Zobrazeno 1 - 10
of 2 820
pro vyhledávání: '"Howard, Andrew"'
The discontinuous operations inherent in quantization and sparsification introduce obstacles to backpropagation. This is particularly challenging when training deep neural networks in ultra-low precision and sparse regimes. We propose a novel, robust
Externí odkaz:
http://arxiv.org/abs/2409.09245
Autor:
Lubin, Jack, Petigura, Erik A., Van Zandt, Judah, Beard, Corey, Dai, Fei, Halverson, Samuel, Holcomb, Rae, Howard, Andrew W., Isaacson, Howard, Luhn, Jacob, Robertson, Paul, Rubenzahl, Ryan A., Stefansson, Gudmundur, Winn, Joshua N., Brodheim, Max, Deich, William, Hill, Grant M., Gibson, Steven R., Holden, Bradford, Householder, Aaron, Laher, Russ R., Lanclos, Kyle, Payne, Joel, Roy, Arpita, Smith, Roger, Shaum, Abby P., Schwab, Christian, Walawender, Josh
We report the sky-projected spin-orbit angle $\lambda$ for HD 191939 b, the innermost planet in a 6 planet system, using Keck/KPF to detect the Rossiter-McLaughlin (RM) effect. Planet b is a sub-Neptune with radius 3.4 $\pm$ 0.8 R$_{\oplus}$ and mass
Externí odkaz:
http://arxiv.org/abs/2409.06795
Autor:
Knudstrup, Emil, Albrecht, Simon H., Winn, Joshua N., Gandolfi, Davide, Zanazzi, John J., Persson, Carina M., Fridlund, Malcolm, Marcussen, Marcus L., Chontos, Ashley, Keniger, Marcelo A. F., Eisner, Nora L., Bieryla, Allyson, Isaacson, Howard, Howard, Andrew W., Hirsch, Lea A., Murgas, Felipe, Narita, Norio, Palle, Enric, Kawai, Yugo, Baker, David
Measurements of the obliquities in exoplanet systems have revealed some remarkable architectures, some of which are very different from the Solar System. Nearly 200 obliquity measurements have been obtained through observations of the Rossiter-McLaug
Externí odkaz:
http://arxiv.org/abs/2408.09793
Autor:
Howard, Andrew J., Britton, M., Streeter, Zachary L., Cheng, Chuan, Lucchese, Robert R., McCurdy, C. William, Bucksbaum, Philip H.
Semi-heavy water (HOD) is one of the simplest molecules in which the bonds are labelled by isotope. We demonstrate that a pair of intense few-femtosecond infrared laser pulses can be used to selectively tunnel ionize along one of the two bonds. The f
Externí odkaz:
http://arxiv.org/abs/2408.09056
Autor:
Teng, Huan-Yu, Dai, Fei, Howard, Andrew W., Isaacson, Howard, Rubenzahl, Ryan A., Angelo, Isabel, Polanski, Alex S.
We report the observation of the transiting planet TOI-942c, a Neptunian planet orbiting a young K-type star approximately 50 Myr years old. Using Keck/HIRES, we observed a partial transit of the planet and detected an associated radial velocity anom
Externí odkaz:
http://arxiv.org/abs/2408.07788
Autor:
Zhang, Jingwen, Huber, Daniel, Weiss, Lauren M., Xuan, Jerry W., Burt, Jennifer A., Dai, Fei, Saunders, Nicholas, Petigura, Erik A., Rubenzahl, Ryan A., Winn, Joshua N., Wang, Sharon X., Van Zandt, Judah, Brodheim, Max, Claytor, Zachary R., Crossfield, Ian, Deich, William, Fulton, Benjamin J., Gibson, Steven R., Hill, Grant M., Holden, Bradford, Householder, Aaron, Howard, Andrew W., Isaacson, Howard, Kaye, Stephen, Lanclos, Kyle, Laher, Russ R., Lubin, Jack, Payne, Joel, Roy, Arpita, Schwab, Christian, Shaum, Abby P., Walawender, Josh, Wishnow, Edward, Yeh, Sherry
Characterizing outer companions to hot Jupiters plays a crucial role in deciphering their origins. We present the discovery of a long-period giant planet, HD 118203 c ($m_{c}=11.79^{+0.69}_{-0.63}\ \mathrm{M_{J}}$, $a_{c}=6.28^{+0.10}_{-0.11}$ AU) ex
Externí odkaz:
http://arxiv.org/abs/2407.21377
Autor:
Saunders, Nicholas, Grunblatt, Samuel K., Chontos, Ashley, Dai, Fei, Huber, Daniel, Zhang, Jingwen, Stefansson, Gudmundur, van Saders, Jennifer L., Winn, Joshua N., Hey, Daniel, Howard, Andrew W., Fulton, Benjamin, Isaacson, Howard, Beard, Corey, Giacalone, Steven, van Zandt, Judah, Murphey, Joseph M. Akana, Rice, Malena, Blunt, Sarah, Turtelboom, Emma, Dalba, Paul A., Lubin, Jack, Brinkman, Casey, Louden, Emma M., Page, Emma, Watkins, Cristilyn N., Collins, Karen A., Stockdale, Chris, Tan, Thiam-Guan, Schwarz, Richard P., Massey, Bob, Howell, Steve B., Vanderburg, Andrew, Ricker, George R., Jenkins, Jon M., Seager, Sara, Christiansen, Jessie L., Daylan, Tansu, Falk, Ben, Brodheim, Max, Gibson, Steven R., Hill, Grant M., Holden, Bradford, Householder, Aaron, Kaye, Stephen, Laher, Russ R., Lanclos, Kyle, Petigura, Erik A., Roy, Arpita, Rubenzahl, Ryan A., Schwab, Christian, Shaum, Abby P., Sirk, Martin M., Smith, Christopher L., Walawender, Josh, Yeh, Sherry
