Results 71 to 80 of about 6,421 (225)

A Linear Relation between the Color Stretch s BV and the Rising Color Slope of Type Ia Supernovae

The Astrophysical Journal, 2023
Using data from the Complete Nearby (redshift z _host < 0.02) sample of Type Ia Supernovae (CNIa0.02), we find a linear relation between two parameters derived from the B − V color curves of Type Ia supernovae: the color stretch s _BV and the rising ...
Ping Chen, Subo Dong, Chris Ashall, S. Benetti, D. Bersier, S. Bose, Joseph Brimacombe, Thomas G. Brink, David A. H. Buckley, Enrico Cappellaro, Grant W. Christie, N. Elias-Rosa, Alexei V. Filippenko, Mariusz Gromadzki, Thomas W.-S. Holoien, Shaoming Hu, C. S. Kochanek, Robert Koff, Juna A. Kollmeier, P. Lundqvist, S. Mattila, Peter A. Milne, J. A. Muñoz, Robert Mutel, Tim Natusch, Joel Nicolas, A. Pastorello, Simon Prentice, J. L. Prieto, Tyler Roth, B. J. Shappee, Geoffrey Stone, K. Z. Stanek, M. D. Stritzinger, Todd A. Thompson, Lina Tomasella, Steven Villanueva   +36 more
doaj   +1 more source

Comparing the Locations of Supernovae to CO (2–1) Emission in Their Host Galaxies

The Astrophysical Journal, 2023
We measure the molecular gas environment near recent (
Ness Mayker Chen, Adam K. Leroy, Laura A. Lopez, Samantha Benincasa, Mélanie Chevance, Simon C. O. Glover, Annie Hughes, Kathryn Kreckel, Sumit Sarbadhicary, Jiayi Sun, Todd A. Thompson, Dyas Utomo, Frank Bigiel, Guillermo A. Blanc, Daniel A. Dale, Kathryn Grasha, J. M. Diederik Kruijssen, Hsi-An Pan, Miguel Querejeta, Eva Schinnerer, Elizabeth J. Watkins, Thomas G. Williams   +21 more
doaj   +1 more source

Spectropolarimetry of the Type Ia supernova 2012fr [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2013
AbstractSpectropolarimetry provides the means to probe the 3D geometries of supernovae (SNe) at early times. We report spectropolarimetric observations of the Type Ia SN 2012fr at four epochs: −11, −5, +2 and +24 d, with respect to B-light-curve maximum.
Maund, Justyn Robert, Spyromilio, J., Hoeflich, P.A., Wheeler, J.C., Baade, D., Clocchiatti, A., Patat, F., Reilly, E., Wang, L., Zelaya, P.   +9 more
openaire   +3 more sources

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

Extrapolation of Type Ia Supernova Spectra into the Near-infrared Using Principal Component Analysis

The Astrophysical Journal
We present a method of extrapolating the spectroscopic behavior of Type Ia supernovae (SNe Ia) in the near-infrared (NIR) wavelength regime up to 2.30 μ m using optical spectroscopy.
Anthony Burrow, E. Baron, Christopher R. Burns, Eric Y. Hsiao, Jing Lu, Chris Ashall, Peter J. Brown, James M. DerKacy, G. Folatelli, Lluís Galbany, P. Hoeflich, Kevin Krisciunas, N. Morrell, M. M. Phillips, Benjamin J. Shappee, Maximilian D. Stritzinger, Nicholas B. Suntzeff   +16 more
doaj   +1 more source

THE LOCAL HOSTS OF TYPE Ia SUPERNOVAE [PDF]

The Astrophysical Journal, 2009
We use multi-wavelength, matched aperture, integrated photometry from GALEX, SDSS and the RC3 to estimate the physical properties of 166 nearby galaxies hosting 168 well-observed Type Ia supernovae (SNe Ia). Our data corroborate well-known features that have been seen in other SN Ia samples.
Neill, J. D., Sullivan, M., Howell, D. A., Conley, Alex, Seibert, Mark, Martin, D. Christopher, Barlow, Tom A., Foster, Karl, Friedman, Peter G., Morrissey, Patrick, Neff, Susan G., Schiminovich, David, Wyder, Ted K., Bianchi, Luciana, Donas, José, Heckman, Timothy M., Lee, Young-Wook, Madore, Barry F., Milliard, Bruno, Rich, R. Michael, Szalay, Alex S.   +20 more
openaire   +3 more sources

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

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

Early-time Observations of SN 2023wrk: A Luminous Type Ia Supernova with Significant Unburned Carbon in the Outer Ejecta

The Astrophysical Journal
We present extensive photometric and spectroscopic observations of the nearby Type Ia supernova (SN) 2023wrk at a distance of about 40 Mpc. The earliest detection of this SN can be traced back to a few hours after the explosion. Within the first few days,
Jialian Liu, Xiaofeng Wang, Cristina Andrade, Pierre-Alexandre Duverne, Jujia Zhang, Liping Li, Zhenyu Wang, Felipe Navarete, Andrea Reguitti, Stefan Schuldt, Yongzhi Cai, Alexei V. Filippenko, Yi Yang, Thomas G. Brink, WeiKang Zheng, Ali Esamdin, Abdusamatjan Iskandar, Chunhai Bai, Jinzhong Liu, Xin Li, Maokai Hu, Gaici Li, Wenxiong Li, Xiaoran Ma, Shengyu Yan, Jun Mo, Christophe Adami, Dalya Akl, Sarah Antier, Eric Broens, Jean-Grégoire Ducoin, Eslam Elhosseiny, Thomas M. Esposito, Michael Freeberg, Priyadarshini Gokuldass, Patrice Hello, Sergey Karpov, Isabel Márquez, Martin Mašek, Oleksandra Pyshna, Yodgor Rajabov, Denis Saint-Gelais, Marc Serrau, Oleksii Sokoliuk, Ali Takey, Manasanun Tanasan, Damien Turpin   +46 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