Results 101 to 110 of about 2,016,206 (398)

White Dwarf/M Dwarf Binaries as Single Degenerate Progenitors of Type Ia Supernovae

, 2012
Limits on the companions of white dwarfs in the single degenerate scenario for the origin of Type Ia supernovae (SNIa) have gotten increasingly tight. The only type of non-degenerate stars that survive the limits on the companions of SNIa in SNR 0509-67 ...
Andronov, Badenes, Badenes, Birkby, Blondin, Bloom, Bochanski, Bochanski, Browning, Campbell, Chatzopoulos, Chomiuk, Dan, Delfosse, Di Stefano, Di Stefano, Falcon, Fryer, Gerardy, Gerardy, González Hernández, González Hernández, Hachisu, Hachisu, Hilton, Höflich, Höflich, Ivanova, J. Craig Wheeler, Kasen, Kerzendorf, Kerzendorf, King, King, Knigge, Law, Leonard, Li, Li, Liebert, Liebert, MacDonald, Maoz, Marietta, Mullan, Napiwotzki, Nielsen, Pan, Patat, Piro, Pritchet, Reiners, Rest, Romani, Schaefer, Schaefer, Schaefer, Schaefer, Shen, Simon, Starrfield, Stassun, Tutukov, van den Heuvel, van Teeseling, Verbunt, Wang, Wheeler, Wheeler, Wheeler, Willems, Wu, Zahn, Zahn   +73 more
core   +1 more source

The Mass of the White Dwarf Companion in the Self-Lensing Binary KOI-3278: Einstein vs. Newton [PDF]

, 2019
KOI-3278 is a self-lensing stellar binary consisting of a white-dwarf secondary orbiting a Sun-like primary star. Kruse and Agol (2014) noticed small periodic brightenings every 88.18 days in the Kepler photometry and interpreted these as the result of ...
Agol, Eric, Brewer, John M., Buchhave, Lars A., Fulton, Benjamin J., Howard, Andrew W., Isaacson, Howard, Kruse, Ethan, Latham, David W., Petigura, Erik A., Quinn, Samuel N., Shporer, Avi, Shvartzvald, Yossi, Yahalomi, Daniel A.   +12 more
core   +2 more sources

Spatially Resolved Mapping of Voltage‐Gated Proton Channel Activity Reveals Delayed Proton Transport in Local Microenvironments

Advanced Science, EarlyView.
A revolutionary imaging platform integrating quantitative single‐molecule photobleaching with ratiometric fluorescence probes enables high‐throughput (≈2300 individually resolvable channels) mapping of individual proton channels in a large field (≈3000 µm2), overcoming the spatial and temporal limitations of conventional electrophysiology.
Jiahua Zhuang, Yang Xu, Yuxian Lu, Shiyang Lyu, Jie Tan, Jiandong Feng   +5 more
wiley   +1 more source

Nuclear Mixing Meters for Classical Novae [PDF]

, 2013
Classical novae are caused by mass transfer episodes from a main sequence star onto a white dwarf via Roche lobe overflow. This material forms an accretion disk around the white dwarf.
Champagne, Art, Downen, Lori, Iliadis, Christian, José, Jordi, Kelly, Keegan J.   +4 more
core   +3 more sources

White Dwarf Cooling Curves and Searches For White Dwarfs [PDF]

Highlights of Astronomy, 1998
White dwarf (WD) evolution is essentially a cooling problem in two parts. Degenerate electrons in the core provide the support while non-degenerate C and O ions provide the thermal reservoir (Koester & Chanmugam 1990, Kawaler 1996). The rate of energy loss through the non-degenerate envelope of H and He—segregated by gravitational settling—is ...
openaire   +2 more sources

An unusual white dwarf star may be a surviving remnant of a subluminous Type Ia supernova [PDF]

Science, 2017
Unusual star may be supernova debris Type Ia supernovae occur when a white dwarf star is completely destroyed in a thermonuclear explosion. Recently, another class of supernova has been found, dubbed type Iax; these look like type Ia but are much fainter
S. Vennes, P. Németh, A. Kawka, J. Thorstensen, V. Khalack, L. Ferrario, E. Alper   +6 more
semanticscholar   +1 more source

SpaBalance: Balanced Learning for Efficient Spatial Multi‐Omics Decoding

Advanced Science, EarlyView.
SpaBalance is a computational framework that harmonizes multi‐omics learning via gradient equilibrium and dual‐stream feature decomposition, achieving superior clustering accuracy, biological interpretability, and scalable integration of three or more spatial omics modalities.
Yingbo Cui, Yong Zhao, Canqun Yang, Tao Tang, Xiangke Liao, Hongyu Zhang, Huiying Zhao, Zheng Wang, Yuansong Zeng   +8 more
wiley   +1 more source

A Test of Spectroscopic Age Estimates of White Dwarfs Using Wide WD+WD Binaries

The Astrophysical Journal
White dwarf stars have been used for decades as precise and accurate age indicators. This work presents a test of the reliability of white dwarf total ages when spectroscopic observations are available. We conduct follow-up spectroscopy of 148 individual
Tyler M. Heintz, J. J. Hermes, P.-E. Tremblay, Lou Baya Ould Rouis, Joshua S. Reding, B. C. Kaiser, Jennifer L. van Saders   +6 more
doaj   +1 more source

Ages of White Dwarf-Red Subdwarf Systems

, 2005
We provide the first age estimates for two recently discovered white dwarf-red subdwarf systems, LHS 193AB and LHS 300AB. These unusual systems provide a new opportunity for linking the reliable age estimates for the white dwarfs to the (measurable ...
Bessel M. S., Hektor Monteiro, John Subasavage, Thom Beaulieu, Todd Henry, Weidemann V., Weidemann V., Weidemann V., Wei‐Chun Jao, Wood M. A.   +9 more
core   +2 more sources

Extensive photometry of the WZ Sge-type dwarf nova V455 And (HS2331+3905): detection of negative superhumps and coherence features of the short-period oscillations [PDF]

, 2015
We report the results of photometry of the WZ Sge-type dwarf nova V455 And. Observations were obtained over 19 nights in 2013 and 2014. The total duration of the observations was 96 h.
Kozhevnikov, V. P.
core   +1 more source