Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Theodora Karalidi"'
Autor:
Natalia Oliveros-Gomez, Elena Manjavacas, Daniella C. Bardalez Gagliuffi, Theodora Karalidi, Johanna M. Vos, Jacqueline K. Faherty
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 149 (2024)
Most brown dwarfs show some level of photometric or spectral variability. However, finding the most variable dwarfs more suited for a thorough variability monitoring campaign remained a challenge until a few years ago with the design of spectral indi
Externí odkaz:
https://doaj.org/article/b2b776e43acb444fa3718828be74e512
Autor:
Nguyen Fuda, Dániel Apai, Domenico Nardiello, Xianyu Tan, Theodora Karalidi, Luigi Rolly Bedin
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 182 (2024)
In this work, we present the longest photometric monitoring of up to 1200 hr of the strongly variable brown dwarf binaries Luhman 16 AB and provide evidence of ±5% variability on a timescale of several to hundreds of hours for this object. We show t
Externí odkaz:
https://doaj.org/article/fdfdc3feb7994b9496b358fec62cf552
Autor:
Sagnick Mukherjee, Jonathan J. Fortney, Caroline V. Morley, Natasha E. Batalha, Mark S. Marley, Theodora Karalidi, Channon Visscher, Roxana Lupu, Richard Freedman, Ehsan Gharib-Nezhad
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 1, p 73 (2024)
Disequilibrium chemistry due to vertical mixing in the atmospheres of many brown dwarfs and giant exoplanets is well established. Atmosphere models for these objects typically parameterize mixing with the highly uncertain K _zz diffusion parameter. T
Externí odkaz:
https://doaj.org/article/2145fee431c0412684586048703339e0
Autor:
Alexander Madurowicz, Sagnick Mukherjee, Natasha Batalha, Bruce Macintosh, Mark Marley, Theodora Karalidi
Publikováno v:
The Astronomical Journal, Vol 165, Iss 6, p 238 (2023)
We reanalyze the near-infrared spectra of the young extrasolar giant planet 51 Eridani b, which was originally presented in Macintosh et al. and Rajan et al. using modern atmospheric models, including a self-consistent treatment of disequilibrium che
Externí odkaz:
https://doaj.org/article/c035310b0ab34d3993129553ddaf7698
Autor:
Kenneth E. Gordon, Theodora Karalidi, Kimberly M. Bott, Paulo A. Miles-Páez, Willeke Mulder, Daphne M. Stam
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 166 (2023)
In the JWST, Extremely Large Telescopes, and LUVOIR era, we expect to characterize a number of potentially habitable Earth-like exoplanets. However, the characterization of these worlds depends crucially on the accuracy of theoretical models. Validat
Externí odkaz:
https://doaj.org/article/ae48404be33f40818c9a1c35699ebd45
Autor:
Elena Manjavacas, Paulo A. Miles-Páez, Theodora Karalidi, Johanna M. Vos, Max L. Galloway, Julien H. Girard
Publikováno v:
The Astronomical Journal, Vol 165, Iss 4, p 181 (2023)
Recent atmospheric models for brown dwarfs suggest that the existence of clouds in substellar objects is not needed to reproduce their spectra, nor their rotationally induced photometric variability, believed to be due to the heterogeneous cloud cove
Externí odkaz:
https://doaj.org/article/d30a0f0a6b4b403a9a34949a0af5d898
Autor:
Sagnick Mukherjee, Jonathan J. Fortney, Natasha E. Batalha, Theodora Karalidi, Mark S. Marley, Channon Visscher, Brittany E. Miles, Andrew J. I. Skemer
Evidence of disequilibrium chemistry due to vertical mixing in the atmospheres of many T and Y-dwarfs has been inferred due to enhanced mixing ratios of CO and reduced NH$_3$. Atmospheric models of planets and brown dwarfs typically parameterize this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e27fd41d4a3de4d48c2f4a0935b39b0a
Autor:
Theodora Karalidi, Mark Marley, Jonathan J. Fortney, Caroline Morley, Didier Saumon, Roxana Lupu, Channon Visscher, Richard Freedman
Exoplanet and brown dwarf atmospheres commonly show signs of disequilibrium chemistry. In the James Webb Space Telescope era high resolution spectra of directly imaged exoplanets will allow the characterization of their atmospheres in more detail, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd14ab3a69c6b825040a549f7935f269
http://arxiv.org/abs/2110.11824
http://arxiv.org/abs/2110.11824
Autor:
Patricio E. Cubillos, Dylan Keating, Nicolas Cowan, Johanna Vos, Ben Burningham, Marie Ygouf, Theodora Karalidi, Yifan Zhou, Eileen Gonzales
Thermal phase variations of exoplanets are a patent testimony of their multidimensional nature: day-to-night temperature contrasts range from hundreds to thousands of degrees. Nonetheless, the spectra of these planets have typically been fit using 1D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff9e630f716b1d3491d291d15bce7c9d
https://doi.org/10.5194/epsc2021-671
https://doi.org/10.5194/epsc2021-671
Autor:
Elena Manjavacas, Theodora Karalidi, Xianyu Tan, Johanna M. Vos, Ben W. P. Lew, Beth A. Biller, Natalia Oliveros-Gómez
Publikováno v:
The Astronomical Journal. 164:65
Only a handful of late T brown dwarfs have been monitored for spectrophotometric variability, leaving incomplete the study of the atmospheric cloud structures of the coldest brown dwarfs, which share temperatures with some cold, directly imaged exopl