Results 31 to 40 of about 3,913,690 (210)

Search for Supernova Progenitor Stars with ZTF and LSST

The Astrophysical Journal, 2023
The direct detection of core-collapse supernova (SN) progenitor stars is a powerful way of probing the last stages of stellar evolution. However, detections in archival Hubble Space Telescope images are limited to about one detection per year.
Nora L. Strotjohann, Eran O. Ofek, Avishay Gal-Yam, Jesper Sollerman, Ping Chen, Ofer Yaron, Barak Zackay, Nabeel Rehemtulla, Phillipe Gris, Frank J. Masci, Ben Rusholme, Josiah Purdum   +11 more
doaj   +1 more source

The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor [PDF]

, 2018
Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae1. However, while such stars are observed with masses >25 M⊙ (ref. 2), detections of >18 M⊙progenitors remain elusive1.
K. Maguire, Gonzalez, C., L. Galbany, Dessart, L., M. Huber, Agliozzo, C., Flewelling, H., H. Flewelling, Sullivan, M., Anderson, P., L. Dessart, T. -W. Chen, Young, D. R.; id_orcid, Galbany, Lluis, T. B. Lowe, N. Morrell, Jerkstrand, A., Valenti, S., Stritzinger, M. D., A. Jerkstrand, Maguire, K., Contreras, C., Lowe, T., C. Inserra, S. Mattila, E. Magnier, Chambers, K. C., S. Castellón, G. Hosseinzadeh, Lowe, T. B., M. M. Phillips, Smartt, S., Phillips, M., González-Gaitán, S., González Gaitán, Santiago, Gutiérrez, C. P., Smartt, S. J., Chambers, K., Krühler, T., J. Sollerman, M. D. Stritzinger, S. Valenti, Chen, T.-W., Phillips, M. M., Fraser, M., Hsiao, E., Sollerman, J., Huber, M., Anderson, J., Dessart, Luc, Smartt, S. J.; id_orcid, E. Y. Hsiao, Castellon, Sergio, Young, D., Chen, T., Gutierrez, C., C. Contreras, Galbany, L., Magnier, E., Mattila, S., C. Gonzalez, T. Krühler, Young, D. R., S. González-Gaitán, Sollerman, Jesper,, E. Kankare, Hsiao, E. Y., D. R. Young, J. P. Anderson, Stritzinger, M., Hosseinzadeh, G., Anderson, J. P., C. Agliozzo, M. Sullivan, C. P. Gutiérrez, M. Fraser, Chen, T. -W., K. C. Chambers, S. J. Smartt, Castellón, S., Kankare, E., Inserra, C., Morrell, N.   +82 more
core   +4 more sources

Physical Properties of 5000 Cool Large Magellanic Cloud Supergiants with Gaia XP Spectra: A Detailed Portrait of the Upper H-R Diagram Hints at Missing Supernova Progenitors

The Astrophysical Journal, 2023
Characterizing the physical properties of cool supergiants allows us to probe the final stages of a massive star’s evolution before it undergoes core collapse. Despite their importance, the fundamental properties of these stars— $\mathrm{log}{T}_{\mathrm{
Trevor Z. Dorn-Wallenstein, Kathryn F. Neugent, Emily M. Levesque   +2 more
doaj   +1 more source

Atmospheres, magnetism, mass loss of red supergiant stars [PDF]

Proceedings of the International Astronomical Union, 2014
AbstractRed supergiant stars (RSGs) are not only a key evolutionary stage of massive stars participating in the chemical evolution of galaxies, they also represent a fantastic and challenging laboratory of (magneto-)hydrodynamics. We present recent results and on-going research on mass loss, atmospheres, and polarimetric studies of RSGs that reveal a ...
Josselin, E., Lambert, J., Auriere, M., Petit, P., Ryde, N.   +4 more
openaire   +1 more source

Left Ringing: Betelgeuse Illuminates the Connection between Convective Outbursts, Mode Switching, and Mass Ejection in Red Supergiants

The Astrophysical Journal, 2023
Betelgeuse, the nearest red supergiant, dimmed to an unprecedented level in early 2020. The star emerged from this “Great Dimming” episode with its typical, roughly 400 days pulsation cycle halved, and a new dominant period of around 200 days.
Morgan MacLeod, Andrea Antoni, Caroline D. Huang, Andrea Dupree, Abraham Loeb   +4 more
doaj   +1 more source

On ageing star clusters using red supergiants independent of the fraction of interacting binary stars [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2020
ABSTRACT We use the Binary Population and Spectral Synthesis models to test the recent suggestion that red supergiants can provide an accurate age estimate of a coeval stellar population that is unaffected by interacting binary stars. Ages are estimated by using both the minimum luminosity of red supergiants and the mean luminosity of ...
J J Eldridge, Emma R Beasor, N Britavskiy   +2 more
openaire   +2 more sources

The main sequence of three red supergiant clusters [PDF]

, 2013
Massive clusters in our Galaxy are an ideal testbed to investigate the properties and evolution of high-mass stars. They provide statistically significant samples of massive stars of uniform ages. To accurately determine the intrinsic physical properties
Scholz, Alexander, Froebrich, Dirk
core   +1 more source

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. V. The Star Formation History of Sagittarius Dwarf Irregular Galaxy Derived from Long-period Variable Stars

The Astrophysical Journal, 2023
We conducted an optical monitoring survey of the Sagittarius dwarf irregular galaxy (SagDIG) during the period of 2016 June–2017 October, using the 2.5 m Isaac Newton Telescopeat La Palama.
Tahere Parto, Shahrzad Dehghani, Atefeh Javadi, Elham Saremi, Jacco Th. van Loon, Habib G. Khosroshahi, Iain McDonald, Mohammad T. Mirtorabi, Mahdieh Navabi, Maryam Saberi   +9 more
doaj   +1 more source

What Physical Factors Influence the Transformation between Blue Supergiants and Red Supergiants?

The Astrophysical Journal
The post-main-sequence evolution of massive stars is highly sensitive to key stellar model parameters, particularly initial rotational velocity and metallicity.
Yun He, Hanfeng Song, Georges Meynet, Andre Maeder, Ruiyu Zhang, Ying Qin, Shitao Qi, Qingli Li, Qiong Zhan   +8 more
doaj   +1 more source

Undulating stratigraphy of a carbonate inner ramp lagoon and associated architectural facies heterogeneity: An example from the Late Jurassic Hanifa Formation, Central Saudi Arabia

Sedimentology, Volume 72, Issue 3, Page 734-762, April 2025.
Abstract This study offers new insights into the internal architecture of shallow marine carbonate sediments deposited in an epeiric sea formed on a broadly flooded passive margin continental shelf. The Ullayah Member of the Late Jurassic Hanifa Formation is exposed along the Tuwaiq Mountain Escarpment in Central Saudi Arabia and serves as an example ...
Pankaj Khanna, Ahmad R. Ramdani, Gaurav S. Gairola, Teyyuba Adigozalova, David Hodgetts, Volker C. Vahrenkamp   +5 more
wiley   +1 more source