Zobrazeno 1 - 10
of 167
pro vyhledávání: '"Charles R. Cowley"'
Autor:
Charles R Cowley, Kutluay Yüce
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 512:3684-3690
Galactic chemical evolution (GCE), solar analogues or twins, and peculiarities of the solar composition with respect to the twins are inextricably related. We examine GCE parameters from the literature and present newly derived values using a quadrat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33893c9e61947ef9c4602e225cd2e0d0
https://doi.org/10.1093/mnras/stac637
https://doi.org/10.1093/mnras/stac637
Autor:
Charles R. Cowley, Robert E. Stencel
Publikováno v:
Research Notes of the AAS. 7:88
Properties of solar twins at kiloparsec distances from the local standard of rest are compared to solar twins within 100 pc of the Sun. They have a velocity distribution closely similar to that of the nearby twins in addition to closely matching T ef
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f13e753b2f17fc82874aa8f34ae78d83
https://doi.org/10.3847/2515-5172/acd1ea
https://doi.org/10.3847/2515-5172/acd1ea
Publikováno v:
Astronomische Nachrichten. 341:125-132
The precision differential abundance (PDA) technique is applied to the mid-F stars Procyon and $\theta$ Scl using spectra from the ESO UVESPOP library. We relate PDA patterns to endogenous processes related to condensation or to exogenous processes c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86c281829c2de9399bc0267e07ddd9d4
https://doi.org/10.1002/asna.202013694
https://doi.org/10.1002/asna.202013694
Autor:
Charles R. Cowley, Robert E. Stencel
Publikováno v:
Research Notes of the AAS. 6:198
The europium to barium ratio is both a clock and a measure of galactic chemical evolution of the r- and s-processes. We attribute much of the ratio’s vertical scatter to real abundance differences attributable to streams and diffusion into and out
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67c4c4e6e3ef766f7286f23f2ad561ca
https://doi.org/10.3847/2515-5172/ac94d1
https://doi.org/10.3847/2515-5172/ac94d1
Bedell et al. (2018) give precision differential abundances for 79 mostly G-dwarf stars. We correct these abundances for Galactic chemical evolution in a manner similar to that used by these authors but with parameters derived from linear fits to plo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1965a286e88152d1b4aa8749d3b65a9
http://arxiv.org/abs/2003.14336
http://arxiv.org/abs/2003.14336
Autor:
Charles R. Cowley, Kutluay Yüce
Publikováno v:
Research Notes of the AAS. 5:230
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ac44ed4800a1600910f6db98c450d11
https://doi.org/10.3847/2515-5172/ac2df8
https://doi.org/10.3847/2515-5172/ac2df8
Autor:
Kutluay Yüce, Charles R. Cowley
Publikováno v:
Research Notes of the AAS. 5:75
Engulfment of several bulk earthlike planets makes only a small effect on the stellar opacity for a sunlike star.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e289c4761fd2509b5e1b630d18d691a
https://doi.org/10.3847/2515-5172/abf497
https://doi.org/10.3847/2515-5172/abf497
Publikováno v:
The Astronomical Journal. 161:142
The literature on precision differential abundances (PDAs) in stars is extensive. Surveys include sun-like stars in the solar neighborhood, binary systems, and Galactic clusters. Numerous references as well as a discussion of relevant mechanisms may
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::824894be99e35f7ff31e885b7f3e6cbb
https://doi.org/10.3847/1538-3881/abdf5d
https://doi.org/10.3847/1538-3881/abdf5d
Publikováno v:
Research Notes of the AAS. 4:106
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e4525e807060f83a76cb41aad17ac04
https://doi.org/10.3847/2515-5172/aba3c3
https://doi.org/10.3847/2515-5172/aba3c3
The sharp-line spectrum of the Bp star HR 6000 has peculiarities that distinguish it from those of the HgMn stars with which it is sometimes associated. The position of the star close to the center of the Lupus 3 molecular cloud, whose estimated age
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12322bcfeae566305cd7154ac6b1781b
http://hdl.handle.net/20.500.11769/21799
http://hdl.handle.net/20.500.11769/21799