Results 51 to 60 of about 117,776 (291)

Uncertainties in Historic Visual Double Star Measures—III Accurate Calibration Pairs

Astronomische Nachrichten, EarlyView.
ABSTRACT Based on space‐based positions and proper motions, we present accurate rectilinear elements for 857 double star pairs over the celestial sphere. These elements allow for the computation of precision ephemeris Position Angles and Separations of these pairs.
Roderick R. Letchford, Graeme L. White
wiley   +1 more source

Origin of an orbiting star around the galactic supermassive black hole

Proceedings of the Japan Academy. Series B, Physical and Biological Sciences, 2023
The tremendous tidal force that is linked to the supermassive black hole (SMBH) at the center of our galaxy is expected to strongly subdue star formation in its vicinity.
Shogo NISHIYAMA, Tomohiro KARA, Brian THORSBRO, Hiromi SAIDA, Yohsuke TAKAMORI, Masaaki TAKAHASHI, Takayuki OHGAMI, Kohei ICHIKAWA, Rainer SCHODEL   +8 more
doaj   +1 more source

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, EarlyView.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

Multimessenger Studies with the Pierre Auger Observatory

Particles
The Pierre Auger Observatory, the world’s largest ultra-high-energy (UHE) cosmic ray (CR) detector, plays a crucial role in multi-messenger astroparticle physics with its high sensitivity to UHE photons and neutrinos.
Jon Paul Lundquist, the Pierre Auger Collaboration   +1 more
doaj   +1 more source

Gamma Ray Source Localization for Time Projection Chamber Telescopes Using Convolutional Neural Networks

AI, 2022
Diverse phenomena such as positron annihilation in the Milky Way, merging binary neutron stars, and dark matter can be better understood by studying their gamma ray emission.
Brandon Khek, Aashwin Mishra, Micah Buuck, Tom Shutt   +3 more
doaj   +1 more source

Enabling real-time multi-messenger astrophysics discoveries with deep learning [PDF]

Nature Reviews Physics, 2019
Multi-messenger astrophysics is a fast-growing, interdisciplinary field that combines data, which vary in volume and speed of data processing, from many different instruments that probe the Universe using different cosmic messengers: electromagnetic ...
E. Huerta, Gabrielle Allen, I. Andreoni, J. Antelis, É. Bachelet, G. Berriman, F. Bianco, R. Biswas, M. Kind, K. Chard, Minsik Cho, P. Cowperthwaite, Z. Etienne, M. Fishbach, F. Förster, D. George, Tom Gibbs, M. Graham, W. Gropp, R. Gruendl, Anushri Gupta, R. Haas, Sarah Habib, E. Jennings, Margaret W. G. Johnson, E. Katsavounidis, D. Katz, Asad Khan, V. Kindratenko, William T. C. Kramer, Xin Liu, A. Mahabal, Z. Márka, Kenton McHenry, J. Miller, Claudia Moreno, M. Neubauer, S. Oberlin, A. Olivas, D. Petravick, A. Rebei, S. Rosofsky, M. Ruiz, Aaron Saxton, B. Schutz, A. Schwing, E. Seidel, S. Shapiro, Hongyu Shen, Yue Shen, L. Singer, B. Sipocz, Lunan Sun, John Towns, A. Tsokaros, Wei Wei, J. Wells, T. Williams, Jinjun Xiong, Zhizhen Zhao   +59 more
semanticscholar   +1 more source

Teacher‐makers and teacher‐breakers: (Re)defining how status and safety influence trajectories into and away from teaching

British Educational Research Journal, EarlyView.
Abstract This paper uses empirical data from a longitudinal qualitative study conducted with aspirant teachers in England to propose (re)definitions of the concepts of ‘status’ and ‘safety’ as a framework with which to understand and improve teacher recruitment.
Emily MacLeod
wiley   +1 more source

From Molecule to Meaning: Click and Bioorthogonal Chemical Reporters for Plant Systems, Biological Imaging, and Artistic Expression

ChemBioChem, EarlyView.
At the intersection of chemical biology, plant imaging, and contemporary art, this review introduces the concept of chembioart. By tracing how chemical reporters illuminate plant biomolecules in vivo, their role not only in advancing scientific understanding but also in inspiring transdisciplinary collaborations and visual expression is highlighted ...
Marie Hinnebo, Clémence Simon, Adèle Tilouine, Corentin Spriet, Christophe Biot   +4 more
wiley   +1 more source

Spitzer Resurrector Mission: Advantages for Space Weather Research and Operations

Aerospace
In 1979, NASA established the Great Observatory program, which included four telescopes (Hubble, Compton, Chandra, and Spitzer) to explore the Universe.
Shawn M. Usman, Giovanni G. Fazio, Christopher A. Grasso, Ryan C. Hickox, Cameo Lance, William B. Rideout, Daveanand M. Singh, Howard A. Smith, Angelos Vourlidas, Joseph L. Hora, Gary J. Melnick, Matthew Ashby, Volker Tolls, Steven Willner, Salma Benitez   +14 more
doaj   +1 more source

Charge State Influence on Stability and Isomerism in Dehydrogenated PAHs: Insights from Anthracene, Acridine, and Phenazine

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
The ionization of anthracene, acridine, and phenazine has been explored, along with the removal of one and two hydrogen atoms, to provide valuable information for astrochemists and to understand the behavior of the resulting structures and their electronic reorganization. Abstract In this study, we systematically explored the stability and isomerism of
Khaldia Zghida, Farouk Hamza Reguig, Manuel Alcamí, Al Mokhtar Lamsabhi   +3 more
wiley   +1 more source