Zobrazeno 1 - 10
of 5 261
pro vyhledávání: '"Red giant"'
Autor:
Elsworth, Yvonne1,2 y.p.elsworth@bham.ac.uk
Publikováno v:
EPJ Web of Conferences. 2017, Vol. 160, p1-4. 4p. 4 Graphs.
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L50 (2024)
Determining the evolutionary stage of stars is crucial for understanding the evolution of exoplanetary systems. In this context, red giant branch (RGB) and red clump (RC) stars, which formed at stages in the later evolution of stars situated before a
Externí odkaz:
https://doaj.org/article/1d5f49639c144bc39f37f9476dcf2412
Autor:
Zubairy, M. Suhail, author
Publikováno v:
A Mysterious Universe : Quantum Mechanics, Relativity, and Cosmology for Everyone, 2023, ill.
Externí odkaz:
https://doi.org/10.1093/oso/9780198883067.003.0014
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 2, p L43 (2024)
The tip of the red giant branch (TRGB) is an important standard candle for determining luminosity distances. Although several 10 ^5 small-amplitude red giant stars (SARGs) have been discovered, variability was previously considered irrelevant for the
Externí odkaz:
https://doaj.org/article/dff3c56e58a24af1841aacb64e23b1f5
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 181 (2024)
We investigate the absolute calibration of the tip of the red giant branch (TRGB) in the Small Magellanic Cloud (SMC) using small amplitude red giant stars (SARGs) classified by the Optical Gravitational Lensing Experiment (OGLE). We show that all st
Externí odkaz:
https://doaj.org/article/6c0b01dc7adf4e6f8b44e5bab986c881
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 131 (2024)
Black hole (BH) demographics in different environments is critical in view of recent results on massive star binarity, and of the multimessenger detectability of compact object mergers. But the identification and characterization of noninteracting BH
Externí odkaz:
https://doaj.org/article/214dbc5158094c13a69ec13279485731
Autor:
Siyang Li, Gagandeep S. Anand, Adam G. Riess, Stefano Casertano, Wenlong Yuan, Louise Breuval, Lucas M. Macri, Daniel Scolnic, Rachael Beaton, Richard I. Anderson
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 177 (2024)
The Hubble Tension, a >5 σ discrepancy between direct and indirect measurements of the Hubble constant ( H _0 ), has persisted for a decade and motivated intense scrutiny of the paths used to infer H _0 . Comparing independently derived distances fo
Externí odkaz:
https://doaj.org/article/af51ee0e95864a43b2b6c46367246201
Autor:
Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Ella Xi Wang, Yangyang Li, Zoe Hackshaw, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika Holmbeck, Vinicius M. Placco, Charli M. Sakari
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 125 (2024)
We present the discovery of 2MASS J05241392−0336543 (hereafter J0524−0336), a very metal-poor ([Fe/H] = −2.43 ± 0.16), highly r -process-enhanced ([Eu/Fe] = +1.34 ± 0.10) Milky Way halo field red giant star, with an ultrahigh Li abundance of
Externí odkaz:
https://doaj.org/article/787793d6ab884c2fabbad575dfea9b23
Autor:
Gagandeep S. Anand, R. Brent Tully, Yotam Cohen, Dmitry I. Makarov, Lidia N. Makarova, Joseph B. Jensen, John P. Blakeslee, Michele Cantiello, Ehsan Kourkchi, Gabriella Raimondo
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 83 (2024)
Differences between the local value of the Hubble constant measured via the distance ladder versus the value inferred from the cosmic microwave background with the assumption of the standard ΛCDM model have reached over 5 σ significance. To determi
Externí odkaz:
https://doaj.org/article/c5ff0f83b8224499b677204549d3d3b2