Publikováno v:
AJ, 168, 2 (2024)
The degree of alignment between a star's spin axis and the orbital plane of its planets (the stellar obliquity) is related to interesting and poorly understood processes that occur during planet formation and evolution. Hot Jupiters orbiting hot star
Externí odkaz:
http://arxiv.org/abs/2407.21650
Autor:
Giacalone, Steven, Dai, Fei, Zanazzi, J. J., Howard, Andrew W., Dressing, Courtney D., Winn, Joshua N., Rubenzahl, Ryan A., Carmichael, Theron W., Vowell, Noah, Kesseli, Aurora, Halverson, Samuel, Isaacson, Howard, Brodheim, Max, Deich, William, Fulton, Benjamin J., Gibson, Steven R., Hill, Grant M., Holden, Bradford, Householder, Aaron, Kaye, Stephen, Laher, Russ R., Lanclos, Kyle, Payne, Joel, Petigura, Erik A., Roy, Arpita, Schwab, Christian, Shaum, Abby P., Sirk, Martin M., Smith, Chris, Stefánsson, Guðmundur, Walawender, Josh, Wang, Sharon X., Weiss, Lauren M., Yeh, Sherry
We introduce the OATMEAL survey, an effort to measure the obliquities of stars with transiting brown dwarf companions. We observed a transit of the close-in ($P_{\rm orb} = 1.74 \,$ days) brown dwarf GPX-1 b using the Keck Planet Finder (KPF) spectro
Externí odkaz:
http://arxiv.org/abs/2407.21235
Autor:
Hon, Marc, Huber, Daniel, Li, Yaguang, Metcalfe, Travis S., Bedding, Timothy R., Ong, Joel, Chontos, Ashley, Rubenzahl, Ryan, Halverson, Samuel, García, Rafael A., Kjeldsen, Hans, Stello, Dennis, Hey, Daniel R., Campante, Tiago, Howard, Andrew W., Gibson, Steven R., Rider, Kodi, Roy, Arpita, Baker, Ashley D., Edelstein, Jerry, Smith, Chris, Fulton, Benjamin J., Walawender, Josh, Brodheim, Max, Brown, Matt, Chan, Dwight, Dai, Fei, Deich, William, Gottschalk, Colby, Grillo, Jason, Hale, Dave, Hill, Grant M., Holden, Bradford, Householder, Aaron, Isaacson, Howard, Ishikawa, Yuzo, Jelinsky, Sharon R., Kassis, Marc, Kaye, Stephen, Laher, Russ, Lanclos, Kyle, Lee, Chien-Hsiu, Lilley, Scott, McCarney, Ben, Miller, Timothy N., Payne, Joel, Petigura, Erik A., Poppett, Claire, Raffanti, Michael, Rockosi, Constance, Sanford, Dale, Schwab, Christian, Shaum, Abby P., Sirk, Martin M., Smith, Roger, Thorne, Jim, Valliant, John, Vandenberg, Adam, Wang, Shin Ywan, Wishnow, Edward, Wold, Truman, Yeh, Sherry, Baker, Ashley, Basu, Sarbani, Bedell, Megan, Cegla, Heather M., Crossfield, Ian, Dressing, Courtney, Dumusque, Xavier, Knutson, Heather, Mawet, Dimitri, O'Meara, John, Stefánsson, Guðmundur, Teske, Johanna, Vasisht, Gautam, Wang, Sharon Xuesong, Weiss, Lauren M., Winn, Joshua N., Wright, Jason T.
Asteroseismology of dwarf stars cooler than the Sun is very challenging due to the low amplitudes and rapid timescales of oscillations. Here, we present the asteroseismic detection of solar-like oscillations at 4-minute timescales ($\nu_{\mathrm{max}
Externí odkaz:
http://arxiv.org/abs/2407.21234
Autor:
Rubenzahl, Ryan A., Dai, Fei, Halverson, Samuel, Howard, Andrew W., Householder, Aaron, Fulton, Benjamin, Behmard, Aida, Gibson, Steven R., Roy, Arpita, Shaum, Abby P., Isaacson, Howard, Brodheim, Max, Deich, William, Hill, Grant M., Holden, Bradford, Laher, Russ R., Lanclos, Kyle, Payne, Joel N., Petigura, Erik A., Schwab, Christian, Smith, Chris, Stefánsson, Guðmundur, Walawender, Josh, Wang, Sharon X., Weiss, Lauren M., Winn, Joshua N., Wishnow, Edward
We present the first spectroscopic transit results from the newly commissioned Keck Planet Finder on the Keck-I telescope at W. M. Keck Observatory. We observed a transit of KELT-18 b, an inflated ultra-hot Jupiter orbiting a hot star ($T_\text{eff}
Externí odkaz:
http://arxiv.org/abs/2407.21196