activity
19992024
most citedThe Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey

1.5k citations · 2.2k across the 26 of their papers we have counts for

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astro-ph2004★ 42 cited

Fine structure of the chromospheric activity in Solar-type stars - The Halpha Line

W. Lyra, G. F. Porto de Mello

A calibration of H-alpha as both a chromospheric diagnostic and an age indicator is presented, complementing the works previously done on this subject (Herbig 1985, Pasquini & Pall…

astro-ph1999★ 39 cited

Copper and Barium Abundances in the Ursa Major Moving Group

S. Castro, G. F. Porto de Mello, L. da Silva

We present Cu and Ba abundances for 7 G-K dwarf stars, members of the solar-metallicity, 0.3 Gyr old Ursa Major Moving Group. All analyzed member stars show [Ba/Fe] excesses of +0.…