TY - GEN
T1 - Improved determination of the atmospheric parameters of the pulsating sdB star Feige 48
AU - Latour, M.
AU - Fontaine, G.
AU - Brassard, P.
AU - Chayer, P.
AU - Green, E. M.
PY - 2013
Y1 - 2013
N2 - Given the importance of Feige 48 as an sdB pulsator, we sought to obtain the best possible estimates of its spectroscopic parameters with a grid of NLTE metal-blanketed model atmospheres constructed especially for that star. This small grid of 150 models includes 8 metallic elements whose abundances have been determined previously and reported in the literature. Our fitting procedure found the following parameters for Feige 48: Teff = 29 504 K, log g = 5.41 and log N(He)/N(H) =-2.90. These results are in very good agreement with previous spectroscopic estimates (which generally ignore either NLTE effects or metal blanketing), thus indicating that metal line-blanketing in NLTE-modeled for the first time here-is not a dominant factor in the atmosphere of Feige 48.
AB - Given the importance of Feige 48 as an sdB pulsator, we sought to obtain the best possible estimates of its spectroscopic parameters with a grid of NLTE metal-blanketed model atmospheres constructed especially for that star. This small grid of 150 models includes 8 metallic elements whose abundances have been determined previously and reported in the literature. Our fitting procedure found the following parameters for Feige 48: Teff = 29 504 K, log g = 5.41 and log N(He)/N(H) =-2.90. These results are in very good agreement with previous spectroscopic estimates (which generally ignore either NLTE effects or metal blanketing), thus indicating that metal line-blanketing in NLTE-modeled for the first time here-is not a dominant factor in the atmosphere of Feige 48.
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U2 - 10.1051/epjconf/20134304008
DO - 10.1051/epjconf/20134304008
M3 - Conference contribution
AN - SCOPUS:84875636809
SN - 9782759809691
T3 - EPJ Web of Conferences
BT - 40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars
T2 - 40th Liege International Astrophysical Colloquium. Ageing Low Mass Stars: From Red Giants to White Dwarfs, LIAC 2012
Y2 - 9 July 2012 through 13 July 2012
ER -