par Behara, Natalie Thérèse ;Jeffery, Simon
Référence Astronomy & astrophysics, 451, 2, page (643-650)
Publication Publié, 2006-05
Article révisé par les pairs
Résumé : We describe an opacity sampled version of the LTE model atmosphere code STERNE with revised continuous opacities. In particular, we examine the results of replacing the existing treatment of the continuous opacities which followed the method of Kurucz (1970, SAOSR, No. 309) and Peach (1970, MNRAS, 73, 1), with photoionization cross-sections from the Opacity Project and the IRON Project, and the effects of substituting an opacity distribution function method for treating the line opacities with an opacity sampling method. In studying the application of these new models to atmospheres with hydrogen-rich and extreme chemical compositions, we find the new opacity treatment increases the temperature in the line forming region by up to 3000 K for extremely hydrogen-poor stars and up to 1250 K for hydrogen-rich stars with T eff = 30 000 K and log g = 3.00. This translates into systematically cooler effective temperature measurements for these types of stars. © ESO 2006.

Documents en relation

DI-fusion

  • The Gaia-ESO Survey: new spectroscopic binaries in the Milky Way
    par Van Der Swaelmen, Mathieu , Merle, Thibault , Van Eck, Sophie , Jorissen, Alain
    Publication 2024-04-30
  • Atomic data and expansion opacity calculations in two representative 4d transition elements, niobium and silver, of interest for kilonovae studies
    par Ben Nasr, Sirine , Carvajal Gallego, Helena , Deprince, Jérôme , Palmeri, Patrick , Quinet, Pascal
    Publication 2023-10
  • MELCHIORS. The Mercator Library of High Resolution Stellar Spectroscopy
    par Royer, P. , Merle, Thibault , Dsilva, Karan Singh , Sekaran, Sanjay , Van Winckel, Hans , Frémat, Yves , Van Der Swaelmen, Mathieu , Gebruers, S. , Tkachenko, Andrew , Laverick, Mike , Dirickx, M. , Raskin, Gert , Hensberge, Herman , Abdul-Masih, Michael , Acke, Bram , Alonso, M. L. , Bandhu Mahato, S. , Beck, P.~G. , Behara, Natalie Thérèse , Bloemen, Steven , Buysschaert, B. , Cox, N. , Debosscher, J. , De Cat, Peter , Degroote, P. , De Nutte, R. , De Smedt, K. , de Vries, B. , Dumortier, L. , Escorza Santos, Ana , Exter, Katrina , Goriely, Stéphane , Gorlova, Nadya , Hillen, M. , Homan, Ward , Jorissen, Alain , Kamath, Devika , Karjalainen, M. , Karjalainen, R. , Lampens, Patricia , Lobel, Alex , Lombaert, R. , Marcos-Arenal, P. , Menu, J. , Merges, F. , Moravveji, Ehsan , Nemeth, P. , Neyskens, Pieter , Ostensen, R. , Pápics, P.~I. , Perez, J. , Prins, Saskia , Royer, S. , Samadi-Ghadim, A. , Sana, Hugues , Sans Fuentes, A. , Scaringi, Simone , Schmid, V. , Siess, Lionel , Siopis, Christos , Smolders, Kristof , Sódor, Á. , Thoul, Anne , Triana, Santiago Andrés S. , Vandenbussche, Bart , Van de Sande, M. , Van De Steene, Griet , Van Eck, Sophie , van Hoof, P.A.M. , Van Marle, A. J. , Van Reeth, Timothy , Vermeylen, L. , Volpi, Delia , Vos, J. , Waelkens, Christoffel
    Publication 2024-01-01
  • Dancing with the stars: a review on stellar multiplicity
    par Merle, Thibault
    Publication 2024-03-01
  • An update of SB9 orbits using HERMES/Mercator radial velocities
    par Merle, Thibault , Pourbaix, Dimitri , Jorissen, Alain , Siopis, Christos , Van Eck, Sophie , Van Winckel, Hans
    Publication 2024-03-01