Ðòóòíî-ìàðãàíöåâàÿ çâåçäà
Ìàòåðèàë èç Ýíöèêëîïåäèè â ñâîáîäíîé ýíöèêëîïåäèè
Ðòóòíî-ìàðãàíöåâàÿ çâ¸çäà â çâåçäà, â ñïåêòðå êîòîðîé ïðèñóòñòâóþò ëèíèè ïîãëîùåíèÿ ðòóòè Hg II (398,4 íì) è ìàðãàíöà Mn II (420,6 è 432,6íì).
Ðòóòíî-ìàðãàíöåâûå çâ¸çäû ïðèíàäëåæàò ê ñïåêòðàëüíûì êëàññàì B8 è B9, íî èìåþò äâå ÿðêèå îñîáåííîñòè:
- èçáûòîê â àòìîñôåðå òàêèõ ýëåìíòîâ, êàê P, Mn, Ga, Sr, Y, Zr, Pt, Hg;
- îòñóòñòâèå ñèëüíîãî ìàãíèòíîãî ïîëÿ.
Âïåðâûå ñèëüíûå ëèíèè Mn II â çâ¸çäíîì ñïåêòðå áûëè îáíàðóæåíû Ìîðãàíîì â 1933 ãîäó.
[ïðàâèòü] Ïðèìåðû
Ê ðòóòíî-ìàðãàíöíåâûì çâ¸çäàì îòíîñÿòñÿ (â ñêîáêàõ óêàçàí ñïåêòðàëüíûé êëàññ):
- α And (B8IVmnp)
- γ Crv (B8III)
- 20 Tau (B8III),
- χ Lup (B9IV),
- γ CMa (B8II),
- φ Her (B9mnp).
[ïðàâèòü] Ññûëêè
- Ðòóòíî-ìàðãàíöåâàÿ çâåçäà â The Internet encyclopedia of science (àíãë.)
- Ðòóòíî-ìàðãàíöåâàÿ çâ¸çäà â Ecyclopedia.com (àíãë.)
- Manganese abundances in Mercury-Manganese stars
- MERCURY ELEMENTAL AND ISOTOPIC ABUNDANCES IN MERCURY-MANGANESE STARS
