dc.contributor.author | Kraus, S | |
dc.date.accessioned | 2018-01-15T14:23:07Z | |
dc.date.issued | 2012-09-12 | |
dc.description.abstract | Latest-generation spectro-interferometric instruments combine a milliarcsecond angular resolution with spectral capabilities, resulting in an immensely increased information content. Here, I present methodological work and results that illustrate the fundamentally new scientific insights provided by spectro-interferometry with very high spectral dispersion or in multiple line transitions (Brackett and Pfund lines). In addition, I discuss some pitfalls in the interpretation of spectro-interferometric data. In the context of our recent studies on the classical Be stars β CMi and ζ Tau, I present the first position-velocity diagram obtained with optical interferometry and provide a physical interpretation for a phase inversion, which has in the meantime been observed for several classical Be-stars. In the course of our study on the Herbig B[e] star V921 Sco, we combined, for the first time, spectro-interferometry and spectro-astrometry, providing a powerful and resource-efficient way to constrain the spatial distribution as well as the kinematics of the circumstellar gas with an unprecedented velocity resolution up to R = λ/Δλ = 100,000. Finally, I discuss our phase sign calibration procedure, which has allowed us to calibrate AMBER differential phases and closure phases for all spectral modes, and derive from the gained experience science-driven requirements for future instrumentation projects. | en_GB |
dc.description.sponsorship | This work was performed in part under contract with the California Institute of Technology (Caltech) funded
by NASA through the Sagan Fellowship Program. | en_GB |
dc.identifier.citation | Vol. 8445, article We acknowledge fundings from CNRS and INAF (grant ASI-INAF I/016/07/0). This work was in part performed under contract with the Jet Propulsion Laboratory (JPL) funded by NASA through the Michelson Fellowship Program | en_GB |
dc.identifier.doi | 10.1117/12.926801 | |
dc.identifier.uri | http://hdl.handle.net/10871/31016 | |
dc.language.iso | en | en_GB |
dc.publisher | Society of Photo-optical Instrumentation Engineers (SPIE) | en_GB |
dc.rights | © (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. | en_GB |
dc.subject | spectro-interferometry | en_GB |
dc.subject | spectro-astrometry | en_GB |
dc.subject | photocenter analysis | en_GB |
dc.subject | position-velocity diagram | en_GB |
dc.subject | kinematical modeling | en_GB |
dc.subject | multiple line transition interferometry | en_GB |
dc.subject | V921 Sco | en_GB |
dc.subject | β CMi | en_GB |
dc.subject | ζ Tau | en_GB |
dc.title | New opportunities with spectro-interferometry and spectro-astrometry | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2018-01-15T14:23:07Z | |
dc.description | This is the author accepted manuscript. The final version is available from SPIE via the DOI in this record. | en_GB |
dc.identifier.journal | Proceedings of SPIE | en_GB |