An independent distance estimate to the AGB star R Sculptoris

Author： Maercker M.   Brunner M.   Mecina M.   De Beck E.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|611|issue|A102-A102

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.611, Iss.issue, 2018-04, pp. : A102-A102

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Distance measurements to astronomical objects are essential for understanding their intrinsic properties. For asymptotic giant branch (AGB) stars it is particularly difficult to derive accurate distance estimates. Period-luminosity relationships rely on the correlation of different physical properties of the stars, while the angular sizes and variability of AGB stars make parallax measurements inherently inaccurate. For the carbon AGB star R Sculptoris, the uncertain distance significantly affects the interpretation of observations regarding the evolution of the stellar mass loss during and after the most recent thermal pulse.

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