Herschel Planetary Nebula Survey (HerPlaNS): hydrogen recombination laser lines in Mz 3
| Autor: | E. Mendoza, Alexander G. G. M. Tielens, Zulema Abraham, Masaaki Otsuka, K. Exter, M. L. Leal-Ferreira, Rodolfo Montez, J. Lepine, Albert A. Zijlstra, Samuel Walton, Eva Villaver, Pedro P. B. Beaklini, Peter A. M. van Hoof, Isabel Aleman, Toshiya Ueta |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
FOS: Physical sciences Astronomy and Astrophysics Bipolar nebula Astrophysics Plasma Laser Astrophysics - Astrophysics of Galaxies 01 natural sciences Planetary nebula law.invention 010309 optics Spire 13. Climate action Space and Planetary Science law Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences MEIO INTERESTELAR Spontaneous emission Maser 010303 astronomy & astrophysics Line (formation) |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 477(4), 4499-4510 Aleman, I, Exter, K, Ueta, T, Walton, S, Tielens, A G G M, Zijlstra, A, Montez, R, Abraham, Z, Otsuka, M, Beaklini, P P B, van Hoof, P A M, Villaver, E, Leal-Ferreira, M L, Mendoza, E & Lepine, J D R 2018, ' Herschel Planetary Nebula Survey (HerPlaNS): Hydrogen Recombination Laser Lines in Mz 3 ', Royal Astronomical Society. Monthly Notices, vol. 477, no. 4, pp. 4499-4510 . https://doi.org/10.1093/mnras/sty966 |
| DOI: | 10.1093/mnras/sty966 |
| Popis: | The bipolar nebula Menzel 3 (Mz 3) was observed as part of the \textit{Herschel} Planetary Nebula Survey (\textit{HerPlaNS}), which used the PACS and SPIRE instruments aboard the \textit{Herschel Space Observatory} to study a sample of planetary nebulae (PNe). In this paper, one of the series describing \textit{HerPlaNS} results, we report the detection of H I recombination lines (HRLs) in the spectrum of Mz 3. Inspection of the spectrum reveals the presence of 12 HRLs in the 55 to 680 $\mu$m range covered by the PACS and SPIRE instruments (H11$\alpha$ to H21$\alpha$ and H14$\beta$). The presence of HRLs in this range is unusual for PNe and has not been reported in Mz 3 before. Our analysis indicates that the HRLs we observed are enhanced by laser effect occurring in the core of Mz 3. Our arguments for this are: (i) the available Mz 3 optical to submillimetre HRL $\alpha$ line intensity ratios are not well reproduced by the spontaneous emission of optically thin ionized gas, as would be typical for nebular gas in PNe; (ii) the compact core of Mz 3 is responsible for a large fraction of the Herschel HRLs emission; (iii) the line intensity ratios for Mz 3 are very similar to those in the core emission of the well known star MWC 349A, where laser effect is responsible for the enhancement of HRLs in the Herschel wavelength range; (iv) the physical characteristics relevant to cause laser effect in the core of MWC 349A are very similar to those in the core of Mz 3. Comment: Published in MNRAS. ESA Portal Story. 13 Pages, 7 figures |
| Databáze: | OpenAIRE |
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