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Sökning: onr:"swepub:oai:research.chalmers.se:d4f94359-0d10-4d49-81df-1ccff45408c6" > Probing highly obsc...

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FältnamnIndikatorerMetadata
00005199naa a2200589 4500
001oai:research.chalmers.se:d4f94359-0d10-4d49-81df-1ccff45408c6
003SwePub
008171007s2015 | |||||||||||000 ||eng|
0247 a https://doi.org/10.1051/0004-6361/2015264102 DOI
0247 a https://research.chalmers.se/publication/2310552 URI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Aalto, Susanne,d 1964u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)saalto
2451 0a Probing highly obscured, self-absorbed galaxy nuclei with vibrationally excited HCN
264 c 2015-11-18
264 1b EDP Sciences,c 2015
338 a electronic2 rdacarrier
520 a We present high resolution (0.'' 4) IRAM PdBI and ALMA mm and submm observations of the (ultra) luminous infrared galaxies ((U)LIRGs) IRAS 17208-0014, Arp220, IC 860 and Zw049.057 that reveal intense line emission from vibrationally excited (nu(2) = 1) J = 3-2 and 4-3 HCN. The emission is emerging from buried, compact (r 5 x 10(13) L-circle dot kpc(-2). These nuclei are likely powered by accreting supermassive black holes (SMBHs) and/or hot (>200 K) extreme starbursts. Vibrational, nu(2) = 1, lines of HCN are excited by intense 14 mu m mid-infrared emission and are excellent probes of the dynamics, masses, and physical conditions of (U)LIRG nuclei when H-2 column densities exceed 10(24) cm(-2). It is clear that these lines open up a new interesting avenue to gain access to the most obscured AGNs and starbursts. Vibrationally excited HCN acts as a proxy for the absorbed mid-infrared emission from the embedded nuclei, which allows for reconstruction of the intrinsic, hotter dust SED. In contrast, we show strong evidence that the ground vibrational state (. = 0), J = 3-2 and 4-3 rotational lines of HCN and HCO+ fail to probe the highly enshrouded, compact nuclear regions owing to strong self-and continuum absorption. The HCN and HCO+ line profiles are double-peaked because of the absorption and show evidence of non-circular motions-possibly in the form of in-or outflows. Detections of vibrationally excited HCN in external galaxies are so far limited to ULIRGs and early-type spiral LIRGs, and we discuss possible causes for this. We tentatively suggest that the peak of vibrationally excited HCN emission is connected to a rapid stage of nuclear growth, before the phase of strong feedback.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
653 a galaxies: evolution
653 a galaxies: nuclei
653 a galaxies: active
653 a galaxies
7001 a Martin, S.u Institut de Radioastronomie Millimétrique (IRAM)4 aut
7001 a Costagliola, Francesco,d 1981u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)costagli
7001 a Gonzalez-Alfonso, E.u Universidad de Alcala,University of Alcalá4 aut
7001 a Muller, Sebastien,d 1976u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)mullers
7001 a Sakamoto, K.u Academia Sinica Taiwan4 aut
7001 a Fuller, G. A.u University of Manchester4 aut
7001 a Burillo, S. G.u Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)4 aut
7001 a van der Werf, P.u Universiteit Leiden (UL),Leiden University (UL)4 aut
7001 a Neri, R.u Institut de Radioastronomie Millimétrique (IRAM)4 aut
7001 a Spaans, M.u Rijksuniversiteit Groningen,University of Groningen4 aut
7001 a Combes, F.u LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France4 aut
7001 a Viti, S.u University College London (UCL)4 aut
7001 a Muhle, S.4 aut
7001 a Armus, L.u California Institute of Technology (Caltech)4 aut
7001 a Evans, A.u National Radio Astronomy Observatory,University of Virginia4 aut
7001 a Sturm, E.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Cernicharo, J.u CSIC - Instituto de Ciencia de Materiales de Madrid (ICMM)4 aut
7001 a Henkel, C.u King Abdulaziz University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Greve, T. R.u University College London (UCL)4 aut
7102 a Chalmers tekniska högskolab Institut de Radioastronomie Millimétrique (IRAM)4 org
7730 t Astronomy and Astrophysicsd : EDP Sciencesg 584q 584x 0004-6361x 1432-0746
8564 u http://publications.lib.chalmers.se/records/fulltext/231055/local_231055.pdfx primaryx freey FULLTEXT
8564 u https://www.aanda.org/articles/aa/pdf/2015/12/aa26410-15.pdf
8564 8u https://doi.org/10.1051/0004-6361/201526410
8564 8u https://research.chalmers.se/publication/231055

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