IMAGING THE ALGOL TRIPLE SYSTEM IN THE H BAND WITH THE CHARA INTERFEROMETER
Algol ( beta Per) is an extensively studied hierarchical triple system whose inner pair is a prototype semi-detached binary with mass transfer occurring from the sub-giant secondary to the main-sequence primary. We present here the results of our Algol observations made between 2006 and 2010 at the...
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| Veröffentlicht in: | The Astrophysical journal 2012-06, Vol.752 (1), p.1-13 |
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| creator | BARON, F MONNIER, J. D RIDGWAY, S. T FARRINGTON, C STURMANN, J STURMANN, L TURNER, N PEDRETTI, E ZHAO, M SCHAEFER, G PARKS, R CHE, X THUREAU, N TEN BRUMMELAAR, T. A MCALISTER, H. A |
| description | Algol ( beta Per) is an extensively studied hierarchical triple system whose inner pair is a prototype semi-detached binary with mass transfer occurring from the sub-giant secondary to the main-sequence primary. We present here the results of our Algol observations made between 2006 and 2010 at the CHARA interferometer with the Michigan Infrared Combiner in the H-band. The use of four telescopes with long baselines allows us to achieve better than 0.5 mas resolution and to unambiguously resolve the three stars. The inner and outer orbital elements, as well as the angular sizes and mass ratios for the three components, are determined independently from previous studies. We report a significantly improved orbit for the inner stellar pair with the consequence of a 15% change in the primary mass compared with previous studies. We also determine the mutual inclination of the orbits to be much closer to perpendicularity than previously established. State-of-the-art image reconstruction algorithms are used to image the full triple system. In particular an image sequence of 55 distinct phases of the inner pair orbit is reconstructed, clearly showing the Roche-lobe-filling secondary revolving around the primary, with several epochs corresponding to the primary and secondary eclipses. |
| doi_str_mv | 10.1088/0004-637X/752/1/20 |
| format | Article |
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D ; RIDGWAY, S. T ; FARRINGTON, C ; STURMANN, J ; STURMANN, L ; TURNER, N ; PEDRETTI, E ; ZHAO, M ; SCHAEFER, G ; PARKS, R ; CHE, X ; THUREAU, N ; TEN BRUMMELAAR, T. A ; MCALISTER, H. A</creator><creatorcontrib>BARON, F ; MONNIER, J. D ; RIDGWAY, S. T ; FARRINGTON, C ; STURMANN, J ; STURMANN, L ; TURNER, N ; PEDRETTI, E ; ZHAO, M ; SCHAEFER, G ; PARKS, R ; CHE, X ; THUREAU, N ; TEN BRUMMELAAR, T. A ; MCALISTER, H. A</creatorcontrib><description>Algol ( beta Per) is an extensively studied hierarchical triple system whose inner pair is a prototype semi-detached binary with mass transfer occurring from the sub-giant secondary to the main-sequence primary. We present here the results of our Algol observations made between 2006 and 2010 at the CHARA interferometer with the Michigan Infrared Combiner in the H-band. The use of four telescopes with long baselines allows us to achieve better than 0.5 mas resolution and to unambiguously resolve the three stars. The inner and outer orbital elements, as well as the angular sizes and mass ratios for the three components, are determined independently from previous studies. We report a significantly improved orbit for the inner stellar pair with the consequence of a 15% change in the primary mass compared with previous studies. We also determine the mutual inclination of the orbits to be much closer to perpendicularity than previously established. State-of-the-art image reconstruction algorithms are used to image the full triple system. 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We present here the results of our Algol observations made between 2006 and 2010 at the CHARA interferometer with the Michigan Infrared Combiner in the H-band. The use of four telescopes with long baselines allows us to achieve better than 0.5 mas resolution and to unambiguously resolve the three stars. The inner and outer orbital elements, as well as the angular sizes and mass ratios for the three components, are determined independently from previous studies. We report a significantly improved orbit for the inner stellar pair with the consequence of a 15% change in the primary mass compared with previous studies. We also determine the mutual inclination of the orbits to be much closer to perpendicularity than previously established. State-of-the-art image reconstruction algorithms are used to image the full triple system. In particular an image sequence of 55 distinct phases of the inner pair orbit is reconstructed, clearly showing the Roche-lobe-filling secondary revolving around the primary, with several epochs corresponding to the primary and secondary eclipses.</description><subject>Algol</subject><subject>ALGORITHMS</subject><subject>ASTRONOMY</subject><subject>ASTROPHYSICS</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>BINARY STARS</subject><subject>Earth, ocean, space</subject><subject>ECLIPSE</subject><subject>Exact sciences and technology</subject><subject>IMAGE PROCESSING</subject><subject>Image reconstruction</subject><subject>Imaging</subject><subject>INCLINATION</subject><subject>INTERFEROMETERS</subject><subject>MAIN SEQUENCE STARS</subject><subject>MASS</subject><subject>MASS TRANSFER</subject><subject>Orbital elements</subject><subject>ORBITS</subject><subject>RESOLUTION</subject><subject>ROCHE EQUIPOTENTIALS</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkU9PwkAQxTdGExH9Ap6aGBMvtfunu909Viy0sYCBGvW0WZbdWAMUu-Xgt7cFwtnTzMv8ZjJ5D4BbBB8R5DyAEIY-I9FHEFEcoADDM9BDlHA_JDQ6B70TcAmunPvuJBaiB16ycTzKJiOvSBMvzkfT3Ctm2WueePPPeZGMvWyyH6XeUzx59t6zIt3rQRrP4nZYJLNhMpuOk7a5BhdWrZy5OdY-eBsmxSD18-koG8S5r0NEG59gxTheEsUJX3LFGRMM88gsjbKCQcEtC5kmhggq6ALZBQmJFlaHFEGLqCV9cHe4W7mmlE6XjdFfutpsjG4kxpBECJGWejhQ27r62RnXyHXptFmt1MZUOydRBEUUccrFf1AUcoRhh-IDquvKudpYua3Ltap_JYKyi0J21srOadlGIZFs_-mD--N95bRa2VptdOlOm5gRGAosyB87RX8d</recordid><startdate>20120610</startdate><enddate>20120610</enddate><creator>BARON, F</creator><creator>MONNIER, J. 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A</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>BARON, F</au><au>MONNIER, J. D</au><au>RIDGWAY, S. T</au><au>FARRINGTON, C</au><au>STURMANN, J</au><au>STURMANN, L</au><au>TURNER, N</au><au>PEDRETTI, E</au><au>ZHAO, M</au><au>SCHAEFER, G</au><au>PARKS, R</au><au>CHE, X</au><au>THUREAU, N</au><au>TEN BRUMMELAAR, T. A</au><au>MCALISTER, H. 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| subjects | Algol ALGORITHMS ASTRONOMY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BINARY STARS Earth, ocean, space ECLIPSE Exact sciences and technology IMAGE PROCESSING Image reconstruction Imaging INCLINATION INTERFEROMETERS MAIN SEQUENCE STARS MASS MASS TRANSFER Orbital elements ORBITS RESOLUTION ROCHE EQUIPOTENTIALS |
| title | IMAGING THE ALGOL TRIPLE SYSTEM IN THE H BAND WITH THE CHARA INTERFEROMETER |
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