Results 81 to 90 of about 823 (184)

Robust joint modelling of sparsely observed paired functional data

Canadian Journal of Statistics, Volume 52, Issue 3, Page 734-754, September 2024.
Abstract A reduced‐rank mixed‐effects model is developed for robust modelling of sparsely observed paired functional data. In this model, the curves for each functional variable are summarized using a few functional principal components, and the association of the two functional variables is modelled through the association of the principal component ...
Huiya Zhou, Xiaomeng Yan, Lan Zhou
wiley   +1 more source

Asteroid (101955) Bennu in the laboratory: Properties of the sample collected by OSIRIS‐REx

Meteoritics &Planetary Science, Volume 59, Issue 9, Page 2453-2486, September 2024.
Abstract On September 24, 2023, NASA's OSIRIS‐REx mission dropped a capsule to Earth containing ~120 g of pristine carbonaceous regolith from Bennu. We describe the delivery and initial allocation of this asteroid sample and introduce its bulk physical, chemical, and mineralogical properties from early analyses.
Dante S. Lauretta, Harold C. Connolly Jr, Joseph E. Aebersold, Conel M. O'D. Alexander, Ronald‐L. Ballouz, Jessica J. Barnes, Helena C. Bates, Carina A. Bennett, Laurinne Blanche, Erika H. Blumenfeld, Simon J. Clemett, George D. Cody, Daniella N. DellaGiustina, Jason P. Dworkin, Scott A. Eckley, Dionysis I. Foustoukos, Ian A. Franchi, Daniel P. Glavin, Richard C. Greenwood, Pierre Haenecour, Victoria E. Hamilton, Dolores H. Hill, Takahiro Hiroi, Kana Ishimaru, Fred Jourdan, Hannah H. Kaplan, Lindsay P. Keller, Ashley J. King, Piers Koefoed, Melissa K. Kontogiannis, Loan Le, Robert J. Macke, Timothy J. McCoy, Ralph E. Milliken, Jens Najorka, Ann N. Nguyen, Maurizio Pajola, Anjani T. Polit, Kevin Righter, Heather L. Roper, Sara S. Russell, Andrew J. Ryan, Scott A. Sandford, Paul F. Schofield, Cody D. Schultz, Laura B. Seifert, Shogo Tachibana, Kathie L. Thomas‐Keprta, Michelle S. Thompson, Valerie Tu, Filippo Tusberti, Kun Wang, Thomas J. Zega, C. W. V. Wolner, the OSIRIS‐REx Sample Analysis Team   +54 more
wiley   +1 more source

Solvatomorphism in a series of copper(II) complexes with the 5‐phenylimidazole/perchlorate system as ligands

Acta Crystallographica Section B, Volume 80, Issue 4, Page 347-359, August 2024.
The reactions of Cu(ClO4)2·6H2O and L′H in a variety of solvents have provided access to 12 solvatomorphs of the general formula [Cu(ClO4)2(LH)4]·x(solvent); the effect of the solvents on the packing of the complexes is critically discussed.In the course of an investigation of the supramolecular behaviour of copper(II) complexes with the 5 ...
Edward Loukopoulos, Constantina Papatriantafyllopoulou, Eleni Moushi, Alexandros A. Kitos, Anastasios J. Tasiopoulos, Spyros P. Perlepes, Vassilios Nastopoulos   +6 more
wiley   +1 more source

Three-dimensional Structure of Incomplete Carbon–Oxygen Detonations in Type Ia Supernovae

The Astrophysical Journal
Carbon–oxygen (CO) detonation with reactions terminating either after burning of ^12 C in the leading ^12 C +  ^12 C reaction or after burning of ^12 C and ^16 O to Si-group elements may occur in the low-density outer layers of exploding white dwarfs and
A. Khokhlov, I. Domínguez, A. Y. Chtchelkanova, P. Hoeflich, E. Baron, K. Krisciunas, M. Phillips, N. Suntzeff, L. Wang   +8 more
doaj   +1 more source

