JOURNAL ARTICLE

Detection of polycyclic aromatic hydrocarbons on a sample of comets.

  • Published In: Journal of Astrophysics & Astronomy, 2023, v. 44, n. 2. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Venkataraman, V.; Roy, Arijit; Ramachandran, R.; Quitián-Lara, H. M.; Hill, H.; RajaSekhar, B. N.; Bhardwaj, Anil; Mason, N. J.; Sivaraman, B. 3 of 3

Abstract

We present the spectral properties of a selection of comets from both the Jupiter family and Oort cloud in the ultraviolet (UV) and mid-infrared (IR) wavelength regions. Spectroscopic measurements are retrieved from public archival data of the International Ultraviolet Explorer (IUE) and Hubble Space Observatory (HST) in the near-UV (NUV) and far-UV (FUV) wavelengths and reveal emissions from Polycyclic Aromatic Hydrocarbon (PAH) molecules, such as pentacene (C 22 H 14 ) at 1902, 2795 Å and toluene (C 7 H 8 ) at 2681 Å. UV spectra of the comets also show emissions due to CS, Fe II, CO Cameron bands, C I, S I and O I. Mid-IR spectroscopic observations made using the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope for a few comets reveal the presence of PAH bands at 6.2, 7.7, 8.6, 11.2 μ m. Mid-IR spectra of the comets also reveal the presence of silicate at 9.7 μ m. The similarity of PAH signatures observed in the proto-planetary disks of young stellar objects, meteorites, interplanetary dust particles and comets with those observed in the interstellar medium (ISM) suggests a possible scenario for the incorporation of PAH from ISM into the primordial solar nebula. [ABSTRACT FROM AUTHOR]

Additional Information

  • Source:Journal of Astrophysics & Astronomy. 2023/10, Vol. 44, Issue 2, p1
  • Document Type:Article
  • Subject Area:History
  • Publication Date:2023
  • ISSN:0250-6335
  • DOI:10.1007/s12036-023-09977-1
  • Accession Number:173470958
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