Results 1 to 10 of about 773 (137)

Modified Gravity: From Black Holes Entropy to Current Cosmology, 4th Edition [PDF]

Entropy
Recent cosmological observational data—such as type Ia supernovae (SNe Ia) [...]
Kazuharu Bamba
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SN 2016ije: An SN 2002es-like Type Ia Supernova Exploded in a Metal-poor and Low-surface Brightness Galaxy

The Astrophysical Journal, 2023
We have conducted photometric and spectroscopic observations of the peculiar Type Ia supernova (SN Ia) 2016ije that was discovered through the Tsinghua-NAOC Transient Survey.
Zhitong Li, Tianmeng Zhang, Xiaofeng Wang, Jujia Zhang, Lluís Galbany, Alexei V. Filippenko, Thomas G. Brink, Chris Ashall, WeiKang Zheng, Thomas de Jaeger, Fabio Ragosta, Maxime Deckers, Mariusz Gromadzki, D. R. Young, Gaobo Xi, Juncheng Chen, Xulin Zhao, Hanna Sai, Shengyu Yan, Danfeng Xiang, Zhihao Chen, Wenxiong Li, Bo Wang, Hu Zou, Jipeng Sui, Jiali Wang, Jun Ma, Jundan Nie, Suijian Xue, Xu Zhou, Zhimin Zhou   +30 more
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The Luminous Type Ia Supernova 2022ilv and Its Early Excess Emission

The Astrophysical Journal Letters, 2023
We present observations and analysis of the hostless and luminous Type Ia supernova 2022ilv, illustrating it is part of the 2003fg-like family, often referred to as super-Chandrasekhar (Ia-SC) explosions. The Asteroid Terrestrial-impact Last Alert System
Shubham Srivastav, S. J. Smartt, M. E. Huber, G. Dimitriadis, K. C. Chambers, Michael D. Fulton, Thomas Moore, F. P. Callan, James H. Gillanders, K. Maguire, M. Nicholl, Luke J. Shingles, S. A. Sim, K. W. Smith, J. P. Anderson, Thomas de Boer, Ting-Wan Chen, Hua Gao, D. R. Young   +18 more
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A Systematic Study of Ia-CSM Supernovae from the ZTF Bright Transient Survey

The Astrophysical Journal, 2023
Among the supernovae (SNe) that show strong interaction with a circumstellar medium (CSM), there is a rare subclass of Type Ia supernovae, SNe Ia-CSM, which show strong narrow hydrogen emission lines much like SNe IIn but on top of a diluted Type Ia ...
Yashvi Sharma, Jesper Sollerman, Christoffer Fremling, Shrinivas R. Kulkarni, Kishalay De, Ido Irani, Steve Schulze, Nora Linn Strotjohann, Avishay Gal-Yam, Kate Maguire, Daniel A. Perley, Eric C. Bellm, Erik C. Kool, Thomas G. Brink, Rachel Bruch, Maxime Deckers, Richard Dekany, Alison Dugas, Alexei V. Filippenko, Samantha Goldwasser, Matthew J. Graham, Melissa L. Graham, Steven L. Groom, Matt Hankins, Jacob Jencson, Joel P. Johansson, Viraj Karambelkar, Mansi M. Kasliwal, Frank J. Masci, Michael S. Medford, James D. Neill, Guy Nir, Reed L. Riddle, Mickael Rigault, Tassilo Schweyer, Jacco H. Terwel, Lin Yan, Yi Yang, Yuhan Yao   +38 more
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Unprecedented Early Flux Excess in the Hybrid 02es-like Type Ia Supernova 2022ywc Indicates Interaction with Circumstellar Material

The Astrophysical Journal Letters, 2023
We present optical photometric and spectroscopic observations of the 02es-like type Ia supernova (SN) 2022ywc. The transient occurred in the outskirts of an elliptical host galaxy and showed a striking double-peaked light curve with an early excess ...
Shubham Srivastav, T. Moore, M. Nicholl, M. R. Magee, S. J. Smartt, M. D. Fulton, S. A. Sim, J. M. Pollin, L. Galbany, C. Inserra, A. Kozyreva, Takashi J. Moriya, F. P. Callan, X. Sheng, K. W. Smith, J. S. Sommer, J. P. Anderson, M. Deckers, M. Gromadzki, T. E. Müller-Bravo, G. Pignata, A. Rest, D. R. Young   +22 more
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Axion-like Particles from Nearby Type Ia Supernovae [PDF]

EPJ Web of Conferences, 2022
Axion-like particles (ALPs) are a class of hypothetical pseudo-scalar particles and can be created in hot astrophysical plasma through the interaction between photons. I calculate the production of ALPs in type Ia supernovae.
Mori Kanji
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A Possible Surviving Companion of the SN Ia in the Galactic SNR G272.2-3.2

The Astrophysical Journal, 2023
We use the Gaia EDR3 to explore the Galactic supernova remnant (SNR) G272.2-3.2, produced by the explosion of a Type Ia supernova (SN Ia) about 7500 yr ago, to search for a surviving companion.
P. Ruiz-Lapuente, J. I. González Hernández, R. Cartier, K. Boutsia, F. Figueras, R. Canal, L. Galbany   +6 more
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Using Host Galaxy Photometric Redshifts to Improve Cosmological Constraints with Type Ia Supernovae in the LSST Era

The Astrophysical Journal, 2023
We perform a rigorous cosmology analysis on simulated Type Ia supernovae (SNe Ia) and evaluate the improvement from including photometric host galaxy redshifts compared to using only the “ z _spec ” subset with spectroscopic redshifts from the host or SN.
Ayan Mitra, Richard Kessler, Surhud More, Renee Hlozek, The LSST Dark Energy Science Collaboration   +4 more
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Four Years of Type Ia Supernovae Observed by TESS: Early-time Light-curve Shapes and Constraints on Companion Interaction Models

The Astrophysical Journal, 2023
We present 307 type Ia supernova (SN) light curves from the first 4 yr of the Transiting Exoplanet Survey Satellite mission. We use this sample to characterize the shapes of the early-time light curves, measure the rise times from first light to peak ...
M. M. Fausnaugh, P. J. Vallely, M. A. Tucker, C. S. Kochanek, B. J. Shappee, K. Z. Stanek, George R. Ricker, Roland Vanderspek, Manan Agarwal, Tansu Daylan, Rahul Jayaraman, Rebekah Hounsell, Daniel Muthukrishna   +12 more
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Examining the Properties of Low-luminosity Hosts of Type Ia Supernovae from ASAS-SN

The Astrophysical Journal, 2023
We present a spectroscopic analysis of 44 low-luminosity host galaxies of Type Ia supernovae (SNe Ia) detected by the All-Sky Automated Survey for Supernovae (ASAS-SN), using hydrogen, oxygen, and sulfur emission lines to measure metallicities and star ...
Thomas W.-S. Holoien, Vera L. Berger, Jason T. Hinkle, L. Galbany, Allison L. Strom, Patrick J. Vallely, Joseph P. Anderson, Konstantina Boutsia, K. D. French, Christopher S. Kochanek, Hanindyo Kuncarayakti, Joseph D. Lyman, Nidia Morrell, Jose L. Prieto, Sebastián F. Sánchez, K. Z. Stanek, Gregory L. Walth   +16 more
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