H_2O Maser Emission from FU Orionis and Herbig Ae/Be Stars

H_3(+) Emission in the Ejecta of SN 1987A

H_alpha in HII regions of Holmberg IX (Arbutina+, 2009)

Hα Full Disk Observations of Chromospheric Differential Rotation

Hα +[NII] kinematics of Radio-Loud Ellipticals

Hα , EUV, and Microwave Observations of a Large Flare as Evidence for Spontaneous Magnetic Reconnection

Hα and H-Beta Emission in the ALGOLS SW CYG, TZ ERI and SS CET

Hα chromospheric observations of the Venus transit on June 8, 2004

Hα Emission Stars in the Circinus Region

Hα emission stars toward Bulge (Kohoutek+, 2003)

Hα imaging of X-ray sources in selected globular clusters with SOAR

Hα line profile variability in the B8Ia-type supergiant Rigel (β Ori)

Hα Spectral Properties of Velocity Threads Constituting a Quiescent Solar Filament

Hα Spectroscopy of the Unusual Binary V Sagittae

Hα-FUV Flux Ratios of Local Volume Galaxies: Effects of Systematic Biases on Upper IMF Constraints