FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100895239> ?p ?o ?g. }

• W3100895239 abstract "The mass-loss mechanism in normal K--M giant stars with small variability amplitudes is not yet understood, although they are the majority among red giant stars. We present high-spatial and high-spectral resolution observations of the 2.3 micron CO lines in the M7 giant BK Vir with a spatial resolution of 9.8 mas and a spectral resolution of 12000, using AMBER at the Very Large Telescope Interferometer (VLTI). The angular diameters observed in the CO lines are 12--31% larger than those measured in the continuum. We also detected asymmetry in the CO line-forming region. The data taken 1.5 months apart show possible time variation on a spatial scale of 30 mas (corresponding to 3 x stellar diameter) at the CO band head. Comparison of the observed data with the MARCS photospheric model shows that whereas the observed CO line spectrum can be well reproduced by the model, the angular sizes observed in the CO lines are much larger than predicted by the model. Our model with two additional CO layers above the MARCS photosphere reproduces the observed spectrum and interferometric data in the CO lines simultaneously. This model suggests that the inner CO layer at ~1.2 stellar radii is very dense and warm with a CO column density of ~10^{22} cm^{-2} and temperatures of 1900--2100K, while the outer CO layer at 2.5--3.0 stellar radii is characterized by column densities of 10^{19}--10^{20} cm^{-2} and temperatures of 1500--2100K. Our AMBER observations of BK Vir have spatially resolved the extended molecular outer atmosphere of a normal M giant in the individual CO lines for the first time. The temperatures derived for the CO layers are higher than or equal to the uppermost layer of the MARCS photospheric model, implying the operation of some heating mechanism in the outer atmosphere." @default.
• W3100895239 created "2020-11-23" @default.
• W3100895239 creator A5003972178 @default.
• W3100895239 creator A5036040105 @default.
• W3100895239 creator A5054973532 @default.
• W3100895239 creator A5058313434 @default.
• W3100895239 creator A5065652129 @default.
• W3100895239 creator A5077549364 @default.
• W3100895239 creator A5079619306 @default.
• W3100895239 creator A5081614592 @default.
• W3100895239 date "2012-01-01" @default.
• W3100895239 modified "2023-09-25" @default.
• W3100895239 title "Spatially resolving the outer atmosphere of the M giant BK Virginis in the CO first overtone lines with VLTI/AMBER" @default.
• W3100895239 cites W1535518384 @default.
• W3100895239 cites W1966609693 @default.
• W3100895239 cites W1967699291 @default.
• W3100895239 cites W1972570339 @default.
• W3100895239 cites W1973452961 @default.
• W3100895239 cites W1974905620 @default.
• W3100895239 cites W1975459411 @default.
• W3100895239 cites W1991299582 @default.
• W3100895239 cites W1991604549 @default.
• W3100895239 cites W1994112342 @default.
• W3100895239 cites W1998200272 @default.
• W3100895239 cites W2006341867 @default.
• W3100895239 cites W2010837680 @default.
• W3100895239 cites W2012268470 @default.
• W3100895239 cites W2031961728 @default.
• W3100895239 cites W2036054187 @default.
• W3100895239 cites W2052731548 @default.
• W3100895239 cites W2059744719 @default.
• W3100895239 cites W2078728610 @default.
• W3100895239 cites W2080312311 @default.
• W3100895239 cites W2089270212 @default.
• W3100895239 cites W2095471616 @default.
• W3100895239 cites W2095997114 @default.
• W3100895239 cites W2102804714 @default.
• W3100895239 cites W2111817932 @default.
• W3100895239 cites W2112394814 @default.
• W3100895239 cites W2114908771 @default.
• W3100895239 cites W2117031829 @default.
• W3100895239 cites W2124063028 @default.
• W3100895239 cites W2128663094 @default.
• W3100895239 cites W2130491796 @default.
• W3100895239 cites W2130522695 @default.
• W3100895239 cites W2133725650 @default.
• W3100895239 cites W2142220522 @default.
• W3100895239 cites W2147879406 @default.
• W3100895239 cites W2150109550 @default.
• W3100895239 cites W2151359187 @default.
• W3100895239 cites W2151413902 @default.
• W3100895239 cites W2155624457 @default.
• W3100895239 cites W2157805572 @default.
• W3100895239 cites W2160068792 @default.
• W3100895239 cites W2163341482 @default.
• W3100895239 cites W3098340845 @default.
• W3100895239 cites W3099983711 @default.
• W3100895239 cites W3101812429 @default.
• W3100895239 cites W3102512162 @default.
• W3100895239 cites W3104501551 @default.
• W3100895239 cites W3105060152 @default.
• W3100895239 cites W3105506912 @default.
• W3100895239 cites W3105683659 @default.
• W3100895239 cites W3105969274 @default.
• W3100895239 cites W4243341377 @default.
• W3100895239 cites W4291007614 @default.
• W3100895239 cites W4292399985 @default.
• W3100895239 cites W4295146742 @default.
• W3100895239 doi "https://doi.org/10.1051/0004-6361/201118128" @default.
• W3100895239 hasPublicationYear "2012" @default.
• W3100895239 type Work @default.
• W3100895239 sameAs 3100895239 @default.
• W3100895239 citedByCount "22" @default.
• W3100895239 countsByYear W31008952392012 @default.
• W3100895239 countsByYear W31008952392013 @default.
• W3100895239 countsByYear W31008952392014 @default.
• W3100895239 countsByYear W31008952392015 @default.
• W3100895239 countsByYear W31008952392016 @default.
• W3100895239 countsByYear W31008952392017 @default.
• W3100895239 countsByYear W31008952392018 @default.
• W3100895239 countsByYear W31008952392019 @default.
• W3100895239 crossrefType "journal-article" @default.
• W3100895239 hasAuthorship W3100895239A5003972178 @default.
• W3100895239 hasAuthorship W3100895239A5036040105 @default.
• W3100895239 hasAuthorship W3100895239A5054973532 @default.
• W3100895239 hasAuthorship W3100895239A5058313434 @default.
• W3100895239 hasAuthorship W3100895239A5065652129 @default.
• W3100895239 hasAuthorship W3100895239A5077549364 @default.
• W3100895239 hasAuthorship W3100895239A5079619306 @default.
• W3100895239 hasAuthorship W3100895239A5081614592 @default.
• W3100895239 hasBestOaLocation W31008952393 @default.
• W3100895239 hasConcept C101638190 @default.
• W3100895239 hasConcept C108884401 @default.
• W3100895239 hasConcept C121332964 @default.
• W3100895239 hasConcept C124967146 @default.
• W3100895239 hasConcept C1276947 @default.
• W3100895239 hasConcept C150846664 @default.
• W3100895239 hasConcept C198352243 @default.
• W3100895239 hasConcept C2524010 @default.
• W3100895239 hasConcept C2776026716 @default.

• next