近期，我國科(ke)(ke)研(yan)人(ren)員通過位于(yu)貴(gui)州(zhou)的500米口徑球面射電望遠鏡FAST，發現了一個名為M71E的脈(mo)沖雙(shuang)星系(xi)統，這是(shi)迄今科(ke)(ke)學界(jie)發現的最短(duan)軌道周期的脈(mo)沖雙(shuang)星系(xi)統。該科(ke)(ke)研(yan)成果(guo)于(yu)北(bei)京時間(jian)6月21日(ri)在國際(ji)學術期刊《自(zi)然》（nature）發表。

在這項研究中(zhong)，中(zhong)國(guo)科學院國(guo)家(jia)(jia)天文臺的(de)(de)(de)(de)(de)(de)科研人員(yuan)利(li)用FAST球(qiu)面射(she)電(dian)望遠鏡發現了位于(yu)球(qiu)狀(zhuang)星(xing)(xing)(xing)(xing)(xing)團M71附近的(de)(de)(de)(de)(de)(de)這個脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)雙(shuang)星(xing)(xing)(xing)(xing)(xing)系統，并確(que)認(ren)脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)(de)(de)自轉(zhuan)周期(qi)為4.44毫秒(miao)，伴(ban)星(xing)(xing)(xing)(xing)(xing)圍(wei)繞(rao)脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)旋轉(zhuan)軌道周期(qi)為53分(fen)鐘(zhong)，這是(shi)目(mu)前(qian)科學界發現的(de)(de)(de)(de)(de)(de)最短軌道周期(qi)的(de)(de)(de)(de)(de)(de)脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)雙(shuang)星(xing)(xing)(xing)(xing)(xing)系統。在此基礎上(shang)，FAST對該(gai)脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)雙(shuang)星(xing)(xing)(xing)(xing)(xing)系統進行(xing)的(de)(de)(de)(de)(de)(de)持續(xu)觀測中(zhong)，脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)信(xin)號沒有(you)(you)由于(yu)伴(ban)星(xing)(xing)(xing)(xing)(xing)遮擋(dang)導致的(de)(de)(de)(de)(de)(de)中(zhong)斷，這表明(ming)圍(wei)繞(rao)脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)旋轉(zhuan)的(de)(de)(de)(de)(de)(de)伴(ban)星(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)(de)(de)(de)軌道傾角非常小，脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)與伴(ban)星(xing)(xing)(xing)(xing)(xing)繞(rao)轉(zhuan)的(de)(de)(de)(de)(de)(de)轉(zhuan)軸近乎直指(zhi)地球(qiu)，這一現象(xiang)存在概(gai)率在所有(you)(you)脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)雙(shuang)星(xing)(xing)(xing)(xing)(xing)系統中(zhong)僅有(you)(you)1.5%。另外，科研人員(yuan)還發現M71E的(de)(de)(de)(de)(de)(de)伴(ban)星(xing)(xing)(xing)(xing)(xing)質量(liang)約為太(tai)陽質量(liang)的(de)(de)(de)(de)(de)(de)7%，這是(shi)天文學家(jia)(jia)們觀測到(dao)的(de)(de)(de)(de)(de)(de)首(shou)個介于(yu)天文學上(shang)兩類(lei)蜘(zhi)蛛脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)演化(hua)(hua)之(zhi)間的(de)(de)(de)(de)(de)(de)天體(ti)，該(gai)發現填補了兩類(lei)蜘(zhi)蛛脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)演化(hua)(hua)中(zhong)間狀(zhuang)態的(de)(de)(de)(de)(de)(de)空白，完善了脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)雙(shuang)星(xing)(xing)(xing)(xing)(xing)系統吸積演化(hua)(hua)理(li)論的(de)(de)(de)(de)(de)(de)證據鏈，對脈(mo)(mo)沖(chong)(chong)(chong)(chong)(chong)星(xing)(xing)(xing)(xing)(xing)星(xing)(xing)(xing)(xing)(xing)族理(li)論研究具有(you)(you)重要意(yi)義。（央(yang)視新聞）