| 1. |
- Baan, Willem A., et al.
(author)
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Dense Molecular Gas in Luminous Infrared Galaxies: Diagnosing the ISM
- 2008
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In: EAS Publications Series. - : EAS, EDP Sciences. - 1633-4760 .- 1638-1963. ; 31, s. 111-114
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Journal article (peer-reviewed)abstract
- The behavior of molecular tracers of the high-density star-forming ISM provides a diagnostics tool for luminous FIR galaxies. All molecules react differently to the physical and chemical environment and their collective behavior is indicative of the excitation of the ISM and its evolutionary state. This paper describes efforts to diagnose the nuclear medium through multiple-molecule studies.
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| 2. |
- Edgar, Brian, 1945-, et al.
(author)
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The new potential for the Weyl tensor in n dimensions : wave equation and gauge
- 2008
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In: Spanish Relativity Meeting 2007,2007. - Spain : EDR. ; , s. 245-248
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Conference paper (peer-reviewed)abstract
- Although the Lanczos potential (a (2,1) form, L) for the Weyl tensor does not exist in dimensions greater than four, a new potential (a (2,3) form, P, which coincides with the double dual of L in four dimensions) has recently been shown to exist in all dimensions. In this talk we discuss the structure of its wave equation which is obtained from the Bianchi identities, and the related question of gauge.
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| 3. |
- Loenen, A. F., et al.
(author)
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Extragalactic Chemistry: HCN, HNC, and HCO+ : M. , W. A. Baan, and R.
- 2008
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In: EAS Publications Series. - : EAS, EDP Sciences. - 1633-4760 .- 1638-1963. ; 31, s. 183-185
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Journal article (peer-reviewed)abstract
- High- and low-density tracer molecules have been observed in (Ultra-) Luminous Infrared Galaxies in order to initiate multi-molecule multi-transition studies to evaluate the physical and chemical environment of the nuclear medium and the ongoing nuclear activity. The data, augmented with data available in the literature, are presented in Baan et al. (2007), which also presents a first order analysis. Here, we present the chemical analysis of the J=1–0 transition lines of HCN, HNC, and HCO+.
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| 4. |
- Pérez-Beaupuits, J.P., et al.
(author)
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HNC and HCN in Seyfert Galaxies
- 2008
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In: EAS Publications Series. - : EDP Sciences. - 1633-4760 .- 1638-1963. ; 31, s. 195-196
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Conference paper (peer-reviewed)abstract
- What are the physical conditions in the nuclear region of Seyfert galaxies? Can we asses the predominant nuclear source of power starburst or AGN by using high density gas tracers? We have used SEST, JCMT, and IRAM 30 m telescopes to observe the J=1-0, J=3-2, and J=4-3 transition lines of HNC and HCN in the Seyfert 2 galaxies NGC 1068 and NGC 3079. We model the excitatioon conditions of these molecules based on the observed 3–2/1–0 line intensity ratios. In these proceedings we show the line ratios and discuss the excitation conditions modeled. We summarize our results and conclusions as follows: in NGC 1068, the emission of HNC emerges from lower (<10^5 {cm-3}) density gas than HCN (>10^5 {cm-3}). Instead, the emission of HNC and HCN emerges from the same gas in NGC 3079. The observed HCN/HNC line ratios favor a PDR scenario rather than an XDR one. However, the N(HNC)/N(HCN) column density ratios obtained for NGC 3079 can be found only in XDR environments.
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| 5. |
- Pidokrajt, Narit, 1979-, et al.
(author)
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On Geometro-thermodynamics of dilaton black holes
- 2008
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In: EAS Publications Series. - France : EDP Sciences 2008. - 1638-1963. ; 30, s. 279-283
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Journal article (peer-reviewed)abstract
- In this talk we present the latest results from our ongoing project on geometro-thermodynamics (also known as information geometry of thermodynamics or Ruppeiner geometry) of dilaton BHs in 4D in both Einstein and string frames and a dyonic dilaton BH and at the end we report very briefly results from this approach to the 2D dilaton BHs.
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