Results 51 to 60 of about 4,008 (285)

X-ray emission from optical novae in M 31

, 2009
The first supersoft source (SSS) identification with an optical nova in M 31 was based on ROSAT observations. Twenty additional X-ray counterparts (mostly identified as SSS by their hardness ratios) were detected using archival ROSAT, XMM-Newton and ...
Darnley, Della Valle, Della Valle, Di Stefano, Drake, Greiner, Haberl, Haberl, Hachisu, Hachisu, Henze, Henze, Henze, José, Kaaret, Kong, Lee, MacDonald, Nedialkov, Ness, Orio, Osborne, Osborne, Pietsch, Pietsch, Pietsch, Pietsch, Riffeser, Sala, Sala, Shafter, Shafter, Shafter, Smirnova, Smirnova, Supper, Supper, Trudolyubov, Tuchman, Voss, Yaron, Ögelman   +41 more
core   +1 more source

The Progenitors of Type Ia Supernovae: II. Are they Double-Degenerate Binaries? The Symbiotic Channel [PDF]

, 2010
In order for a white dwarf (WD) to achieve the Chandrasekhar mass, M_C, and explode as a Type Ia supernova (SNIa), it must interact with another star, either accreting matter from or merging with it.
Brown, Cappellaro, Cassisi, Catalán, Di Stefano, Di Stefano, Di Stefano, Di Stefano, Di Stefano, Di Stefano, Di Stefano, Di Stefano, Dilday, Fabbiano, Genzel, Ghez, Ghez, Graham, Kalirai, Kato, Kenyon, Kotak, Kuznetsova, Liu, Magrini, Nelson, Nomoto, Nomoto, Orio, Panagia, Pence, Piersanti, R. Di Stefano, Riess, Salim, Sarazin, Shen, Swartz, Weidemann, Williams   +39 more
core   +1 more source

CIRCUMSTELLAR SHELL FORMATION IN SYMBIOTIC RECURRENT NOVAE [PDF]

The Astrophysical Journal, 2012
We present models of spherically symmetric recurrent nova shells interacting with circumstellar material in a symbiotic system composed of a red giant expelling a wind, and a white dwarf accreting from this material. Recurrent nova eruptions periodically eject material at high velocities ($\gtrsim 10^3$ km/s) into the red giant wind profile, creating a
Moore, Kevin, Bildsten, Lars
openaire   +2 more sources

3D‐Printed Piezoionic/Bioelectronic Hydrogel for Electro‐Metabolic Regulation of Osteogenic Differentiation

Advanced Healthcare Materials, EarlyView.
A 3D‐printed piezoionic GPMx hydrogel enables stable electromechanical signal generation under mechanical loading, exhibiting long‐term durability and low fatigue. As a bioactive patch, it restores endogenous bioelectricity to stimulate osteogenesis via Ca2+ influx and mitochondrial activation, while simultaneously enabling label‐free alkaline ...
Sayan Deb Dutta, Myoung Joon Jeon, Youjin Seol, Ki‐Taek Lim   +3 more
wiley   +1 more source

Exploring the Maximum Magnitude versus Rate of Decline Relation for Novae in M31

The Astrophysical Journal Supplement Series
The results of a two-decade-long R -band photometric survey of novae in M31 are presented. From these data, R -band light curves have been determined for 180 novae with data sufficient for estimating the peak brightness and subsequent rate of decline ...
J. Grace Clark, Kamil Hornoch, Allen W. Shafter, Hana Kučáková, Jan Vraštil, Peter Kušnirák, Marek Wolf   +6 more
doaj   +1 more source

Observations and simulations of recurrent novae: U Sco and V394 CrA [PDF]

, 1988
Observations and analysis of the Aug. 1987 outburst of the recurrent nova V394 CrA are presented. This nova is extremely fast and its outburst characteristics closely resemble those of the recurrent nova U Sco.
Ferland, Gary, Gehrz, Robert D., Heathcote, S., Kenyon, Scott, Ney, Edward P., Shaviv, G., Sonneborn, G., Sparks, Warren M., Starrfield, S., Williams, R. E.   +9 more
core   +1 more source

Constraining the role of novae as progenitors of Type Ia Supernovae [PDF]

, 2015
(Abridged) White dwarfs (WDs) undergoing unstable nuclear burning on their surfaces, resulting in the nova phenomenon, have been considered as one of the prospective candidates for the still elusive progenitors of SNeIa.
Gilfanov, Marat, Soraisam, Monika
core   +2 more sources

A remarkable recurrent nova in M 31: The optical observations [PDF]

Astronomy & Astrophysics, 2014
4 pages, 4 figures, accepted for publication in Astronomy & Astrophysics Letters (updated to mirror accepted version)
Darnley, M. J., Williams, S. C., Bode, M. F., Henze, M., Ness, J.-u., Shafter, A. W., Hornoch, K., Votruba, V.   +7 more
openaire   +4 more sources

A Cryoprotectant‐Compatible Nanoporous Platform for Stable and Scalable Delivery of Biopharmaceuticals

Advanced Materials, EarlyView.
A cryoprotectant‐compatible nanoporous platform enables ambient‐stable and scalable delivery of gene editing therapeutics. By combining hierarchical pore architecture with optimized lyophilization chemistry, the system preserves Cas9‐RNP activity post‐freeze‐drying.
Sian Lee, Seongchan Kim, Jooyeun Chong, Min‐gyeong Kim, Kayeong Lim, Nan‐Ee Lee, Jahyun Koo, Jiheong Kang, Hyojin Lee   +8 more
wiley   +1 more source

Orbital Period Changes of Recurrent Nova U Scorpii Demonstrate That Mejecta = 26 × Maccreted, So U Sco Is Not a Type Ia Supernova Progenitor

The Astrophysical Journal
Recurrent nova U Scorpii (U Sco) is one of the prototypes for a Type Ia supernova progenitor. The logic is that the white dwarf is near the Chandrasekhar mass and gas is accumulating onto its surface at a near-maximal accretion rate, so it will soon ...
Bradley E. Schaefer, Gordon Myers
doaj   +1 more source