G31.41+0.31 Archives

Continuum emission image of G31.41+0.31 at a frequency 99.915 GHz (3.02 mm). The blue circle represents the synthesized beam size of 1.30′′× 1.02′′. The contour levels begin at 3σ (σ = 3.36 mJy, the root mean square of the background of the continuum emission image) and increase by the factor of √ 2. -- astro-ph.GA

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Status Report

Detection And Chemical Modelling Of Complex Prebiotic Molecule Cyanamide In The Hot Molecular Core G31.41+0.31

by Keith CowingJanuary 25, 2024January 24, 2024

In the interstellar medium (ISM), the complex prebiotic molecule cyanamide (NH2CN) plays a key role in producing adenine (C5H5N5), purines (C5H4N4), pyrimidines (C4H4N2), and other biomolecules via a series of […]

Emission of SO, SiS, and SO2 integrated in velocity. Upper panels: velocity-integrated emission of, from left to right, SO N = 3 − 2, N = 2 − 1(2), N = 2 − 1(3), and N = 4 − 4 (see Table 1 for the spectral parameters). The integration velocity range is 85.7–105.8 km s−1 in all images to match the velocity interval where the PN emission is detected. The black contours start from the 3σ rms level of the integrated maps, which is, from left to right: 4.8 × 10−2 Jy beam−1 km s−1 ; 2.5 × 10−2 Jy beam−1 km s−1 ; 3.6 × 10−2 Jy beam−1 km s−1 ; 2.7 × 10−2 Jy beam−1 km s−1 , and the step is of 10σ rms. The white contour corresponds to the PN integrated emission, and the numbered regions "1" and "2" are those defined in Fig. 1. The synthesised beam is illustrated in the lower-left corner. To the right of the quantum numbers, we indicate the Eup of the transition. Lower panels: same as the upper panels for the SiS J = 5 − 4 and J = 6 − 5 lines, and the SO2 JKa,Kb = 31,3 − 20,2 and JKa,Kb = 101,9 − 100,10 lines. The 3σ rms level is: 2.9 × 10−2 Jy beam−1 km s−1 for SiS J = 5 − 4; 2.3 × 10−2 Jy beam−1 km s−1 for SiS J = 6 − 5; 2.95 × 10−3 Jy beam−1 km s−1 for SO2 JKa,Kb = 31,3 − 30,2; 1 × 10−2 Jy beam−1 km s−1 for SO2 JKa,Kb = 101,9 − 100,10. -- astro-ph.GA

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Status Report

The GUAPOS Project: G31.41+0.31 Unbiased ALMA Spectral Observational Survey. IV. Phosphorus-bearing Molecules And Their Relation With Shock Tracers

by Keith CowingNovember 24, 2023November 24, 2023

The astrochemistry of the important biogenic element phosphorus (P) is still poorly understood, but observational evidence indicates that P-bearing molecules are likely associated with shocks.