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View article: Relativistic Atomic Structure of Au IV and the Os Isoelectronic Sequence: Opacity Data for Kilonova Ejecta
Relativistic Atomic Structure of Au IV and the Os Isoelectronic Sequence: Opacity Data for Kilonova Ejecta Open
Direct detection of gravitational waves (GWs) on 17 August 2017, propagating from a binary neutron star merger, or a “kilonova”, opened the era of multimessenger astronomy. The ejected material from neutron star mergers, or “kilonova”, is …
View article: Properties of Highly Rotationally Excited H<sub>2</sub> in Photodissociation Regions
Properties of Highly Rotationally Excited H<sub>2</sub> in Photodissociation Regions Open
Molecular hydrogen (H 2 ) is the dominant molecular species in the vast majority of interstellar environments and it plays a crucial role as a radiative coolant. In photodissociation regions (PDRs), it is one of the primary emitters in the…
View article: Fine-structure Excitation of Ne<sup>+</sup> in Collision with Atomic Hydrogen
Fine-structure Excitation of Ne<sup>+</sup> in Collision with Atomic Hydrogen Open
Fine-structure line emission from [Ne ii ] is observed in the infrared (12.81 μ m) and could serve as a diagnostic of X-ray irradiation in protoplanetary disks. [Ne ii ] emission may also trace the disk gas and indicate the presence of sho…
View article: Rotational quenching of HD induced by collisions with H2 molecules
Rotational quenching of HD induced by collisions with H2 molecules Open
Rate coefficients for rotational transitions in HD induced by H2 impact for rotational levels of HD j ≤ 8 and temperatures 10 K ≤ T ≤ 5000 K are reported. The quantum mechanical close-coupling (CC) method and the coupled-states (CS) decoup…
View article: Electron-impact fine-structure excitation of Fe ii at low temperature
Electron-impact fine-structure excitation of Fe ii at low temperature Open
Fe ii emission lines are observed from nearly all classes of astronomical objects over a wide spectral range from the infrared to the ultraviolet. To meaningfully interpret these lines, reliable atomic data are necessary. In the work prese…
View article: Collisional Quenching of Highly Excited H<sub>2</sub> due to H<sub>2</sub> Collisions
Collisional Quenching of Highly Excited H<sub>2</sub> due to H<sub>2</sub> Collisions Open
Rate coefficients for pure rotational quenching in H 2 ( ν 1 = 0, j 1 ) + H 2 ( ν 2 = 0, j 2 ) collisions from initial levels of j 1 = 2–31 ( j 2 = 0 or 1) to all lower rotational levels are presented. We carried out extensive quantum mech…