Zobrazeno 1 - 10
of 367
pro vyhledávání: '"Brandt, Timothy D."'
Autor:
Brandt, Timothy D.
This tutorial covers the use of absolute astrometry, in particular from the combination of the Hipparcos and Gaia missions, to identify faint companions to nearby stars and to measure the masses and orbits of those companions. Absolute astrometry has
Externí odkaz:
http://arxiv.org/abs/2406.11593
Autor:
Franson, Kyle, Balmer, William O., Bowler, Brendan P., Pueyo, Laurent, Zhou, Yifan, Rickman, Emily, Zhang, Zhoujian, Mukherjee, Sagnick, Pearce, Tim D., Gagliuffi, Daniella C. Bardalez, Biddle, Lauren I., Brandt, Timothy D., Bowens-Rubin, Rachel, Crepp, Justin R., Davidson, Jr., James W., Faherty, Jacqueline, Ginski, Christian, Horch, Elliott P., Morgan, Marvin, Morley, Caroline V., Perrin, Marshall D., Sanghi, Aniket, Salama, Maissa, Theissen, Christopher A., Tran, Quang H., Wolf, Trevor N.
With a dynamical mass of $3 \, M_\mathrm{Jup}$, the recently discovered giant planet AF Lep b is the lowest-mass imaged planet with a direct mass measurement. Its youth and spectral type near the L/T transition make it a promising target to study the
Externí odkaz:
http://arxiv.org/abs/2406.09528
Measuring fundamental stellar parameters is key to fully comprehending the evolution of stars. However, current theoretical models over-predict effective temperatures, and under-predict radii, compared to observations of K and M dwarfs (radius inflat
Externí odkaz:
http://arxiv.org/abs/2406.00229
Autor:
Lu, Tiger, An, Qier, Li, Gongjie, Millholland, Sarah C., Brandt, G. Mirek, Brandt, Timothy D.
The two planets of the HAT-P-11 system represent fascinating dynamical puzzles due to their significant eccentricities and orbital misalignments. In particular, HAT-P-11 b is on a close-in orbit that tides should have circularized well within the age
Externí odkaz:
http://arxiv.org/abs/2405.19511
Planet-star and planet-planet obliquity encode a planetary system's dynamical history, but both obliquities are hard to measure for misaligned systems with close-in companions. HAT-P-11 is a K4 star with two known planets: a close-in, misaligned supe
Externí odkaz:
http://arxiv.org/abs/2405.19510
Autor:
Brandt, Timothy D.
This paper implements likelihood-based jump detection for detectors read out up-the-ramp, using the entire set of reads to compute likelihoods. The approach compares the $\chi^2$ value of a fit with and without a jump for every possible jump location
Externí odkaz:
http://arxiv.org/abs/2404.01326
Autor:
Tobin, Taylor L., Currie, Thayne, Li, Yiting, Chilcote, Jeffrey, Brandt, Timothy D., Lacy, Brianna, Kuzuhara, Masayuki, Vincent, Maria, Morsy, Mona El, Deo, Vincent, Williams, Jonathan P., Guyon, Olivier, Lozi, Julien, Vievard, Sebastien, Skaf, Nour, Ahn, Kyohoon, Groff, Tyler, Kasdin, N. Jeremy, Uyama, Taichi, Tamura, Motohide, Gibbs, Aidan, Lewis, Briley L., Bowens-Rubin, Rachel, Salama, Maïssa, An, Qier, Chen, Minghan
Publikováno v:
2024, AJ, 167, 205
We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to the young, $\gamma$ Doradus-type variable star, HIP 39017 (HD 65526). The companion's SCExAO/CHARIS JHK ($1.1-2.4\mu$m) spectrum and Keck/
Externí odkaz:
http://arxiv.org/abs/2403.04000
Autor:
Li, Zhexing, Kane, Stephen R., Brandt, Timothy D., Fetherolf, Tara, Robertson, Paul, Zhao, Jinglin, Dalba, Paul A., Wittenmyer, Robert A., Butler, R. Paul, Diaz, Matias R., Howell, Steve B., Bailey, Jeremy, Carter, Brad, Furlan, Elise, Gnilka, Crystal L., Jones, Hugh R. A., O'Toole, Simon, Tinney, Chris
Multi-planet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, as their long observationa
Externí odkaz:
http://arxiv.org/abs/2401.17415
Autor:
Xiao, Guang-Yao, Teng, Huan-Yu, Zhou, Jianzhao, Sato, Bun'ei, Liu, Yu-Juan, Bi, Shaolan, Takarada, Takuya, Kuzuhara, Masayuki, Hon, Marc, Wang, Liang, Omiya, Masashi, Harakawa, Hiroki, Zhao, Fei, Zhao, Gang, Kambe, Eiji, Izumiura, Hideyuki, Ando, Hiroyasu, Noguchi, Kunio, Wang, Wei, Zhai, Meng, Song, Nan, Yang, Chengqun, Li, Tanda, Brandt, Timothy D., Yoshida, Michitoshi, Itoh, Yoichi, Kokubo, Eiichiro
We present the discoveries of two giant planets orbiting the red giant branch (RGB) star HD 112570 and the red clump (RC) star HD 154391, based on the radial velocity (RV) measurements from Xinglong station and Okayama Astrophysical Observatory (OAO)
Externí odkaz:
http://arxiv.org/abs/2312.01388
Autor:
Zhang, Jingwen, Weiss, Lauren M., Huber, Daniel, Jensen, Eric L. N., Brandt, Timothy D., Collins, Karen, Conti, Dennis M., Isaacson, Howard, Lewin, Pablo, Marino, Giuseppe, Massey, Bob, Murgas, Felipe, Palle, Enric, Radford, Don J., Relles, Howard M., Srdoc, Gregor, Stockdale, Chris, Tan, Thiam-Guan, Wang, Gavin
Publikováno v:
AJ, 167, 8 (2024)
The effect of stellar multiplicity on planetary architecture and orbital dynamics provides an important context for exoplanet demographics. We present a volume-limited catalog up to 300 pc of 66 stars hosting planets and planet candidates from Kepler
Externí odkaz:
http://arxiv.org/abs/2310.03299