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Träfflista för sökning "WFRF:(Kristensen M.) srt2:(2010-2014)"

Search: WFRF:(Kristensen M.) > (2010-2014)

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  • Appeltans, W., et al. (author)
  • The Magnitude of Global Marine Species Diversity
  • 2012
  • In: Current Biology. - : Elsevier BV. - 0960-9822 .- 1879-0445. ; 22:23, s. 2189-2202
  • Journal article (peer-reviewed)abstract
    • Background: The question of how many marine species exist is important because it provides a metric for how much we do and do not know about life in the oceans. We have compiled the first register of the marine species of the world and used this baseline to estimate how many more species, partitioned among all major eukaryotic groups, may be discovered. Results: There are similar to 226,000 eukaryotic marine species described. More species were described in the past decade (similar to 20,000) than in any previous one. The number of authors describing new species has been increasing at a faster rate than the number of new species described in the past six decades. We report that there are similar to 170,000 synonyms, that 58,000-72,000 species are collected but not yet described, and that 482,000-741,000 more species have yet to be sampled. Molecular methods may add tens of thousands of cryptic species. Thus, there may be 0.7-1.0 million marine species. Past rates of description of new species indicate there may be 0.5 +/- 0.2 million marine species. On average 37% (median 31%) of species in over 100 recent field studies around the world might be new to science. Conclusions: Currently, between one-third and two-thirds of marine species may be undescribed, and previous estimates of there being well over one million marine species appear highly unlikely. More species than ever before are being described annually by an increasing number of authors. If the current trend continues, most species will be discovered this century.
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  • Benz, A. O., et al. (author)
  • Hydrides in young stellar objects : Radiation tracers in a protostar-disk-outflow system
  • 2010
  • In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 521, s. L35-
  • Journal article (peer-reviewed)abstract
    • Context. Hydrides of the most abundant heavier elements are fundamental molecules in cosmic chemistry. Some of them trace gas irradiated by UV or X-rays. Aims: We explore the abundances of major hydrides in W3 IRS5, a prototypical region of high-mass star formation. Methods: W3 IRS5 was observed by HIFI on the Herschel Space Observatory with deep integration (≃2500 s) in 8 spectral regions. Results: The target lines including CH, NH, H3O+, and the new molecules SH+, H2O+, and OH+ are detected. The H2O+ and OH+ J = 1-0 lines are found mostly in absorption, but also appear to exhibit weak emission (P-Cyg-like). Emission requires high density, thus originates most likely near the protostar. This is corroborated by the absence of line shifts relative to the young stellar object (YSO). In addition, H2O+ and OH+ also contain strong absorption components at a velocity shifted relative to W3 IRS5, which are attributed to foreground clouds. Conclusions: The molecular column densities derived from observations correlate well with the predictions of a model that assumes the main emission region is in outflow walls, heated and irradiated by protostellar UV radiation. Herschel is an ESA space observatory with science instruments provided by a European-led Principal Investigator consortia and with important participation from NASA.Appendix (page 5) is only available in electronic form at http://www.aanda.org
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  • Result 1-10 of 91
Type of publication
journal article (82)
conference paper (9)
Type of content
peer-reviewed (81)
other academic/artistic (10)
Author/Editor
Liseau, René, 1949 (28)
van Dishoeck, E. F. (27)
Nisini, B. (27)
Caselli, P. (22)
Johnstone, D. (20)
Wyrowski, F. (20)
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Herpin, F. (20)
Benz, A. O. (20)
Codella, C. (20)
Giannini, T. (20)
Kristensen, L. (19)
Bjerkeli, Per, 1977 (19)
Bruderer, S. (19)
Hall, P (18)
Hogerheijde, M. R. (18)
Bachiller, R. (18)
Benedettini, M. (18)
Herczeg, G. J. (18)
Czene, K (17)
Larsson, Bengt (17)
Hopper, JL (17)
Andrulis, IL (17)
Fasching, PA (17)
Beckmann, MW (17)
Liu, JJ (17)
Goicoechea, J. R. (17)
Cernicharo, J. (16)
Lindblom, A (16)
Giles, GG (16)
Dominik, C. (16)
Bontemps, S. (16)
Southey, MC (16)
Couch, FJ (16)
Mannermaa, A (16)
Kataja, V (16)
Kosma, VM (16)
Lambrechts, D (16)
Fuente, A. (16)
Olberg, Michael, 195 ... (16)
Braine, J. (16)
Baudry, A. (16)
Risacher, C. (16)
Daniel, F. (16)
di Giorgio, A. M. (16)
Encrenaz, P. (16)
Fich, M. (16)
Lis, D. (16)
Parise, B. (16)
Plume, R. (16)
Saraceno, P. (16)
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University
Karolinska Institutet (37)
Chalmers University of Technology (30)
Stockholm University (19)
Lund University (15)
Uppsala University (9)
University of Gothenburg (4)
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Umeå University (3)
Linköping University (3)
Royal Institute of Technology (2)
RISE (1)
Swedish Museum of Natural History (1)
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Language
English (91)
Research subject (UKÄ/SCB)
Natural sciences (41)
Medical and Health Sciences (14)
Agricultural Sciences (2)
Engineering and Technology (1)

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