M
Marco Spaans
Researcher at Kapteyn Astronomical Institute
Publications - 219
Citations - 12155
Marco Spaans is an academic researcher from Kapteyn Astronomical Institute. The author has contributed to research in topics: Galaxy & Star formation. The author has an hindex of 57, co-authored 219 publications receiving 11467 citations. Previous affiliations of Marco Spaans include University of Groningen & Max Planck Society.
Papers
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Journal ArticleDOI
X-ray impact on the protoplanetary disks around T Tauri stars
Giambattista Aresu,Inga Kamp,Rowin Meijerink,Peter Woitke,Peter Woitke,W. F. Thi,W. F. Thi,Marco Spaans +7 more
TL;DR: In this article, the effects and importance of X-rays on the chemical and hydrostatic structure of protoplanetary disks are investigated, species tracing X-ray irradiation (for L_X >= 10^29 erg/s) are identified and predictions for [OI], [CII] and [NII] fine structure line fluxes are provided.
Proceedings ArticleDOI
Sideband separating mixer for 600-720 GHz for ALMA band 9 upgrade
Andrey Khudchenko,Ronald Hesper,Andrey M. Baryshev,Andrey M. Baryshev,Gerrit Gerlofma,J. Barkhof,J. Adema,Patricio Mena,Teun M. Klapwijk,Marco Spaans +9 more
TL;DR: In this paper, the authors presented a two-sideband (2SB) mixer and a modified cartridge design for high-frequency observational bands like ALMA (Atacama Large Millimeter Array) Band 9 (600-720 GHz).
Journal ArticleDOI
Dust temperature and time-dependent effects in the chemistry of photodissociation regions
G. B. Esplugues,G. B. Esplugues,Stéphanie Cazaux,Stéphanie Cazaux,Paola Caselli,S. Hocuk,S. Hocuk,Marco Spaans +7 more
TL;DR: In this article, a study of the dust temperature impact and time effects on the chemistry of different photodissociation regions (PDRs) is presented, using an updated version of the Meijerink PDR code and combining it with the timedependent code Nahoon.
Journal ArticleDOI
Molecular properties of (U)LIRGs: CO, HCN, HNC and HCO+
TL;DR: In this paper, a sample of FIR-luminous and OH megamaser (OH-MM) galaxies has been investigated and the ratio of high and low-density tracer lines is found to be determined by the progression of the star formation in the system.
Journal ArticleDOI
Disentangling the excitation conditions of the dense gas in M17 SW
J. P. Pérez-Beaupuits,Rolf Güsten,Marco Spaans,Volker Ossenkopf,Karl M. Menten,M. A. Requena-Torres,Helmut Wiesemeyer,Juergen Stutzki,C. Guevara,R. Simon +9 more
TL;DR: In this article, the chemical and energetic conditions in dense gas created by radiative feedback through observations of multiple CO, HCN and HCO$^+$ transitions toward the dense core of M17 SW were investigated.