Zobrazeno 1 - 10
of 209
pro vyhledávání: '"Gaussian processes regression"'
Autor:
Hadrien Paugnat, Tuan Do, Abhimat K. Gautam, Gregory D. Martinez, Andrea M. Ghez, Shoko Sakai, Grant C. Weldon, Matthew W. Hosek Jr., Zoë Haggard, Kelly Kosmo O’Neil, Eric E. Becklin, Gunther Witzel, Jessica R. Lu, Keith Matthews
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 228 (2024)
In this work, we measure the spectral index of Sagittarius A* (Sgr A*) between the H (1.6 μ m) and $K^{\prime} $ (2.2 μ m) broadband filters in the near-infrared (NIR), sampling over a factor ∼40 in brightness, the largest range probed to date by
Externí odkaz:
https://doaj.org/article/f4a053e8546746fbbe66085c7dc7e5ea
Autor:
Somayeh Khakpash, Federica B. Bianco, Maryam Modjaz, Willow F. Fortino, Alexander Gagliano, Conor Larison, Tyler A. Pritchard
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 2, p 37 (2024)
While the spectroscopic classification scheme for stripped-envelope supernovae (SESNe) is clear, and we know that they originate from massive stars that lost some or all of their envelopes of hydrogen and helium, the photometric evolution of classes
Externí odkaz:
https://doaj.org/article/81ad46c7ca8e49259e9ce3f9e413c754
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 208 (2024)
The sound horizon scale is a key theoretical prediction of the cosmological model that depends on the speed of sound in the baryon-photon fluid and the rate of expansion of the early Universe, before matter and radiation decoupled. Baryon acoustic os
Externí odkaz:
https://doaj.org/article/4cbbcf3765694f24a5af8b9650bd0096
Autor:
Collin Lewin, Erin Kara, Aaron J. Barth, Edward M. Cackett, Gisella De Rosa, Yasaman Homayouni, Keith Horne, Gerard A. Kriss, Hermine Landt, Jonathan Gelbord, John Montano, Nahum Arav, Misty C. Bentz, Benjamin D. Boizelle, Elena Dalla Bontà, Michael S. Brotherton, Maryam Dehghanian, Gary J. Ferland, Carina Fian, Michael R. Goad, Juan V. Hernández Santisteban, Dragana Ilić, Jelle Kaastra, Shai Kaspi, Kirk T. Korista, Peter Kosec, Andjelka Kovačević, Missagh Mehdipour, Jake A. Miller, Hagai Netzer, Jack M. M. Neustadt, Christos Panagiotou, Ethan R. Partington, Luka Č. Popović, David Sanmartim, Marianne Vestergaard, Martin J. Ward, Fatima Zaidouni
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 271 (2024)
X-ray reverberation mapping is a powerful technique for probing the innermost accretion disk, whereas continuum reverberation mapping in the UV, optical, and infrared (UVOIR) reveals reprocessing by the rest of the accretion disk and broad-line regio
Externí odkaz:
https://doaj.org/article/3099863b0ddf458286f4821ab7d44ea7
Autor:
Corey Beard, Paul Robertson, Mark R. Giovinazzi, Joseph M. Akana Murphy, Eric B. Ford, Samuel Halverson, Te Han, Rae Holcomb, Jack Lubin, Rafael Luque, Pranav Premnath, Chad F. Bender, Cullen H. Blake, Qian Gong, Howard Isaacson, Shubham Kanodia, Dan Li, Andrea S. J. Lin, Sarah E. Logsdon, Emily Lubar, Michael W. McElwain, Andrew Monson, Joe P. Ninan, Jayadev Rajagopal, Arpita Roy, Christian Schwab, Gudmundur Stefansson, Ryan C. Terrien, Jason T. Wright
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 149 (2024)
We present a new analysis of Kepler-21, the brightest ( V = 8.5) Kepler system with a known transiting exoplanet, Kepler-21 b. Kepler-21 b is a radius valley planet ( R = 1.6 ± 0.2 R _⊕ ) with an Earth-like composition (8.38 ± 1.62 g cm ^–3 ),
Externí odkaz:
https://doaj.org/article/9e8d36f492f74b37afd276b4f75a7811
Autor:
Suman Saha
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 274, Iss 1, p 13 (2024)
Precise physical properties of the known transiting exoplanets are essential for their precise atmospheric characterization using modern and upcoming instruments. Leveraging the large volume of high-signal-to-noise-ratio photometric follow-up data fr
Externí odkaz:
https://doaj.org/article/b5dc2b65639345ad8e042f8871eef009
Autor:
Lionel J. Garcia, Daniel Foreman-Mackey, Catriona A. Murray, Suzanne Aigrain, Dax L. Feliz, Francisco J. Pozuelos
Publikováno v:
The Astronomical Journal, Vol 167, Iss 6, p 284 (2024)
The detection of planetary transits in the light curves of active stars, featuring correlated noise in the form of stellar variability, remains a challenge. Depending on the noise characteristics, we show that the traditional technique that consists
Externí odkaz:
https://doaj.org/article/02265560f13a45d3ac5fb5fc6343d113
Autor:
Bastian Knieling, Karsten Schindler, Amanda A. Sickafoose, Michael J. Person, Stephen E. Levine, Alfred Krabbe
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 4, p 104 (2024)
Gaussian process (GP) regression is a nonparametric Bayesian approach that has been used successfully in various astronomical domains, especially in time-domain astronomy. The most common applications are the smoothing of data for interpolation and t
Externí odkaz:
https://doaj.org/article/aed03369563d452890d7d9e13287bc0f
Publikováno v:
The Astronomical Journal, Vol 167, Iss 4, p 159 (2024)
Gyrochronology, the field of age dating stars using mainly their rotation periods and masses, is ideal for inferring the ages of individual main-sequence stars. However, due to the lack of physical understanding of the complex magnetic fields in star
Externí odkaz:
https://doaj.org/article/88f83e226f0d4896984c11e21574a6da
Autor:
Michael R. B. Matesic, Jason F. Rowe, John H. Livingston, Shishir Dholakia, Daniel Jontof-Hutter, Jack J. Lissauer
Publikováno v:
The Astronomical Journal, Vol 167, Iss 2, p 68 (2024)
There are more than 5000 confirmed and validated planets beyond the solar system to date, more than half of which were discovered by NASA’s Kepler mission. The catalog of Kepler’s exoplanet candidates has only been extensively analyzed under the
Externí odkaz:
https://doaj.org/article/5a306eef44cc4502b1873cda40732c70