最小質量恆星列表
這是一份有關最小質量恆星的列表,依木星質量與太陽質量的多寡來依序排列。
恆星質量是恆星最重要的一個要素。質量加上化學成分能確定一顆恆星的光度、實際上的大小和最後的命運。列在表上的恆星質量都小於1倍太陽質量,包括棕矮星與紅矮星。研究顯示大於13倍木星質量的天體會發生氘核聚變,而大於65倍木星質量的天體會產生鋰聚變,因此恆星的質量不會低於13倍木星質量[1]。棕矮星是類恆星天體的一種,它們是所謂「失敗的恆星」(Failed Star),由於質量不足,不能像正常恆星那樣通過氫核聚變維持光度,無法成為主序星。但它們的內部及表面均呈對流狀態,不同的化學物質並不會在內部分層存在。研究表明褐矮星為處於13倍木星質量與75-80倍木星質量之間的天體。[2]
小質量恆星的種類
列表
恆星名稱 | 太陽質量 | 木星質量 | 光谱类型 | 參考文獻 |
---|---|---|---|---|
木星(非恒星,参照物) | 0.00096 | 1 | 行星 | [8] |
蝘蜓座110913-773444 | 0.009 | 8 | T | [9] |
OTS 44 | 0.013 | 15 | T | [10] |
蛇夫座1622 A | 0.014 | 15.5 | T | [11] |
蛇夫座1622 B | 0.016 | 17.5 | T | [11] |
格利泽229 | 0.021 | 25 | T | [12] |
2M1207 | 0.021 | 25 | T | [13] |
印第安座εB | 0.024 | 28 | T | [14] |
HD 98230B | 0.037 | 39 | L | [15] |
Teide 1 | 0.041 | 43 | L | [16] |
印第安座εA | 0.045 | 47 | L | [14] |
沃夫424B | 0.050 | 52 | L | [14] |
葛利斯570D | 0.050 | 52 | L | [14] |
LP 944-020 | 0.056 | 58 | L | [17] |
2MASS 0415-0935 | 0.060 | 63 | L | [18] |
Wolf 424A | 0.060 | 63 | L | [19] |
DENIS 1048-0039 | 0.065 | 68 | L | [20] |
2MASS 1835+3259 | 0.070 | 75 | L | [18] |
DENIS 0255-4700 | 0.070 | 75 | L | [20] |
格利泽1245C | 0.074 | 79 | L | [21] |
2MASS 0532+8246 | 0.077 | 81 | M9.5 | [18] |
LHS 3003(GJ 3877) | 0.077 | 81 | M9.5 | [22] |
格利澤165B | 0.080 | 84 | M9 | [23] |
格利澤623B | 0.080 | 84 | M9 | [23] |
LHS 1070B | 0.080 | 84 | M9 | [24] |
LHS 1070C | 0.080 | 84 | M9 | [24] |
羅斯614B | 0.080 | 84 | M9 | [17] |
蒂加登星 | 0.080 | 84 | M9 | [17] |
VB 10 | 0.080 | 84 | M9 | [25] |
Gl 105C | 0.082 | 86 | M9 | [26] |
LHS 292 | 0.083 | 87 | M8 | [17] |
LP 731-058 | 0.083 | 87 | M8 | [17] |
巨蟹座DX | 0.087 | 91 | M7 | [17] |
VB 8 | 0.088 | 92 | M7 | [27] |
劍魚座ABC | 0.089 | 93 | M7 | [28] |
OGLE-TR-122b | 0.091 | 96 | M6.5 | [29] |
沃夫 359 | 0.1 | 105 | M4 | [17] |
太陽 | 1.0 | 1042 | G2 | [30] |
天狼星 | 2.32 | 2436 | A2 | [31] |
参宿七 | 17 | ------ | B8 | [32] |
参宿一 | 28 | ------ | 09.5 | [33] |
R136a1 | 300 | ------ | O6-Ia0 | [34] |
堰蜓座110913-773444
蝘蜓座110913-773444比之前所知最小的棕矮星OTS 44還要小,質量祇有8倍木星質量,甚至比一些太陽系外行星還小。科學家對這個天體的分類還沒有取得共識,所以堰蜓座110913-773444可能是一顆次棕矮星或是一顆流浪行星。[9]
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