たて座デルタ型変光星

Multi tool use
たて座δ型変光星(たてざデルタがたへんこうせい)は、脈動変光星の一種で、恒星表面における動径脈動及び非動径脈動の両方の原因によって光度が変化する変光星である。
通常、数時間のうちに0.003から0.9等級の範囲で明るさが変動するが、変動の周期や幅は恒星によって大きく異なる。スペクトル型はA0からF5の巨星・準巨星または主系列星である。ヘルツシュプルング・ラッセル図ではこと座RR型変光星と主系列の間に位置するが、こと座RR型変光星が種族IIの年老いた星なのに対し、たて座δ型変光星は種族Iの若い星である。
この種類の変光星のプロトタイプは、たて座δ星であり、4.65時間の周期で+4.60から+4.79まで明るさが変化する。この種類の変光星として他に有名なものには、ベガ、アルタイル、しし座β星(デネボラ)、カシオペヤ座β星、とも座ρ星等がある。
出典
- Samus N.N., Durlevich O.V., et al. Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.)
AI Velae Star at scienceworld
AI Velorum star at The Encyclopedia of Astrobiology, Astronomy, and Spaceflight
外部リンク
- AAVSO Variable Star of the Month: Delta Scuti and the Delta Scuti Variables
変光星
|
爆発型変光星 |
- BE
- FU(オリオン座FU型星)
- GCAS(カシオペヤ座γ型変光星)
- I(不規則)
- RCB(かんむり座R型変光星)
- RS(りょうけん座RS型変光星)
- SDOR(かじき座S型星)
- UV(閃光星)
- WR(ウォルフ・ライエ星)
オリオン変光星
|
脈動変光星 |
- ACYG(はくちょう座α型変光星)
- BCEP(ケフェウス座β型変光星)
- BLBOO
- CEP(ケフェイド変光星)
- DSCT(たて座δ型変光星)
- GDOR(かじき座γ型変光星)
- L(長周期で不規則)
- LPB
- M(ミラ型変光星)
- PVTEL(ぼうえんきょう座PV型変光星)
- RPHS
- RR(こと座RR型変光星)
- RV(おうし座RV型変光星)
- SR(半規則型変光星)
- SXPHE(ほうおう座SX型変光星)
- ZZ(くじら座ZZ型変光星(脈動白色矮星))
|
回転変光星 |
ACV(りょうけん座α2型変光星)
BY(りゅう座BY型変光星)
ELL(楕円体状変光星)
FKCOM(かみのけ座FK型変光星)
PSR(パルサー)
R
SXARI(おひつじ座SX型変光星)
|
激変星 |
N(新星)
SN(超新星)
UG(矮新星)
ZAND(アンドロメダ座Z型変光星)
|
食変光星 |
EA(アルゴル型変光星)
EB(こと座β型変光星)
EP
EW(おおぐま座W型変光星)
|
X線変光星 |
AM(ヘルクレス座AM型星)
|
未分類 |
|
主な変光星 |
|
ポータル
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