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CV Ralph Neuhäuser CV Ralph Neuhäuser Birthday and place: 6 August 1966 in Soest/Westfalen, Germany Married to Dagmar L. Neuhäuser M.A., author/independent researcher 1972 - 1985 Elementary and High School in Soest 1985 - 1987 Studying physics at Ruhr-Universität Bochum 1986 - 1995 Scholarship award from Hanns-Seidel foundation 1987 - 1988 Studying physics at University of Sussex, England (with project on star formation with Prof. L. Mestel) 6 - 8/1988 Summer Session of International Space University (MIT, Cambridge, USA) 1988 - 1992 Studying physics at Ruhr-Universität Bochum (finished July 1992) 1989 - 1992 Student fellow at Planetarium Bochum and University Bochum 1991 - 1992 Diploma thesis on Radial migration of planetesimals 7/1992 Diploma in Physics (Ruhr-Universität Bochum) 9/1992 - 2/1996 PhD in Astronomie (LMU München und MPE Garching) Topic: ROSAT Survey of the Taurus-Auriga T Association Supervisor: Prof. Morfill and Prof. Trümper Dissertation: summa cum laude, overall: magna cum laude 2/1996 - 1/1999 Post-Doc in DFG-priority program Physics of star formation (MPE Garching) 5/1997 Invited Review Article in Science 1997-2002 Head of sub-group of X-ray emission of young stars at MPE (with up to 15 people) 1998-2002 Teaching at LMU München in astronomy and physics 9/1998 Ludwig-Biermann-Award of Astronomische Gesellschaft 1999-2002 Fellow at MPE Garching 10/2000 - 4/2001 Guest Scientist at Institute for Astronomy, University of Hawai’i 1/2003 Habilitation in astronomy at LMU München Topic: Young nearby stars and sub-stellar companions since Full Professor (Chair for Astrophysics) and Director of Astrophysical Institute early 2003 and University Observatory of Friedrich-Schiller-Universität Jena, Germany (with full tenure) 1 • Scientific Interest: – Formation of stars, brown dwarfs, and planets: Testing and constraining formation models by measuring ages, masses, and radii: Optical, infrared, and X-ray observations of young stars and sub-stellar objects (brown dwarfs and planets), mostly companions to young stars, by imaging (e.g. adaptive optics) and spectroscopy, e.g. review on young nearby stars (Neuhäuser 1997 Sci), first X-ray detection of brown dwarfs (Neuhäuser & Comeron 1998 Sci), common proper motion pairs TWA-5 A+B, GQ Lup A+b etc., pho- tometric transit observations (PI of international YETI collaboration). – Nearby isolated neutron stars: Testing and constraining the Equation-of-state of Neu- tron Star matter: X-ray and optical observations of intermediate-age nearby isolated neu- tron stars to determine mass and radius (e.g. discovery of the nearest neutron star RXJ1856 in Walter, Wolk, Neuhäuser 1996 Nat), starting a new project Death and Life in the Solar Neighbourhood with tracing back the motion of all young nearby neutron stars and runaway stars to find their birth places in clusters and/or supernovae, the latter of which may have triggered new star formation, the nearest supernovae may have affected life on Earth. – since 2012 also: Terra-Astronomy – using terrestrial archives (historical reports and radioisotope archives like C-14, Be-10i, Fe-60) to study astrophysical processes (including high-energetic events on the Sun and nearby neutron star (flares), supernovae and galactic gamma-ray bursts) with possible effects on Earth climate and biosphere. • Selected publications: – Neuhäuser R., Sterzik M.F., Schmitt J.H.M.M., Wichmann R., Krautter J., 1995, ‘ROSAT survey observations of T Tauri stars in Taurus’, Astronomy and Astrophysics 297, 391-417 – Walter F.M., Wolk S.J., Neuhäuser R., 1996, ‘Discovery of a near-by isolated neutron star’, Nature 379, 233-235 – Neuhäuser R., 1997, ‘Low-mass pre-main sequence stars and their x-ray emission’. In- vited Review Article, Science 276, 1363-1370 – Neuhäuser R., Comerón F., 1998, ‘ROSAT X-ray detection of a young brown dwarf in the Chamaeleon I dark cloud’, Science 282, 83-85 – Neuhäuser R., Guenther E.W., Wuchterl G., Mugrauer M., Bedalov A., Hauschildt P., 2005, ‘Evidence for a co-moving sub-stellar companion of GQ Lup’, Astronomy and Astro- physics 435, L13-L16 – Neuhäuser R., et al. (82 co-authors), 2011, ‘Young Exoplanet Transit Initiative (YETI)’. Astronomische Nachrichten 332, 547-561 – Neuhäuser R., Hohle M.M., Ginski C., Schmidt J.G., Hambaryan V.V., Schmidt T.O.B., 2015, ‘The companion candidate near Fomalhaut - a background neutron star?’. Monthly Notices of the Royal Astronomical Society 448, 376 – Neuhäuser R. & Neuhäuser D., 2015, ‘Solar activity around AD 775 from aurorae and radiocarbon’, Astronomische Nachrichten 336, 225 – Neuhäuser R. & Neuhäuser D.L., 2015, ‘Variations of 14C around AD 775 and AD 1795 – due to solar activity’ Astronomische Nachrichten 336, 930 – Neuhäuser R., Rada W., Kunitzsch P., Neuhäuser D.L., 2016, ‘Arabic reports about Supernovae 1604 and 1572 in Rawh. al-R¯uh. written by c¯Is¯ab. Lut.f All¯ahfrom Yemen’. Journal of the History of Astronomy 47, 359-374 – statistics: 226 refereed papers (as of Feb 2019), 1 paper cited 265 times, 10 more paper cited more than 100 times, total number of citations: 6988 (source: ADS); h=49 from ADS as of Feb 2019; similar on ISI Web of Science. 