2015A&A...577A..79N

Query : 2015A&A...577A..79N

2015A&A...577A..79N - Astronomy and Astrophysics, volume 577A79-79 (2015/5-1)

The electronic spectra of protonated nitrogen-substituted polycyclic aromatic hydrocarbon molecules.

NOBLE J.A., DEDONDER C. and JOUVET C.

Abstract (from CDS):

This study was designed to examine the viability of protonated nitrogen-substituted polycyclic aromatic hydrocarbons (H⁺PANHs) as candidates for the carriers of the diffuse interstellar bands (DIBs). We obtained the electronic spectra of two protonated PANH cations, protonated acridine and phenanthridine, using parent ion photo-fragment spectroscopy and generated theoretical electronic spectra using ab initio calculations. We show that the spectra of the two species studied here do not correspond to known DIBs. However, based on the general properties derived from the spectra of these small protonated nitrogen-substituted PAHs, we propose that larger H⁺PANH cations represent good candidates for DIB carriers due to the expected positions of their electronic transitions in the UV-visible and their narrow spectral bands.

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Journal keyword(s): astrochemistry - molecular data - ultraviolet: ISM - ISM: molecules - methods: laboratory: molecular

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	NGC 7023	OpC	21 01 36.9	+68 09 48						~	739	0

Query : 2015A&A...577A..79N

Basic data :

NGC 7023 -- Open Cluster
Other object types:	`OpC (2022ApJS,OCISM,...)`, `Cl* (C,Cl,...)`, `IR (IRAS,PSCz,...)`, `V* (AAVSO)`, `HII (LBN)`, `RNe ([RK68])`, `ISM (GN)`, `UV ([SPB96])`
ICRS coord. (ep=J2000) :	`21 01 36.9 +68 09 48 (Optical) [ ] ~ ~`
FK4 coord. (ep=B1950 eq=1950) :	`21 00 59.7 +67 57 56 [ ]`
Gal coord. (ep=J2000) :	`104.0616 +14.1926 [ ]`
Proper motions mas/yr :	`7.815 -1.086 [0.562 0.553 90] C` `2022ApJS..262....7H`
Parallaxes (mas):	`2.905 [0.077] C` `2022ApJS..262....7H`

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`NGC 7023`	`IRAS F20599+6755`	`NAME IRIS Nebula`	`RAFGL 2695`
`C 2059+679`	`IRAS F21009+6758`	`OCISM 50`	`[BDB2003] G104.06+14.19`
`Cl VDB 139`	`IRAS 21009+6758`	`OCl 235`	`[RK68] 105`
`GN 21.01.0`	`LBN 104.08+14.21`	`PSCz P20599+6755`	`[SPB96] 2161`
`IRAS 20599+6755`	`LBN 487`	`PSCz P21009+6758`	`AAVSO 2044+67`

References (739 between 1850 and 2026) (Total 739)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NGC 7023

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`NGC 7023`	`IRAS 20599+6755`	`IRAS F20599+6755`	`IRAS F21009+6758`	`IRAS 21009+6758`
`RAFGL 2695`

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