Results 121 to 130 of about 720,446 (211)

Supernovae and transients with circumstellar interaction. [PDF]

R Soc Open Sci, 2020
Fraser M.
europepmc   +1 more source

Luminous Wolf-Rayet stars at low metallicity

, 2015
The evolution of massive stars in very low metallicity galaxies is less well observationally constrained than in environments more similar to the Milky Way, M33, or the LMC. We discuss in this contribution the current state of our program to search for
Bomans, Dominik J., Kleemann, B., Pasquali, A., Becker, Andrew C., Weis, K.   +4 more
core  

A Fleeting GLIMPSE of N/O Enrichment at Cosmic Dawn: Evidence for Wolf Rayet N Stars in a z = 6.1 Galaxy

The Astrophysical Journal
We present the discovery of extreme nitrogen enrichment by Wolf Rayet nitrogen (WN) stars in the metal-poor (∼10% Z _⊙ ), lensed, compact ( R _eff  ∼ 20 pc) galaxy RXCJ2248 at z = 6.1, revealed by unprecedentedly deep JWST/NIRSpec medium-resolution ...
Danielle A. Berg, Rohan P. Naidu, John Chisholm, Hakim Atek, Seiji Fujimoto, Vasily Kokorev, Lukas J. Furtak, Chiaki Kobayashi, Daniel Schaerer, Angela Adamo, Qinyue Fei, Damien Korber, Jorryt Matthee, Rui Marques-Chaves, Zorayda Martinez, Kristen. B. W. McQuinn, Julian B. Muñoz, Pascal A. Oesch, Alberto Saldana-Lopez, Daniel P. Stark, Mabel G. Stephenson, Tiger Yu-Yang Hsiao   +21 more
doaj   +1 more source

Southern massive stars at high angular resolution

Astronomy & Astrophysics
WR 25 is a massive colliding-wind binary in the Carina nebula comprising a WN6ha primary star with an O5 companion in an eccentric 208-day orbit. Recent spectroscopic analysis estimates the total binary mass to approach 100 M⊙, and a primary-to-secondary
Deshmukh K., Mahy L., Sana H., Frost A. J., Gosset E., Lanthermann C., LeBouquin J.-B., Pauli D., Shenar T.   +8 more
doaj   +1 more source

Nucleation experiments on a titanium-carbon system imply nonclassical formation of presolar grains. [PDF]

Sci Adv, 2023
Kimura Y, Tanaka KK, Inatomi Y, Aktas C, Blum J.   +4 more
europepmc   +1 more source

Rapid Chemical Enrichment by Intermittent Star Formation in GN-z11

The Astrophysical Journal Letters
We interpret the peculiar supersolar nitrogen abundance recently reported by the James Webb Space Telescope observations for GN-z11 ( z = 10.6) using our state-of-the-art chemical evolution models.
Chiaki Kobayashi, Andrea Ferrara
doaj   +1 more source

Formation of black holes from He stars

Astronomy & Astrophysics
Massive He stars are potential candidates of type Ib/c supernova (SN) progenitors. Understanding their final fates remains a key issue in astrophysics.
Long Gang, Wang Bo, Podsiadlowski Philipp, Liu Dongdong, Guo Yunlang, Zha Shuai, Song Hanfeng, Han Zhanwen   +7 more
doaj   +1 more source

Physics-guided Deep Learning for the Classification of Wolf–Rayet Stars in DESI

The Astrophysical Journal Supplement Series
Wolf–Rayet (W-R) stars, which represent a key evolutionary stage of massive stars, exhibit strong stellar winds and broad emission lines. These features serve as direct tracers of stellar feedback and chemical enrichment in star-forming regions ...
Haoran Liu, Hongtai Li, Ruijie Li, Bin Jiang   +3 more
doaj   +1 more source

Photometric variability of nitrogen-rich Wolf-Rayet stars in Magellanic Clouds with OGLE

Astronomy & Astrophysics
Aims. We present a comprehensive analysis of the photometric variability of (presumably single) nitrogen-rich Wolf-Rayet (WN) stars in the Magellanic Clouds, using long-term observations from the OGLE survey. Methods.
Marković J., Sáez-Cano G., Nazé Y., Rubio-Díez M. M., Soszyński I., Udalski A.   +5 more
doaj   +1 more source

Eleven New Heavily Reddened Field Wolf–Rayet Stars [PDF]

, 2012
We report the results of a medium-narrowband 2 μm line survey covering 5.8 deg^2 near the Galactic plane. We confirm 11 new field Wolf-Rayet stars along three lines of sight probing the inner Galaxy, demonstrating the capability to uncover distant and ...
Cushing, Michael, Kulesa, Craig, Smith, J. D. T., Barletta, Anthony, McCarthy, Don, Van Dyk, Schuyler D.   +5 more
core