368 citations · 1.3k across the 44 of their papers we have counts for
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The messy death of a multiple star system and the resulting planetary nebula as observed by JWST
Orsola De Marco, Muhammad Akashi, Stavros Akras +66
Planetary nebulae (PNe), the ejected envelopes of red giant stars, provide us with a history of the last, mass-losing phases of 90 percent of stars initially more massive than the…
The [S II] Spectral Images of the Planetary Nebula NGC 7009: II. Major Axis
Siek Hyung, Seong-Jae Lee, Masaaki Otsuka
We derived position-velocity density distribution diagrams along the major (PA = 77) axis of the elliptical planetary nebula NGC 7009 with the Keck HIRES [SII] 6716/6731…
Time-Variable Jet Ejections from RW Aur A, RY Tau and DG Tau
Michihiro Takami, Hans Moritz Guenther, P. Christian Schneider +17
We present Gemini-NIFS, VLT-SINFONI and Keck-OSIRIS observations of near-infrared [Fe II] emission associated with the well-studied jets from three active T Tauri stars; RW Aur A,…
On the N/O abundance ratio and the progenitor mass for the most luminous planetary nebulae of M 31
Toshiya Ueta, Masaaki Otsuka
Plasma diagnostics are the bases of investigation into the physical and chemical properties of line-emitting gaseous systems. To perform plasma diagnostics properly, it is essentia…
Double Shells of the Planetary Nebula NGC 7009 Minor Axis
Seong-Jae Lee, Siek Hyung, Masaaki Otsuka
We analyzed the minor axis spectra of the elliptical planetary nebula (PN) NGC 7009 observed with the Keck HIRES with a 0.862 10 slit placed at about 7.5 an…
CO line observations of OH/IR stars in the inner Galactic Bulge: Characteristics of stars at the tip of the AGB
H. Olofsson, T. Khouri, B. A. Sargent +10
12CO and 13CO lines, as well as a mm-wave continuum, have been observed for a sample of 22 OH/IR stars in directions within 2 degrees of the Galactic Centre. Photometry data have b…