94 citations · 145 across the 8 of their papers we have counts for
8 papers
Excitation mechanisms of C II optical permitted lines in ionized nebulae
E. Reyes-Rodríguez, J. E. Méndez-Delgado, J. García-Rojas +4
Context. Carbon is the fourth most abundant element in the universe and its distribution is critical to understanding stellar evolution and nucleosynthesis. In optical studies of i…
Constraining Protoplanetary Disk Winds from Forbidden Line Profiles with Simulation-based Inference
Ahmad Nemer, ChangHoon Hahn, Jiaxuan Li +2
Protoplanetary disks are the sites of vigorous hydrodynamic processes, such as accretion and outflows, and ultimately establish the conditions for the formation of planets. The pro…
Photoevaporation from Inner Protoplanetary Disks Confronted with Observations
Yiren Lin, Lile Wang, Min Fang +2
The decades-long explorations on the dispersal of protoplanetary disks involve many debates about photoevaporation versus magnetized wind launching mechanisms. This letter argues t…
Line profiles of forbidden emission lines and what they can tell us about protoplanetary disk winds
Ahmad Nemer, Jeremy Goodman
Emission in forbidden lines of oxygen, neon, and other species are commonly used to trace winds from protoplanetary disks. Using Cloudy, we calculate such emission for parametrized…
High-resolution [O I] line spectral mapping of TW Hya supportive of a magnetothermal wind
Min Fang, Lile Wang, Gregory J. Herczeg +6
Disk winds are thought to play a critical role in the evolution and dispersal of protoplanetary disks. A primary diagnostic of this physics is emission from the wind, especially in…
Solar oxygen abundance
Maria Bergemann, Richard Hoppe, Ekaterina Semenova +10
Motivated by the controversy over the surface metallicity of the Sun, we present a re-analysis of the solar photospheric oxygen (O) abundance. New atomic models of O and Ni are use…
The role of FUV Pumping in exciting the [Oi] lines in Protostellar Disks and Winds
Ahmad Nemer, Jeremy Goodman, Lile Wang
We use Cloudy to re-examine excitation of [Oi] 6300 A and [Oi] 5577 A in the X-ray driven photo-evaporative wind models of Owen and collaborators, and in more recent magnetothermal…
First evidence of enhanced recombination in astrophysical environments and the implications for plasma diagnostics
A. Nemer, N. C. Sterling, J. Raymond +6
We report the first unambiguous observational evidence of Rydberg Enhanced Recombination (RER), a potentially important recombination mechanism that has hitherto been unexplored in…