Results 131 to 140 of about 2,145,468 (291)

On the Origin of Infrared Bands Attributed to Tryptophan in Spitzer Observations of IC 348

open access: yesThe Astrophysical Journal Letters
Infrared emission features toward interstellar gas of the IC 348 star cluster in Perseus have been recently proposed to originate from the amino acid tryptophan.
Aditya Dhariwal   +14 more
doaj   +1 more source

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

Boundary conditions for the paleoenvironment: Chemical and physical processes in the pre-solar nebula [PDF]

open access: yes
Detailed study of the first interstellar hydrocarbon ring, cyclopropenylidene (C3H2), is continuing. The singly deuterated isotope of this molecule, C3HD, was observed in several cold interstellar clouds.
Irvine, William M., Schloerb, F. Peter
core   +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

The Formation of Molecules in Contracting Interstellar Clouds [PDF]

open access: bronze, 1976
H. Suzuki   +4 more
openalex   +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

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