Neutronization during Type Ia Supernova Simmering

The Astrophysical Journal, 2008
Prior to the incineration of a white dwarf (WD) that makes a Type Ia supernova (SN Ia), the star "simmers" for ~1000 years in a convecting, carbon burning region. We have found that weak interactions during this time increase the neutron excess by an amount that depends on the total quantity of carbon burned prior to the explosion. This contribution is
Piro, Anthony L., Bildsten, Lars
openaire   +2 more sources

SN 2024gy: Multiepoch Spectroscopic Features Suggestive of Delayed Detonation in a Type Ia Supernova

The Astrophysical Journal
We present photometric and spectroscopic observations of SN 2024gy, a Type Ia supernova (SN Ia) exhibiting high-velocity features (HVFs) in its early-time spectra. This SN reaches a peak B -band magnitude of −19.25 ± 0.29 mag and subsequently declines by
Liping Li, Zhenyu Wang, Jialian Liu, Yu Pan, Alexei V. Filippenko, Jujia Zhang, Xiaofeng Wang, Brajesh Kumar, Yi Yang, Thomas G. Brink, WeiKang Zheng, Xiangcun Meng, Lingzhi Wang, Zeyi Zhao, Qian Zhai, Yongzhi Cai, Giuliano Pignata, Xinlei Chen, Xingzhu Zou, Jiewei Zhao, Xiangkun Liu, Xiaowei Liu, Xinzhong Er, A. Reguitti, R. Michael Rich, Jon M. Rees, Mark A. Croom, Osmin Caceres, K. Itagaki, Bo Wang, Jinming Bai   +30 more
doaj   +1 more source

SN 2023ehl: A Normal Type Ia Supernova with High-velocity Features

The Astrophysical Journal
SN 2023ehl, a normal Type Ia supernova with a typical decline rate, was discovered in the galaxy UGC 11555 and offers valuable insights into the explosion mechanisms of white dwarfs.
Xiangyun Zeng, Lei Hu, Sheng Zheng, Xiaolong Li, Xiaoyu Luo, Sai Li, D. Andrew Howell, Yize Dong, Stefano Valenti, Liping Fu, Cheng Liu, Shiyu Li, Shuguang Zeng, Yao Huang, Yijing Luo, K. Azalee Bostroem, Curtis McCully, Ali Esamdin, Moira Andrews, Joseph R. Farah, Megan Newsome, Giacomo Terreran, Estefania Padilla Gonzalez, Emily Hoang, Aravind Pazhayath Ravi, Darshana Mehta, Nicolas Meza Retamal, Peng Zhang, Rongjun Zhang, Wang Li, Haonan Zhang   +30 more
doaj   +1 more source

The Spatial Distribution of Type Ia Supernovae within Host Galaxies

The Astronomical Journal
We study how type Ia supernovae (SNe Ia) are spatially distributed within their host galaxies, using data taken from the Sloan Digital Sky Survey (SDSS).
Christopher Pritchet, Karun Thanjavur, Connor Bottrell, Yan Gao   +3 more
doaj   +1 more source

Type Ia supernovae

This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by Ilya Mandel, section editor Jeffrey Andrews) to be published by Elsevier as a Reference Module. 18 pages, 7 figures.
openaire   +3 more sources

A Common Origin of Normal Type Ia Supernovae Suggested by the Photometric Diversity

The Astrophysical Journal
In recent years, with the increasing number of type Ia supernovae (SNe Ia) discovered soon after their explosions, a nonnegligible fraction of SNe Ia with early-excess emissions (EExSNe Ia) have been confirmed.
Weiyu Wu, Ji-an Jiang, Dezheng Meng, Zelin Xu, Keiichi Maeda, Mamoru Doi, Ken’ichi Nomoto, Naoki Yasuda, Masaomi Tanaka, Toshikazu Shigeyama, Nozomu Tominaga, Željko Ivezić, Peter Yoachim, Saurabh W. Jha, Tinggui Wang, Hisanori Furusawa, Nao Suzuki, Andrew J. Connolly, Satoshi Miyazaki   +18 more
doaj   +1 more source