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  • Result 51-60 of 91437
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51.
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52.
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53.
  • Aalto, Mikko, et al. (author)
  • Viskeraalinen leishmaniaasi tunnistamattomana tappavana tautina : [Visceral leishmaniasis as an unrecognized deadly disease]
  • 2023
  • In: Duodecim. - : Finnish Medical Society Duodecim. - 0012-7183 .- 2242-3281. ; 139:11, s. 885-891
  • Journal article (peer-reviewed)abstract
    • Visceral leishmaniasis is a disease caused by Leishmania parasites and transmitted by Phlebotomine sandflies. It affects primarily children and is fatal without treatment but curable with early treatment. Its clinical features are prolonged fever, wasting, hepatosplenomegaly and pancytopenia. Doctors have limited knowledge about its diagnostics. This leads to incorrect diagnoses and deaths, and the disease remains unrecognized. To break this vicious circle, active search of the disease is needed also where environmental factors are conductive to its presence, but it has never been reported. We describe discovering new foci of visceral leishmaniasis in Northern Somalia, Somaliland and Tanzania. 
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54.
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55.
  • Aalto, Susanne, 1964, et al. (author)
  • 13CO 1-0 imaging of the Medusa merger, NGC 4194. Large scale variations in molecular cloud properties
  • 2010
  • In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 522:5
  • Journal article (peer-reviewed)abstract
    • Aims. Studying molecular gas properties in merging galaxies gives important clues to the onset and evolution of interaction-triggered starbursts. The (CO)-C-12/(CO)-C-13 line intensity ratio can be used as a tracer of how dynamics and star formation processes impact the gas properties. The Medusa merger (NGC 4194) is particularly interesting to study since its L-FIR/L-CO ratio rivals that of ultraluminous galaxies (ULIRGs), despite the comparatively modest luminosity, indicating an exceptionally high star formation efficiency (SFE) in the Medusa merger. Methods. High resolution OVRO (Owens Valley Radio Observatory) observations of the (CO)-C-13 1-0 have been obtained and compared with matched resolution OVRO (CO)-C-12 1-0 data to investigate the molecular gas cloud properties in the Medusa merger. Results. Interferometric observations of (CO)-C-12 and (CO)-C-13 1-0 in the Medusa (NGC 4194) merger show the (CO)-C-12 (CO)-C-13 1-0 intensity ratio (R) increases from normal, quiescent values (7-10) in the outer parts (r > 2 kpc) of the galaxy to high (16 to > 40) values in the central (r
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56.
  • Aalto, Susanne, 1964, et al. (author)
  • A precessing molecular jet signaling an obscured, growing supermassive black hole in NGC 1377?
  • 2016
  • In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 590, s. Art. no. A73-
  • Journal article (peer-reviewed)abstract
    • With high resolution (0."25 × 0."18) ALMA CO 3-2 (345 GHz) observations of the nearby (D = 21 Mpc, 1" = 102 pc), extremely radio-quiet galaxy NGC 1377, we have discovered a high-velocity, very collimated nuclear outflow which we interpret as a molecular jet with a projected length of ± 150 pc. The launch region is unresolved and lies inside a radius r 40% of the flux in NGC 1377 and may be a slower, wide-angle molecular outflow which is partially entrained by the molecular jet. We discuss the driving mechanism of the molecular jet and suggest that it is either powered by a (faint) radio jet or by an accretion disk-wind similar to those found towards protostars. It seems unlikely that a massive jet could have been driven out by the current level of nuclear activity which should then have undergone rapid quenching. The light jet would only have expelled 10% of the inner gas and may facilitate nuclear activity instead of suppressing it. The nucleus of NGC 1377 harbours intense embedded activity and we detect emission from vibrationally excited HCN J = 4-3?2 = 1f which is consistent with hot gas and dust. We find large columns of H2 in the centre of NGC 1377 which may be a sign of a high rate of recent gas infall. The dynamical age ofthe molecular jet is short (
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57.
  • Aalto, Susanne, 1964 (author)
  • Astrochemistry and star formation in nearby galaxies: From galaxy disks to hot nuclei
  • 2016
  • In: EAS Publications Series. - : EDP Sciences. - 1633-4760 .- 1638-1963. - 9782759820221 ; 75-76, s. 73-80
  • Conference paper (peer-reviewed)abstract
    • Studying the molecular phase of the interstellar medium in galaxies is fundamental for the understanding of the onset and evolution of compact and extended star formation, and of the growth of supermassive black holes. Molecular line emission is an excellent tracer of chemical, physical and dynamical conditions in the cold neutral gas. Key molecules in extragalactic studies are e.g. HCN, HCO+, HC3N, SiO, CH3OH, H2O. Furthermore, we can use IR excited molecular emission to probe the very inner regions of luminous infrared galaxies allowing us to get past the optically thick dust barrier of the compact obscured nuclei where lines of CO, HCN and HCO+ in their vibrational ground state (?=0) may be self-absorbed. Finally, molecular outflows and their chemistry are briefly discussed-including new ALMA results on for example the outflow of the lenticular galaxy NGC1377 and a study of the chemistry of the outflow of the quasar Mrk231.
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58.
  • Aalto, Susanne, 1964 (author)
  • Chemistry in luminous AGN and starburst galaxies
  • 2008
  • In: Proceedings of "Science with the Atacama Large Millimeter Array", eds. R. Bachiller and J. Cernicharo, Madrid, 13-17 Nov 2006, Springer. - 9781402069345 ; , s. 273-278
  • Conference paper (peer-reviewed)
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59.
  • Aalto, Susanne, 1964 (author)
  • Chemistry in luminous AGN and starburst galaxies
  • 2008
  • In: Astrophysics and Space Science. - : Springer Science and Business Media LLC. - 1572-946X .- 0004-640X. ; 313:1-3, s. 273-278
  • Journal article (peer-reviewed)abstract
    • Molecular line emission is a useful tool for probing the highly obscured inner kpc of starburst galaxies and buried AGNs. Molecular line ratios serve as diagnostic tools of the physical conditions of the gas-but also of its chemical properties. Both provide important clues to the type and evolutionary stage of the nuclear activity. While CO emission remains the main tracer for molecular distribution and dynamics, molecules such as HCN, HNC, HCO+, CN and HC3N are useful for probing the properties of the denser (n greater than or similar to 10(4) cm(-3)), star-forming gas. Here I discuss current views on how line emission from these species can be interpreted in luminous galaxies. HNC, HCO+ and CN are all species that can be associated both with photon dominated regions (PDRs) in starbursts-as well as X-ray dominated regions (XDRs) associated with AGN activity. HC3N line emission may identify galaxies where the starburst is in the early stage of its evolution.
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  • Result 51-60 of 91437
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aut (117)
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He, Sailing (100)
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Lind, Lars (60)
Li, J. (59)
Halldin, C (58)
Zhang, Z. (56)
Olsson, T (56)
Wormbs, Nina, 1968- (55)
Liu, Y. (54)
Zhang, Y. (54)
Schlatter, Philipp (54)
Ringden, O (54)
Andersson, Martin (53)
Agrell, Erik, 1965 (52)
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Zhang, J. (50)
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Bosch, Jan, 1967 (50)
Wang, H. (49)
Zhang, H. (49)
Winblad, B (49)
Samuelson, Lars (49)
Liu, Johan, 1960 (49)
Chen, Deliang, 1961 (49)
Wang, C. (48)
Engström, Tomas, 195 ... (48)
McKelvey, Tomas, 196 ... (48)
Sturfelt, Lina (47)
Zhang, L. (47)
Li, X. (47)
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