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Metallicities and dust content of proximate damped Lyman alpha systems in the Sloan Digital Sky Survey
Metallicities dust content proximate damped Lyman alpha systems
2011/1/11
Composite spectra of 85 proximate absorbers (log N(HI)>20 and velocity difference between the absorption and emission redshift, dv<10,000 km/s) in the SDSS are used to investigate the trends of metal ...
The HETDEX Pilot Survey III: The Low Metallicities of High-Redshift Lyman Alpha Galaxies
galaxies evolution
2010/11/9
We present the results of Keck/NIRSPEC spectroscopic observations of three Ly emitting galaxies (LAEs)at z∼ 2.3 discoveredwith the HETDEX pilot survey. We detectH , [O III], and H emission fro...
Metallicities of galaxies in the nearby Lynx-Cancer void
Metallicities of galaxies nearby Lynx-Cancer void
2010/11/16
Does the void environment have a sizable effect on the evolution of dwarf galaxies? If yes, the best probes should be the most fragile least massive dwarfs.We compiled a sample of about one hundred dw...
Metallicities of Young Open Clusters I: NGC 7160 and NGC 2232
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/24
We present a moderate-resolution spectroscopic analysis of the 10-25 Myr clusters NGC 7160 and NGC 2232, using observations obtained with the WIYN 3.5-m telescope. Both NGC 7160 and NGC 2232 are found...
Gravities and metallicities of stars with protoplanetary disks
stars Gravities metallicities protoplanetary disks
2009/7/1
Gravities and metallicities of stars with protoplanetary disks。
Radial gradients and metallicities in the galactic disk
Radial gradients metallicities galactic disk
2009/6/11
Radial gradients and metallicities in the galactic disk。
Comparison of Metallicities Adopted for the Synthetic UBV Photometry with Those Evaluated by Means of RGU Photometry
Metallicities Adopted Synthetic UBV Photometry RGU Photometry
2010/4/19
Comparison of metallicities adopted for synthetic UBV photometry with those evaluated by means of RGU photometry for 92 stars is presented. The agreement is only for zero metallicity. The discrepancy ...