μ m at moderate spectral resolution ( R ∼ 2700) and thereby better constrain the composition, disequilibrium chemistry, and
Externí odkaz:
https://doaj.org/article/a6065c46828f4c7781b63d7ec94f9b55
Autor:
Young Min Seo, Karen Willacy, Geoffrey Bryden, Dariusz C. Lis, Paul F. Goldsmith, Klaus M. Pontoppidan, Wing-Fai Thi
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 131 (2024)
We discuss statistical relationships between the mass of protoplanetary disks, the hydrogen deuteride (HD) line flux, and the dust spectral energy distribution (SED) determined using 3000 ProDiMo disk models. The models have 15 free parameters descri
Externí odkaz:
https://doaj.org/article/c34e0e53ee514ad3b7cc2f03e1385c57
Autor:
Marie Ygouf, Charles A. Beichman, Jorge Llop-Sayson, Geoffrey Bryden, Jarron M. Leisenring, András Gáspár, John E. Krist, Marcia J. Rieke, George H. Rieke, Schuyler Grace Wolff, Thomas L. Roellig, Kate Su, Kevin N. Hainline, Klaus W. Hodapp, Thomas P. Greene, Michael R. Meyer, Douglas M. Kelly, Karl Misselt, John Stansberry, Martha Boyer, Doug Johnstone, Scott Horner, Alexandra Z. Greenbaum
Publikováno v:
The Astronomical Journal, Vol 167, Iss 1, p 26 (2023)
We report observations with the JWST/NIRCam coronagraph of the Fomalhaut ( α PsA) system. This nearby A star hosts a complex debris disk system discovered by the IRAS satellite. Observations in F444W and F356W filters using the round 430R mask achie
Externí odkaz:
https://doaj.org/article/e8ea73bc41824785850ff7fd9cb825f8
Autor:
Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring, Ell Bogat, Charles A. Beichman, Geoffrey Bryden, András Gáspár, Tyler D. Groff, Michael W. McElwain, Michael R. Meyer, Thomas Barclay, Per Calissendorff, Matthew De Furio, Marie Ygouf, Anthony Boccaletti, Thomas P. Greene, John Krist, Peter Plavchan, Marcia J. Rieke, Thomas L. Roellig, John Stansberry, John P. Wisniewski, Erick T. Young
Publikováno v:
The Astronomical Journal, Vol 166, Iss 4, p 150 (2023)
High-contrast imaging of debris disk systems permits us to assess the composition and size distribution of circumstellar dust, to probe recent dynamical histories, and to directly detect and characterize embedded exoplanets. Observations of these sys
Externí odkaz:
https://doaj.org/article/d03e13e40ce945f58654cc325204c9ab
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 1, p 14 (2023)
We present the results of N -body simulations meant to reproduce the long-term effects of mutually inclined exoplanets on debris disks, using the HD 202628 system as a proxy. HD 202628 is a Gyr-old solar-type star that possesses a directly observable
Externí odkaz:
https://doaj.org/article/6b4521eec1d148aba447ab8dfc8f1118
Autor:
Matthew De Furio, Ben Lew, Charles Beichman, Thomas Roellig, Geoffrey Bryden, David Ciardi, Michael Meyer, Marcia Rieke, Alexandra Greenbaum, Jarron Leisenring, Jorge Llop-Sayson, Marie Ygouf, Loic Albert, Martha Boyer, Daniel Eisenstein, Klaus Hodapp, Scott Horner, Doug Johnstone, Doug Kelly, Karl Misselt, George Rieke, John Stansberry, Erick Young
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 92 (2023)
The Y-dwarf WISE 1828+2650 is one of the coldest known brown dwarfs with an effective temperature of ∼300 K. Located at a distance of just 10 pc, previous model-based estimates suggest WISE1828+2650 has a mass of ∼5–10 M _J , making it a valuab
Externí odkaz:
https://doaj.org/article/fd92f71bf7c34f699fe756c21d0f190f
Autor:
Alexandra Z. Greenbaum, Jorge Llop-Sayson, Ben W.P. Lew, Geoffrey Bryden, Thomas L. Roellig, Marie Ygouf, B. J. Fulton, Daniel R. Hey, Daniel Huber, Sagnick Mukherjee, Michael Meyer, Jarron Leisenring, Marcia Rieke, Martha Boyer, Joseph J. Green, Doug Kelly, Karl Misselt, Eugene Serabyn, John Stansberry, Laurie E. U. Chu, Matthew De Furio, Doug Johnstone, Joshua E. Schlieder, Charles Beichman
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 126 (2023)
We observed HD 19467 B with JWST’s NIRCam in six filters spanning 2.5–4.6 μ m with the long-wavelength bar coronagraph. The brown dwarf HD 19467 B was initially identified through a long-period trend in the radial velocity of the G3V star HD 194
Externí odkaz:
https://doaj.org/article/85bce911d3be497c86dbc65501076cd5
Autor:
András Gáspár, Schuyler Grace Wolff, George H. Rieke, Jarron M. Leisenring, Jane Morrison, Kate Y. L. Su, Kimberly Ward-Duong, Jonathan Aguilar, Marie Ygouf, Charles Beichman, Jorge Llop-Sayson, Geoffrey Bryden
Publikováno v:
Nature Astronomy.
Planetary debris disks around other stars are analogous to the Asteroid and Kuiper belts in the Solar System. Their structure reveals the configuration of small bodies and provides hints for the presence of planets. The nearby star Fomalhaut hosts on