65 citations · 94 across the 3 of their papers we have counts for
3 papers · 1 filter
Extreme broad He\2 emission at high and low redshifts: the dominant role of VMS in NGC 3125-A1 and CDFS131717
Aida Wofford, Andrés Sixtos, Stephane Charlot +6
Super star cluster (SSC) A1 (3.1E5 Msun) in NGC 3125 has one of the strongest (EW = 4.6 +/- 0.5 Ang) broad (FWHM = 1131 +\- 40 km/s) He II 1640 emission lines in the nearby Univers…
Looking for nebular He II emission south of the multiple-massive star system, HD 5980
Andres Sixtos, Aida Wofford, Andreas A. C. Sanders +1
The nebular He II λ1640 emission line is observed in star forming galaxies out to large distances and can be used to constrain the properties of sources of He+ ionizing photons. Fo…
Determination of the primordial helium abundance based on NGC 346 an HII region of the Small Magellanic Cloud
Mabel Valerdi, Antonio Peimbert, Manuel Peimbert +1
To place meaningful constraints on Big Bang Nucleosynthesis models, the primordial helium abundance determination is crucial. Low-metallicity HII regions have been used to estimate…