The radial velocities of the RS CVn star UX Ari
نویسندگان
چکیده
منابع مشابه
Simultaneous H α , Na i D 1 , D 2 , and He i D 3 observations of a flare on the RS CVn system UX Ari ⋆
We present simultaneous Hα, Na i D 1 , D 2 , and He i D 3 spectroscopic observations on the RS CVn system UX Ari. We have found a dramatic increase in the excess Hα emission equivalent width by a factor of 2 in an interval of 1 day that indicates the beginning of a strong flare in this system. The presence of the He i D 3 in emission in coincidence with the enhancement of the Hα emission confir...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2001
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20010275