197 citations · 2.4k across the 71 of their papers we have counts for
4 papers · 1 filter
Characterizing the Chemically-Enriched Circumgalactic Medium of ~38000 Luminous Red Galaxies in SDSS DR12
Yun-Hsin Huang, Hsiao-Wen Chen, Sean D. Johnson +1
We report a definitive detection of chemically-enriched cool gas around massive, quiescent galaxies at z~0.4-0.7. The result is based on a survey of 37621 luminous red galaxy (LRG)…
Magellan LDSS3 emission confirmation of galaxies hosting metal-rich Lyman-alpha absorption systems
Lorrie A. Straka, Sean D. Johnson, Donald G. York +5
Using the Low Dispersion Survey Spectrograph 3 at the Magellan II Clay Telescope, we target {candidate absorption host galaxies} detected in deep optical imaging {(reaching limitin…
On the origin of excess cool gas in quasar host halos
Sean D. Johnson, Hsiao-Wen Chen, John S. Mulchaey
Previous observations of quasar host halos at z=2 have uncovered large quantities of cool gas that exceed what is found around inactive galaxies of both lower and higher masses. To…
On the possible environmental effect in distributing heavy elements beyond individual gaseous halos
Sean D. Johnson, Hsiao-Wen Chen, John S. Mulchaey
We present a study of extended galaxy halo gas through HI and OVI absorption over two decades in projected distance at . The study is based on a sample of galaxie…