| Photometric and spectroscopic study of flares on Ross 15 |
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| 作者姓名： | Jian-Ying Bai Ali Esamdin Xing Gao Yan Yan Juan-Juan Ren |
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| 作者单位： | Xinjiang Astronomical Observatory;University of Chinese Academy of Sciences;National Astronomical Observatories;CAS Key Laboratory of Solar Activity |
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| 基金项目： | the National Natural Science Foundation of China (Grant No. 11873081);partially supported by the Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, CAS。 |
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| 摘 要： | We conducted photometric and spectroscopic observations of Ross 15 in order to further study the flare properties of this less observed flare star.A total of 28 B-band flares are detected in 128 hr of photometric observations,leading to a total flare rate of 0.22-0.040.04 h-1,more accurate than that provided by previous work.We give the energy range of the B-band flare(1029.5-1031.5 erg) and the flare frequency distribution(FFD) for the star.Within the same energy range,the FFD is lower than that of GJ 1243(M4)and YZ CMi(M4.5),roughly in the middle of those of three M5-type stars and higher than the average FFDs of spectral types> M6.We performed,for the first time for Ross 15,simultaneous high-cadence spectroscopic and photometric observations,resulting in detection of the most energetic flare in our sample.The intensity enhancements of the continuum and Balmer lines with significant correlations between them are detected during the flare,which is the same as those of other deeply studied flare stars with similar spectral type.
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| 关 键 词： | stars:flare stars:activity stars:late-type |
Photometric and spectroscopic study of flares on Ross 15 |
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| Jian-Ying Bai,Ali Esamdin,Xing Gao,Yan Yan,Juan-Juan Ren.Photometric and spectroscopic study of flares on Ross 15[J].Research in Astronomy and Astrophysics,2021(1). |
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| Abstract: | We conducted photometric and spectroscopic observations of Ross 15 in order to further study the flare properties of this less observed flare star.A total of 28 B-band flares are detected in 128 hr of photometric observations,leading to a total flare rate of 0.22_(-0.04)~(0.04) h~(-1),more accurate than that provided by previous work.We give the energy range of the B-band flare(10~(29.5)-10~(31.5) erg) and the flare frequency distribution(FFD) for the star.Within the same energy range,the FFD is lower than that of GJ 1243(M4)and YZ CMi(M4.5),roughly in the middle of those of three M5-type stars and higher than the average FFDs of spectral types M6.We performed,for the first time for Ross 15,simultaneous high-cadence spectroscopic and photometric observations,resulting in detection of the most energetic flare in our sample.The intensity enhancements of the continuum and Balmer lines with significant correlations between them are detected during the flare,which is the same as those of other deeply studied flare stars with similar spectral type. |
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