Emission lines in the spectrum of the red-dwarf flare star EV Lac: Modeling of the quiescent chromosphere
We present spectral observations of the red-dwarf flare star EV Lac made at the Crimean Astrophysical Observatory in 1994 and 1995, and describe a method for semi-empirical modeling of the chromospheres of red dwarfs based on their emission spectra. We have modeled the quiescent state of the chromos...
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| Veröffentlicht in: | Astronomy reports 2001-01, Vol.45 (1), p.67-74 |
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| creator | Baranovskii, E A Gershberg, R E Shakhovskoi, D N |
| description | We present spectral observations of the red-dwarf flare star EV Lac made at the Crimean Astrophysical Observatory in 1994 and 1995, and describe a method for semi-empirical modeling of the chromospheres of red dwarfs based on their emission spectra. We have modeled the quiescent state of the chromosphere of EV Lac for the cases of a homogeneous chromosphere and of active regions covering one-half and one-third the stellar surface. All models that are consistent with the observations indicate a region with a small vertical temperature gradient, a so-called temperature plateau. The calculated structure of the stellar chromosphere is compared with that of the solar chromosphere. |
| doi_str_mv | 10.1134/1.1336603 |
| format | Article |
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We have modeled the quiescent state of the chromosphere of EV Lac for the cases of a homogeneous chromosphere and of active regions covering one-half and one-third the stellar surface. All models that are consistent with the observations indicate a region with a small vertical temperature gradient, a so-called temperature plateau. The calculated structure of the stellar chromosphere is compared with that of the solar chromosphere.</description><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Chromosphere</subject><subject>Cosmology</subject><subject>Dwarf stars</subject><subject>Emission</subject><subject>Emission spectra</subject><subject>Emissions</subject><subject>Flare stars</subject><subject>Mathematical models</subject><subject>Spectral emissivity</subject><subject>Temperature gradient</subject><subject>Temperature gradients</subject><issn>1063-7729</issn><issn>1562-6881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNqF0btOwzAUBuAIgQQUBt7AYuAypNg-8SVsCJWLVMRSsUbGOaap0rjYiRBvjwtlYSiTbZ3Pln7_WXbC6JgxKK7YmAFISWEnO2BC8lxqzXbTnkrIleLlfnYY44JSxjTIg6yZLJsYG9-RtukwkqYj_RxJXKHtw7Ak3n2fA9Z5_WGCI641Ic17E8jkhUyNvSZPvsZ0--0Xvw8NRotdT-w8-KWPqzkGPMr2nGkjHm_WUTa7m8xuH_Lp8_3j7c00t6B5nytLRQoiFeNgaiNL5bgAU6ITppbO0gKYoghUWqWkqIGaGpUta6bkq9Mwys5_nl0F_z5g7KsU0GLbmg79ECtdlkwIreS_UhUgqSgBkjzbKjnlXAldJHixFbJ1rJIKLRI9_UMXfghd-plK60LxdT8JXf4gG3yMAV21Cs3ShM-K0Wrdd8WqTd_wBfT5mm8</recordid><startdate>20010101</startdate><enddate>20010101</enddate><creator>Baranovskii, E A</creator><creator>Gershberg, R E</creator><creator>Shakhovskoi, D N</creator><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>H8D</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L7M</scope><scope>M2P</scope><scope>P5Z</scope><scope>P62</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope></search><sort><creationdate>20010101</creationdate><title>Emission lines in the spectrum of the red-dwarf flare star EV Lac: Modeling of the quiescent chromosphere</title><author>Baranovskii, E A ; 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We have modeled the quiescent state of the chromosphere of EV Lac for the cases of a homogeneous chromosphere and of active regions covering one-half and one-third the stellar surface. All models that are consistent with the observations indicate a region with a small vertical temperature gradient, a so-called temperature plateau. The calculated structure of the stellar chromosphere is compared with that of the solar chromosphere.</abstract><cop>Heidelberg</cop><pub>Springer Nature B.V</pub><doi>10.1134/1.1336603</doi><tpages>8</tpages></addata></record> |
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| language | eng |
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| subjects | Astronomy Astrophysics Chromosphere Cosmology Dwarf stars Emission Emission spectra Emissions Flare stars Mathematical models Spectral emissivity Temperature gradient Temperature gradients |
| title | Emission lines in the spectrum of the red-dwarf flare star EV Lac: Modeling of the quiescent chromosphere |
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