High-resolution spectroscopy of low-mass stars

Seemann, Ulf

dc.contributor.advisor	Reiners, Ansgar Prof. Dr.
dc.contributor.author	Seemann, Ulf
dc.date.accessioned	2015-03-23T11:10:17Z
dc.date.available	2015-03-23T11:10:17Z
dc.date.issued	2015-03-23
dc.identifier.uri	http://hdl.handle.net/11858/00-1735-0000-0022-5F8F-7
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-4979
dc.language.iso	eng	de
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subject.ddc	530	de
dc.title	High-resolution spectroscopy of low-mass stars	de
dc.type	doctoralThesis	de
dc.contributor.referee	Dreizler, Stefan Prof. Dr.
dc.date.examination	2014-04-02
dc.subject.gok	Physik (PPN621336750)	de
dc.description.abstracteng	High-resolution spectroscopy is employed to investigate a large sample of open cluster low-mass stars. The stellar rotation and magnetic activity of these stars are measured and their correlation is studied. I find in this sample that the same relation between these parameters holds on either side around the mass where stellar structure changes from partially to fully convective. These results promote a rotation driven magnetic dynamo mechanism in this whole mass regime for stars of intermediate ages (∼ 625Myr), and advocate against a correlation between rapid rotation prevalence and the transition to full convection. In this work, also a new wavelength calibration device is developed for the technique of highresolution spectroscopy. This device enables unprecedented long pathlengths in transmission spectroscopy of absorption gases for wavelength referencing. The concept and design are presented and a detailed implementation of this design for a high-resolution near-infrared spectrograph (VLT/CRIRES) is modelled and characterized. The novel approach allows for higher precision wavelength calibration than existing techniques of similar kind.	de
dc.contributor.coReferee	Hatzes, Artie Prof. Dr.
dc.contributor.thirdReferee	Schmitt, Jürgen Prof. Dr.
dc.subject.eng	high-resolution spectroscopy	de
dc.subject.eng	low-mass stars	de
dc.subject.eng	M-dwarfs	de
dc.subject.eng	stellar rotation	de
dc.subject.eng	stellar activity	de
dc.subject.eng	magnetic fields	de
dc.subject.eng	open clusters: Hyades	de
dc.subject.eng	astronomical instrumentation	de
dc.subject.eng	infrared spectrographs	de
dc.subject.eng	VLT/CRIRES	de
dc.subject.eng	wavelength calibration	de
dc.subject.eng	gas absorption cell	de
dc.subject.eng	high-precision radial velocities	de
dc.subject.eng	optical design	de
dc.identifier.urn	urn:nbn:de:gbv:7-11858/00-1735-0000-0022-5F8F-7-1
dc.affiliation.institute	Fakultät für Physik	de
dc.identifier.ppn	820769118

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