2 • New science project: Terra-Astronomy We use terrestrial archives (historical reports and radioisotopes) to study astrophysical processes with possible effects on Earth climate and biosphere; such studies include the Sun’s long-term irradiance variations, flares of normal stars and neutron stars, supernovae, gamma-ray bursts, etc. We can use historical reports on solar activity and explosive events on stars from all civilizations on Earth; while European and Eastern Asian reports have been studied already, historical reports from Arabia were not fully considered, yet. Terra-Astronomy is universal and inter-disciplinary. Long-range project: For the last few Myr and within a few kpc, we can identify locations (and times) of supernovae by tracing back young nearby neutron stars and runaway stars: When a neutron star past through an OB association within its previous life-time, it may have formed there in a supernova. If a neutron stars and a runaway star were at the same time at the same place, e.g. in an OB association, then it is very likely that a supernova took place (at that time and location) in a binary - releasing both the neutron star and the runaway star. In this project, we can find the neutron star that was born in the supernova, that placed 60Fe on Earth about 2 Myr ago. If successful, we can constrain the distance towards that supernova, and we can then test supernova yield models for radionucleids. A very nearby supernova could have affected climate and/or life on Earth. See publications by former PhD student Tetzlaff et al. with Neuhäuser 2009 to 2014. Short range project: For the last three millennia, we can reconstruct solar activity from his- torical reports about aurorae, sunspots, comet tail length, and detections of the corona during solar eclipses - as well as using radionucleid archives on Earth: The larger the solar activity and wind, the less cosmic rays enter the solar system, so that less radionucleids (14C, 10Be etc) are formed, and viceversa. The variable solar activity may have had a pronounced impact on Earth climate. Also for the last few millennia, historical observations are available for nearby Galactic su- pernovae, providing information about the explosion time (hence, the age of the supernova remnant and the neutron star, if existing) as well about its location (important for identifying the supernova remnant and the neutron star, if existing) and the evolution of brightness and color (relevant for classifying the supernova type as thermo-nuclear or core-collapse). Nearby supernovae may also be detectable in radionucleid archives. For testing this hypothesis, it is important to understand solar activity for those time intervals. Hambaryan V.V. & Neuhäuser R., 2013, A Galactic short gamma-ray burst as cause for the 14C peak in AD 774/5, MNRAS 430, 32 Chapman J., Csikszentmihalyi M., Neuhäuser R., 2014, The Chinese comet observation in AD 773 January, AN 335, 964 Neuhäuser R. & Neuhäuser D.L., 2015, Solar activity around AD 775 from aurorae and radio- carbon, AN 336, 225 Neuhäuser R. & Neuhäuser D.L., 2015, Variations of 14C around AD 775 and AD 1795 – due to solar activity, AN 336, 930 Neuhäuser R. & Neuhäuser D.L., 2016, Sunspot numbers based on historical records in the 1610s – early telescopic observations by Simon Marius and others, AN 337, 581 Neuhäuser R., Rada W., Kunitzsch P., Neuhäuser D.L., 2016, Arabic reports about Supernovae 1604 and 1572 in Rawh. al-R¯uh. written by c¯Is¯ab. Lut.f All¯ahfrom Yemen, JHA 47, 359 Neuhäuser R., Neuhäuser D.L., Rada W., Chapman J., Luge, D., Kunitzsch P., 2017, Inter- pretation of the historical Yemeni reports of supernova SN 1006: early discovery in mid-April 1006 ? AN 338, 8 3 • Teaching and Supervision of Thesis work: – Supervision of Post-docs: The following former post-docs are on permanent positions in astrophysics now: Tom Hearty (NASA), Markus Mugrauer (U Jena), Nicolas Grosso, Patrick Guillout (both Strass- burg), Matilde Fernandez (U Granada, faculty), Gracjan Maciejewski (U Torun), Theo Pribulla, Martin Vanko (Obs. High Tatra), Kengo Tachihara (U Nagoya), and Stefano Minardi (AIP Potsdam); Markus Hohle (former PhD student and then post-doc at AIU Jena) is on a lecturer position at LMU Munich (since Aug. 2013). – Supervision of PhD students: (career track) Beate Stelzer X-ray emission of young stars faculty U Tübingen Viki Joergens Young brown dwarfs (private company) Nuria Huelamo
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