2008A&A...485..735P


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST23:06:42

2008A&A...485..735P - Astronomy and Astrophysics, volume 485, 735-742 (2008/7-3)

Modeling the interstellar aromatic infrared bands with co-added spectra of PAHs.

PATHAK A. and RASTOGI S.

Abstract (from CDS):

The observed variations in profiles of the interstellar aromatic infrared bands correlate with the object type and are indicative of PAH populations existing in different sources. Spectroscopic studies of PAHs can provide tools for interpreting the variations accompanying the AIBs. As the observed spectra results from a mix of possible species in the region, we try to model this composite spectra by co-adding emissions from PAHs in different size groups. Theoretical IR data of PAHs having 10 to 96 carbon atoms is used to obtain emission spectra. The models are taken in size groups made up of small, medium, and large PAHs. The models show a good profile match with observations for the 7.7µm complex having sub-features at 7.6 and 7.8µm. The 7.6µm sub-feature dominates in the spectra of medium-sized PAH cations, matching observations from UV-rich interstellar environments. The 7.8µm component is more intense in the spectra of large PAH cations (model III), correlating with observations from benign astrophysical regions. A possible interpretation of the observations of C-H out-of-plane bend modes and the weak outliers on the blue side of the intense 11.2µm band is proposed. The models provide pointers to possible PAH populations in different regions.

Abstract Copyright:

Journal keyword(s): molecular data - ISM: molecules - infrared: general - infrared: ISM

Simbad objects: 7

goto Full paper

goto View the reference in ADS

Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Orion Peak 2 PoC 05 35 15.74 -05 22 39.9           ~ 20 0
2 * tet01 Ori C ** 05 35 16.46375 -05 23 22.8486 4.20 5.15 5.13 4.91 4.73 O7Vp 1272 1
3 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 570 1
4 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 715 0
5 CPD-56 8032 PN 17 09 00.86008 -56 54 48.0957 11.24 11.48 11.04     [WC10] 248 0
6 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2323 1
7 SH 2-159 Y*O 23 15 31.27440 +61 07 10.4450           ~ 175 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2008A&A...485..735P and select 'bookmark this link' or equivalent in the popup menu


2020.07.13-23:06:42

© Université de Strasbourg/CNRS

    • Contact