Dr. Daniel Sablowski

My interests lie in spectroscopic binary star systems and their evolutionary stages. This includes the determination of the orbital parameters and the separation of the spectra by spectral disentangling, as well as chemical analysis.

For the spectral disentangling the software Spectangular was developed. This software allows the separation of the spectra and the derivation of the orbital parameters.

In the optics group of the AIP my main focus is the development of spectroscopic systems. For this purpose I developed the software SILENT for paraxial calculation of important parameters of spectrographs.

https://dpsablowski.wordpress.com/

Optics
Technical Staff
Office: SH/101
Phone: +49 331 7499 279
dsablowskinothing@aip.de

Leibniz-Institut
für Astrophysik Potsdam (AIP)
An der Sternwarte 16
14482 Potsdam

Spectangular

Relies on spectra spread over the orbital motion of the components. These n spectra are collected in a vector o, the individual spectra of each component are collected in the solution vector x, and the problem to be solved is

o = Mx

where M is a matrix, reflecting the orbital parameters. The values of these parameters are varied by an optimization algorithm such that the residuum

r = || o - Mx ||

is minimized. Additionally, the code allows to optimize on the individual radial velocities instead of the orbital elements. This allows to work on systems with orbital distortions apart from the two body orbit. However, the code can not determine the flux ratio between the two components. This also depends on the wavelengths and it need to be determined, e.g. from photometric observations (or the equivalent width of the lines may also serve as a criterion). Nevertheless, Spectangular, allows to optimize on the flux ratios as well, but the optimization on the wavelength axis need to be bound to the equation of an SB2 or SB1 system in order to avoid confusion between these two effects.

The software can be downloaded from github.

Publications

Latest refereed publications, retrieved from NASA ADS:

St-Louis, N., ... Sablowski, D. P., ..., 2020
Monthly Notices of the Royal Astronomical Society, 497, 4, 4448; published October 2020
Participating AIP sections and groups: Technical Section / Optics
Schwope, A. D., Worpel, H., Traulsen, I., Sablowski, D., 2020
Astronomy and Astrophysics, 642, A134; published October 2020
Participating AIP sections and groups: Galaxies and Quasars / X-ray Astronomy, Technical Section / Optics
Shenar, T., Sablowski, D. P., ..., 2020
Astronomy and Astrophysics, 641, C2; published September 2020
Participating AIP sections and groups: Technical Section / Optics
Warmuth, A., Önel, H., Mann, G., Rendtel, J., Strassmeier, K. G., Denker, C., ... Anderson, J., Bauer, S.-M., Bittner, W., Dionies, F., Paschke, J., Plüschke, D., Sablowski, D. P., Schuller, F., Senthamizh Pavai, V., Woche, M., ..., 2020
Solar Physics, 295, 7, 90; published July 2020
Sablowski, D. P., Vollmann, K., 2020
New Astronomy, 75, 101303; published February 2020
Participating AIP sections and groups: Technical Section / Optics
Shenar, T., Sablowski, D. P., ..., 2019
Astronomy and Astrophysics, 627, A151; published July 2019
Participating AIP sections and groups: Technical Section / Optics
Sablowski, D. P., Järvinen, S., Weber, M., 2019
Astronomy and Astrophysics, 623, A31; published March 2019
Sablowski, D. P., Järvinen, S., Ilyin, I., Strassmeier, K. G., 2019
Astronomy and Astrophysics, 622, L11; published February 2019
Shenar, T., ... Sablowski, D. P., ..., 2017
Astronomy and Astrophysics, 598, A85; published February 2017
Participating AIP sections and groups: Technical Section / Optics
Sablowski, D. P., Weber, M., 2017
Astronomy and Astrophysics, 597, A125; published January 2017
Participating AIP sections and groups: Technical Section / Optics, Cosmology and High-Energy Astrophysics