Stable Nitrogen Isotope Analysis of Amino Acids by Orbitrap Mass Spectrometry: Application for Extraterrestrial Samples. [PDF]
Rapid Commun Mass SpectromABSTRACT Background Obtaining isotopic data on soluble organic compounds, such as amino acids, in extraterrestrial samples is crucial for understanding their origins, prebiotic chemistry, and potential contamination. Conventional GC‐IRMS requires grams of material to measure isotopic compositions, limiting the analysis of low‐concentration organics in ...
McIntosh OM +9 more
europepmc +2 more sources
Planetary Nebula Spectrograph survey of S0 galaxy kinematics – II. Clues to the origins of S0 galaxies [PDF]
, 2013 The stellar kinematics of the spheroids and discs of S0 galaxies contain clues to their formation histories. Unfortunately, it is difficult to disentangle the two components and to recover their stellar kinematics in the faint outer parts of the galaxies
A. Cortesi +13 more
openalex +3 more sources
SBS 1150+599A: an extremely oxygen-poor planetary nebula in the Galactic halo? [PDF]
, 2001 We report results of a spectrophotometric study of SBS 1150+599A and discuss the nature of this object based upon our data. Our study shows that SBS 1150+599A is most probably a planetary nebula located in the Galactic halo and not a cataclysmic variable
Aguilar +59 more
core +2 more sources
A Preferred Orientation Angle for Bipolar Planetary Nebulae
Galaxies, 2020 We present preliminary results from measuring Galactic orientation angles of 766 elliptical and bipolar Planetary Nebulae (PNe) in the Hong Kong/Australian Astronomical Observatory/Strasbourg Observatory H-alpha Planetary Nebula research platform and ...
Andreas Ritter, Quentin A. Parker
doaj +1 more source
HASH: the Hong Kong/AAO/Strasbourg Hα planetary nebula database [PDF]
, 2016 By incorporating our major recent discoveries with re-measured and verified contents of existing catalogues we provide, for the first time, an accessible, reliable, on-line SQL database for essential, up-to date information for all known Galactic ...
Q. Parker, I. Bojičić, D. Frew
semanticscholar +1 more source
OBSERVATIONAL CONFIRMATION OF A LINK BETWEEN COMMON ENVELOPE BINARY INTERACTION AND PLANETARY NEBULA SHAPING [PDF]
, 2016 A current issue in the study of planetary nebulae with close binary central stars (CSs) is the extent to which the binaries affect the shaping of the nebulae.
T. Hillwig +5 more
semanticscholar +1 more source
The double-degenerate, super-Chandrasekhar nucleus of the planetary nebula Henize 2-428 [PDF]
Nature, 2015 The planetary nebula stage is the ultimate fate of stars with masses one to eight times that of the Sun (). The origin of their complex morphologies is poorly understood, although several mechanisms involving binary interaction have been proposed.
M. Santander-García +10 more
semanticscholar +1 more source
The Real-Time Evolution of V4334 Sgr
Galaxies, 2018 V4334 Sgr (Sakurai’s object) is an enigmatic evolved star that underwent a very late thermal pulse a few years before its discovery in 1996. It ejected a new hydrogen-deficient nebula in the process. The source has been observed continuously since,
Peter A. M. van Hoof +7 more
doaj +1 more source
IMAGING THE ELUSIVE H-POOR GAS IN THE HIGH adf PLANETARY NEBULA NGC 6778 [PDF]
, 2016 We present the first direct image of the high-metallicity gas component in a planetary nebula (NGC 6778), taken with the OSIRIS Blue Tunable Filter centered on the O ii λ4649+50 Å optical recombination lines (ORLs) at the 10.4 m Gran Telescopio Canarias.
J. García-Rojas +5 more
semanticscholar +1 more source
A REVISED PLANETARY NEBULA LUMINOSITY FUNCTION DISTANCE TO NGC 628 USING MUSE [PDF]
, 2016 Distance uncertainties plague our understanding of the physical scales relevant to the physics of star formation in extragalactic studies. The planetary nebulae luminosity function (PNLF) is one of very few techniques that can provide distance estimates ...
K. Kreckel +9 more
semanticscholar +1 more source