scholarly journals Polycyclic Aromatic Hydrocarbons as a Tracer of Star Formation?

2004 ◽  
Vol 613 (2) ◽  
pp. 986-1003 ◽  
Author(s):  
E. Peeters ◽  
H. W. W. Spoon ◽  
A. G. G. M. Tielens
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Star Formation ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

Star formation and polycyclic aromatic hydrocarbons in ELAIS N1 galaxies as seen by AKARI

2019 ◽  
Vol 71 (2) ◽  
Author(s):  
Tímea O Kovács ◽  
Denis Burgarella ◽  
Hidehiro Kaneda ◽  
Dániel Cs Molnár ◽  
Shinki Oyabu ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Star Formation ◽  
Aromatic Hydrocarbons ◽  
Main Sequence ◽  
Compact Star ◽  
Formation Rate ◽  
Spectral Energy ◽  
Star Forming ◽  
Star Forming Regions ◽  
Polycyclic Aromatic

Abstract We have examined the relationship between star formation and polycyclic aromatic hydrocarbons (PAHs) in a variety of galaxies. PAHs are excited by the ultraviolet photons of young stars, but they are disassociated by strong UV radiation in starbursts. Therefore their emission (which is in the wavelength range covered by AKARI) can be used as a star formation tracer in main sequence galaxies. We selected our targets in the ELAIS N1 field with AKARI detections, matched them with the Herschel Point Source Catalog, and collected other publicly available photometric data. Their spectral energy distributions (SEDs) were fitted, and several parameters of the galaxies were estimated, e.g., star formation rate (SFR), stellar mass, and the fraction of PAHs compared to dust mass (qPAH), and we examined the relationships between these parameters. The final sample consisted of 48 galaxies, with redshifts from 0.04 to 2.36. The estimated qPAH values were lower on average than typical values in the literature. This could be due to various reasons, such as low metallicity, or ongoing active galactic nucleus or starburst activity. Of our sample, 83% of the objects fell in the star-forming main sequence of galaxies, while only 8% could be considered as starbursts. We found a decreasing qPAH trend with increasing AV and consequently LIR, suggesting the possible presence of compact star-forming regions. We compared the qPAH values with the known relations of the PAH luminosities, but they did not always follow the same trends (SFR, LIR), and showed only slight correlation with the PAH luminosities.

scholarly journals POLYCYCLIC AROMATIC HYDROCARBONS IN GALAXIES ATz∼ 0.1: THE EFFECT OF STAR FORMATION AND ACTIVE GALACTIC NUCLEI

2009 ◽  
Vol 705 (1) ◽  
pp. 885-898 ◽  
Author(s):  
Matthew J. O'Dowd ◽  
David Schiminovich ◽  
Benjamin D. Johnson ◽  
Marie A. Treyer ◽  
Christopher D. Martin ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Star Formation ◽  
Active Galactic Nuclei ◽  
Aromatic Hydrocarbons ◽  
Galactic Nuclei ◽  
Polycyclic Aromatic

scholarly journals IR ring nebulae in the Milky Way and M33 galaxies

2021 ◽  
Author(s):  
A. P. Topchieva ◽  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Star Formation ◽  
Aromatic Hydrocarbons ◽  
Milky Way ◽  
Massive Stars ◽  
Theoretical Data ◽  
Star Forming ◽  
The Galaxy ◽  
Polycyclic Aromatic ◽  
Ring Nebulae

Studying the formation of massive stars in our Galaxy and in other galaxies is one of the possibilities to connect the information obtained for the regions of star formation in general. This study presents statistical and theoretical data on infrared ring nebulae (IRRN) in our Galaxy and the galaxy M33, which is located not far from us and in the plane of sky, which is convenient for selecting individual objects. In this paper, comparisons of fluxes for 258 star-forming complexes in M33, extragalactic of star formation complexes, and for IRRN in our Galaxy are shown. A theoretical calculation of the distribution of polycyclic aromatic hydrocarbons using DustEM has been carried out.

The Assessment of Contamination and Source of Polycyclic Aromatic Hydrocarbons from the Sediments of the Someş River

2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic
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