Results 91 to 100 of about 35,391 (195)

The ALCHEMI Atlas: Principal Component Analysis Reveals Starburst Evolution in NGC 253

open access: yesThe Astrophysical Journal Supplement Series
Molecular lines are powerful diagnostics of the physical and chemical properties of the interstellar medium (ISM). These ISM properties, which affect future star formation, are expected to differ in starburst galaxies from those of more quiescent ...
Nanase Harada   +26 more
doaj   +1 more source

5 cm OH Masers in Northern Star Formation Regions

open access: yesThe Astronomical Journal
We present a 6.0 GHz excited-state OH maser survey toward 155 northern star formation regions utilizing the Shanghai Tianma Radio Telescope. In total, we detect 44 6.0 GHz OH masers, 8 of which are new detections (one at 6016 MHz, two at 6030 MHz, and ...
Hai-Hua Qiao   +6 more
doaj   +1 more source

On the Interpretation of Mid-infrared Absorption Lines of Gas-phase H2O as Observed by JWST/MIRI

open access: yesThe Astrophysical Journal Supplement Series
Rovibrational absorption lines of H _2 O in the 5–8 μ m wavelength range selectively probe gas against the mid-infrared continuum-emitting background of the inner regions of young stellar objects and active galactic nuclei and deliver important ...
Jialu Li   +2 more
doaj   +1 more source

The Synchrotron-based Far-infrared Spectrum of Propargylamine

open access: yesThe Astrophysical Journal Supplement Series
Propargylamine (HC≡C–CH _2 –NH _2 ), with a triple bond and an amine group, is a nitrogen-bearing organic molecule of astrochemical interest due to its potential role as a precursor to aminoacetonitrile and other complex organic molecules in the ...
Tianhao Hu   +4 more
doaj   +1 more source

First Extragalactic Detection of Thermal Hydroxyl (OH) 18 cm Emission in M31 Reveals Abundant CO-faint Molecular Gas

open access: yesThe Astrophysical Journal
The most abundant interstellar molecule, molecular hydrogen (H _2 ), is practically invisible in cold molecular clouds. Astronomers typically use carbon monoxide (CO) to trace the bulk distribution and mass of H _2 in our galaxy and many others.
Michael P. Busch
doaj   +1 more source

Indirect observation of unobservable interstellar molecules [PDF]

open access: yes
It is suggested that the abundances of neutral non-polar interstellar molecules unobservable by radio astronomy can be systematically determined by radio observation of the protonated ions.
Green, S.   +3 more
core   +1 more source

Abiotic formation of nitrile precursors to amino acids and nucleobases in interstellar ice analogues. [PDF]

open access: yesChem Sci
Wang J   +8 more
europepmc   +1 more source

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