MESAS Meets KINICH-PAKAL: Measure and Modeling Main Sequence Stellar Atmospheres

White et al. 2020

Jan 10, 2021 9:00 AM — Jan 15, 2021 6:00 PM
Virtual Meeting

The dominant emission mechanisms at millimeter/submillimeter remain largely unknown for most spectral types other than Solar analogues. This is due in part to the lack of data to inform stellar atmosphere models. In this work, we present a new methodology to fit the observed and synthetic spectrum of main-sequence stars through semiempirical models1. We use the Levenberg-Marquardt algorithm as a Nonlinear method, PakalMPI2 as the semiempirical model and the observations that are part of an ongoing observational campaign entitled Measuring the Emission of Stellar Atmospheres at Submillimeter/ Millimeter wavelengths3. Our results show that we can use semiempirical models as an input model to reproduce and constrain the observed spectrum of main-sequence stars4. In addition to a better understanding of stellar processes, these models are also essential for determining the stellar contribution to unresolved circumstellar disks at submillimeter/millimeter wavelengths5.


  1. Tapia-Vázquez, F., & De la Luz, V. 2020, ApJS, 246, 5 Doi ↩︎

  2. De la Luz, V., Lara, A., Mendoza-Torres, J. E., et al. 2010, ApJS, 188, 437 Doi ↩︎

  3. White, J.A., Aufdenberg, J., Boley, A.C., 2018, ApJ,859(2), p.102. Doi ↩︎

  4. White, J. A., Tapia-Vázquez, F., Hughes, A. G., et al. 2020, ApJ, 894, 76 Doi ↩︎

  5. White, J. A., Aufdenberg, J., Boley, A. C., et al. 2019, ApJ, 875, 55 Doi ↩︎

Francisco Tapia Vázquez
Francisco Tapia Vázquez
SysOps specialist | DevOps

My research interests include radioastronomy, stellar atmospheres and high performance computing.