Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Boesgaard, Ann M."'
The low [alpha/Fe] ratio in the metal-poor ([Fe/H]= -1.50) common proper motion pair HD 134439 and HD 134440 has been variously attributed to chemical evolution in an extragalactic environment with an irregular star formation history, planetessimal a
Externí odkaz:
http://arxiv.org/abs/1410.8646
Recent reanalyses of HIPPARCOS parallax data confirm a previously noted discrepancy with the Pleiades distance modulus estimated from main-sequence fitting in the color-magnitude diagram. One proposed explanation of this distance modulus discrepancy
Externí odkaz:
http://arxiv.org/abs/1309.1540
Autor:
Bubar, Eric J., King, Jeremy R., Soderblom, David R., Deliyannis, Constantine P., Boesgaard, Ann M.
Publikováno v:
Astron.J.134:2328-2339,2007
We use high-signal-to-noise ($\sim$150-450), high resolution ($R{\sim}45,000$) Keck HIRES spectroscopy of 13 candidate post T Tauri stars to derive basic physical parameters, lithium abundances and radial velocities. We place our stars in the M$_v$-T
Externí odkaz:
http://arxiv.org/abs/0708.3089
We use high S/N, high-resolution Keck/HIRES spectroscopy of 4 solar twin candidates (HIP 71813, 76114, 77718, 78399) from our Hipparcos-based CaII H & K survey to carry out parameter and abundance analyses of these objects. Our spectroscopic Teff est
Externí odkaz:
http://arxiv.org/abs/astro-ph/0508004
Publikováno v:
In Nuclear Physics, Section A 2005 758:300-303
Autor:
Novicki, Megan C., Boesgaard, Ann M.
Publikováno v:
Proceedings of the International Astronomical Union. 05/03/2005, Vol. 1 Issue S228, p103-106. 4p.
Autor:
BOESGAARD, ANN M., FESEN, ROBERT A.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1974 Feb 01. 86(509), 76-77.
Externí odkaz:
https://www.jstor.org/stable/40675499
Autor:
BOESGAARD, ANN M.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1969 Jun 01. 81(480), 283-285.
Externí odkaz:
https://www.jstor.org/stable/40674732
Autor:
BOESGAARD, ANN M.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1969 Aug 01. 81(481), 365-373.
Externí odkaz:
https://www.jstor.org/stable/40674746
Publikováno v:
Proceedings of SPIE; Nov2000 Part 2, Issue 1, p274-284, 11p