Results 81 to 90 of about 7,025,957 (218)

Phosphazene Base Mediated (sp3)CH Functionalization with CO2 and CS2

European Journal of Inorganic Chemistry, Volume 28, Issue 24, August 29, 2025.
Selective deprotonation of HCF3, HC2F5, and CH3CN by the phosphazene base EtP4 in the presence of CO2 or CS2 affords the phosphazenium carboxylates [EtP4H]+[F3CCO2]− and [EtP4H]+[F5C2CO2]−, as well as the corresponding dithiocarboxylates [EtP4H]+[F3CCS2]− and [EtP4H]+[F5C2CS2]−.
Katharina Wels, Beate Neumann, Jan‐Hendrik Lamm, Hans‐Georg Stammler, Berthold Hoge   +4 more
wiley   +1 more source

Ultraviolet diversity of Type Ia Supernovae [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
9 pages, 6 figures, submitted to ...
Foley, Ryan J., Pan, Yen-Chen, Brown, P., Filippenko, A. V., Fox, O. D., Hillebrandt, W., Kirshner, R. P., Marion, G. H., Milne, P. A., Parrent, J. T., Pignata, G., Stritzinger, M. D.   +11 more
openaire   +5 more sources

Type Ia Supernova Progenitor Properties and their Host Galaxies

The Astrophysical Journal
We present an eigenfunction method to analyze 161 visual light curves (LCs) of Type Ia supernovae (SNe Ia) obtained by the Carnegie Supernova Project to characterize their diversity and host-galaxy correlations.
Sudeshna Chakraborty, Benjamin Sadler, Peter Hoeflich, Eric Y. Hsiao, M. M. Phillips, C. R. Burns, T. Diamond, I. Dominguez, L. Galbany, S. A. Uddin, C. Ashall, K. Krisciunas, S. Kumar, T. B. Mera, N. Morrell, E. Baron, C. Contreras, M. D. Stritzinger, N. B. Suntzeff   +18 more
doaj   +1 more source

Organocatalytic C─O Bond Cleavage and Asymmetric Transformations via [1,3]‐Sigmatropic Rearrangement

Advanced Science, Volume 12, Issue 29, August 7, 2025.
A direct asymmetric strategy for fulfilling the functional group transfer by aryl ether cleavage and migration is developed, representing the first Brønsted base‐catalyzed asymmetric [1,3]‐sigmatropic rearrangement reaction. The resulting chiral benzofuran products generated through this strategy exhibit significant 3D‐dimensionality and demonstrate ...
Lei Peng, Yu Chang, Liangchen Yin, Jinbang Zhang, Xuli Feng, Pengfei Wang, Wenling Qin, Hailong Yan   +7 more
wiley   +1 more source

Luminosity distributions of Type Ia supernovae [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We have assembled a dataset of 165 low redshift ...
Ashall, C, Mazzali, PA, Sasdelli, M, Prentice, SJ   +3 more
openaire   +5 more sources

Optical Observations on the Young Type Ia SN 2021fxy with Detached High Velocity Features

The Astrophysical Journal
We present optical observations on the young type Ia supernova (SN Ia) SN 2021fxy obtained within a few days after the explosion, with a focus on its prominent high-velocity features (HVFs).
Liping Li, Jujia Zhang, Zhenyu Wang, Xiaofeng Wang, Qian Zhai, Shengyu Yan, Bo Wang, Jinming Bai   +7 more
doaj   +1 more source

The Progenitors of Superluminous Type Ia Supernovae

The Astrophysical Journal, 2023
Recent observations of type Ia supernovae (SNe Ia) have discovered a subclass of “super-Chandrasekhar” SNe Ia (SC SNe Ia) whose high luminosities and low ejecta velocities suggest that they originate from the explosions of white dwarfs (WDs) with masses ...
Margot Fitz Axen, Peter Nugent
doaj   +1 more source

THE SPECTROSCOPIC DIVERSITY OF TYPE Ia SUPERNOVAE [PDF]

The Astronomical Journal, 2012
36 pages (emulateapj), 23 figures. Accepted for publication in AJ. Spectroscopic data available at http://www.cfa.harvard.edu/supernova/SNarchive.html . New SNID template set available at http://marwww.in2p3.fr/~blondin/software/snid/index.html .
Blondin, S, Matheson, Thomas, Kirshner, Robert P, Mandel, K S, Berlind, P, Calkins, M, Challis, Peter M, Garnavich, Peter M, Jha, S W, Modjaz, M, Riess, A G, Schmidt, Brian, Riess, Adam   +12 more
openaire   +4 more sources

Zehn Jahre Gaia‐Messungen: Die hochgenaue Kartierung des Himmels

Physik in unserer Zeit, Volume 56, Issue 4, Page 175-183, July 2025.
Das astrometrische Weltraumobservatorium Gaia der Europäischen Weltraumorganisation hat die astrometrische Forschung revolutioniert, indem es unter anderem präzise Positionen, Bewegungen und Entfernungen von fast zwei Milliarden Himmelsobjekten gemessen hat. Damit stellt es wertvolle Daten für fast alle Gebiete der Astrophysik bereit. Nach dem Ende der
Stefan Jordan
wiley   +1 more source

Single Star Progenitors for Type Ia Supernovae

, 2016
Type Ia supernovae are identified as exploding degenerate stars. Their luminosity is due to the radioactive decay of about a solar mass of 56Ni through 56Co to 56Fe.
Lattanzio, John, Tout, Christopher A, Wickramasinghe, Dayal   +2 more
core   +1 more source