Results 141 to 150 of about 2,016,206 (398)

A Gravitational-wave-detectable Candidate Type Ia Supernova Progenitor

The Astrophysical Journal
Type Ia supernovae (SNe Ia), critical for studying cosmic expansion, arise from thermonuclear explosions of white dwarfs, but their precise progenitor pathways remain unclear.
Emma T. Chickles, Kevin B. Burdge, Joheen Chakraborty, Vik S. Dhillon, Paul Draghis, James Munday, Saul A. Rappaport, John Tonry, Evan B. Bauer, Alex J. Brown, Noel Castro, Deepto Chakrabarty, Martin Dyer, Kareem El-Badry, Anna Frebel, Gabor Furesz, James Garbutt, Matthew J. Green, Aaron Householder, Scott A. Hughes, Daniel Jarvis, Erin Kara, Mark R. Kennedy, Paul Kerry, Stuart P Littlefair, James McCormac, Geoffrey Mo, Mason Ng, Steven Parsons, Ingrid Pelisoli, Eleanor Pike, Thomas A. Prince, George R. Ricker, Jan van Roestel, David Sahman, Ken J. Shen, Robert A. Simcoe, Pier-Emmanuel Tremblay, Andrew Vanderburg, Tin Long Sunny Wong   +39 more
doaj   +1 more source

Orbital Decay in an Accreting and Eclipsing 13.7 Minute Orbital Period Binary with a Luminous Donor

The Astrophysical Journal Letters, 2023
We report the discovery of ZTF J0127+5258, a compact mass-transferring binary with an orbital period of 13.7 minutes. The system contains a white dwarf accretor, which likely originated as a post–common envelope carbon–oxygen (CO) white dwarf, and a warm
Kevin B. Burdge, Kareem El-Badry, Saul Rappaport, Tin Long Sunny Wong, Evan B. Bauer, Lars Bildsten, Ilaria Caiazzo, Deepto Chakrabarty, Emma Chickles, Matthew J. Graham, Erin Kara, S. R. Kulkarni, Thomas R. Marsh, Melania Nynka, Thomas A. Prince, Robert A. Simcoe, Jan van Roestel, Zach Vanderbosch, Eric C. Bellm, Richard G. Dekany, Andrew J. Drake, George Helou, Frank J. Masci, Jennifer Milburn, Reed Riddle, Ben Rusholme, Roger Smith   +26 more
doaj   +1 more source

Accreting Double White Dwarf Binaries: Implications for LISA [PDF]

, 2017
We explore the long-term evolution of mass-transferring white dwarf (WD) binaries undergoing both direct-impact and disk accretion and explore implications of such systems to gravitational-wave (GW) astronomy.
K. Kremer, K. Breivik, S. Larson, V. Kalogera   +3 more
semanticscholar   +1 more source

Phosphate Removal by ZIF‐8 and Magnetic Fe3O4/ZIF‐8: A Comparative Study of Capacity, Kinetics, and Regeneration

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study presents a comparative evaluation of phosphate adsorption on pristine ZIF‐8 and Fe3O4‐doped ZIF‐8 (Fe3O4/ZIF‐8), a hybrid adsorbent combining high surface area with magnetic separability. Structural integrity and composition were confirmed using SEM, XRD, FTIR, and XPS.
Edward Hartman Ernest, Maria Stefani, Immanuel Joseph Ondang, Artik Elisa Angkawijaya, Shella Permatasari Santoso, Hsien‐Yi Hsu, Felycia Edi Soetaredjo, Kuan‐Chen Cheng, Shin‐Ping Lin, Chang‐Wei Hsieh, Suryadi Ismadji   +10 more
wiley   +1 more source

WD0837+185:the formation and evolution of an extreme mass ratio white dwarf-brown dwarf binary in Praesepe

, 2012
There is a striking and unexplained dearth of brown dwarf companions in close orbits (< 3AU) around stars more massive than the Sun, in stark contrast to the frequency of stellar and planetary companions.
Alexander, R. D., Burleigh, M. R., Casewell, S. L., Dobbie, P. D., Hodgkin, S. T., Jameson, R. F., Lawrie, K. A., Napiwotzki, R., Wynn, G. A.   +8 more
core   +1 more source

The white dwarf population within 40 pc of the Sun [PDF]

, 2016
The white dwarf luminosity function is an important tool to understand the properties of the Solar neighborhood, like its star formation history, and its age.
García-Berro, E., Torres, S.
core   +3 more sources

A 5.3-min-period pulsing white dwarf in a binary detected from radio to X-rays

Nature Astronomy, 2023
I. Pelisoli, T. Marsh, D. Buckley, I. Heywood, S. Potter, A. Schwope, J. Brink, A. Standke, P. Woudt, S. Parsons, M. Green, S. O. Kepler, J. Munday, A. Romero, E. Breedt, A. Brown, V. Dhillon, M. Dyer, P. Kerry, S. Littlefair, D. Sahman, J. F. Wild   +21 more
semanticscholar   +1 more source

Characterizing Accreting Double White Dwarf Binaries with the Laser Interferometer Space Antenna and Gaia [PDF]

, 2017
We demonstrate a method to fully characterize mass-transferring double white dwarf (DWD) systems with a helium-rich (He) white dwarf (WD) donor based on the mass–radius (M–R) relationship for He WDs. Using a simulated Galactic population of DWDs, we show
K. Breivik, K. Kremer, Michael Bueno, S. Larson, S. Coughlin, V. Kalogera   +5 more
semanticscholar   +1 more source

Description of the skull, braincase, and dentition of Moschognathus whaitsi (Dinocephalia, Tapinocephalia), and its palaeobiological and behavioral implications

The Anatomical Record, EarlyView.
Abstract A subadult Moschognathus whaitsi from the Eastern Cape Province, South Africa, was scanned using synchrotron radiation X‐ray computed tomography (SRXCT). Its subadult state allowed the cranial bones and teeth to be identified and individually reconstructed in 3D.
Tristen Lafferty, Luke A. Norton, Aliénor Duhamel, Julien Benoit   +3 more
wiley   +1 more source

Low Frequency Gravitational Waves from White Dwarf MACHO Binaries [PDF]

, 2000
The possibility that Galactic halo MACHOs are white dwarfs has recently attracted much attention. Using the known properties of white dwarf binaries in the Galactic disk as a model, we estimate the possible contribution of halo white dwarf binaries to ...
Ben Kulick, Giampieri G., Joshua R. Routzahn, Shane L. Larson, William A. Hiscock   +4 more
core   +2 more sources