首页
登录
职称英语
Hotter and more massive than the Sun, stars called “stragglers” are puzzling
Hotter and more massive than the Sun, stars called “stragglers” are puzzling
游客
2024-01-10
10
管理
问题
Hotter and more massive than the Sun, stars called “stragglers” are puzzling to astronomers because such rapidly burning stars would not be expected to persist in ancient star clusters.
Some researchers believe that the typical blue stragglers formed when two ancient, lower-mass stars collide and merge form more massive, hotter star.
Peter Leonard theorizes alternatively that in low density globular clusters, where mergers between single stars occur too infrequently to account for the observed quantity of blue stragglers, these stragglers are created instead by a group of stars. He suggests that a pair of stars already orbiting each other presents a
larger target
for a third star or another pair. Once this new grouping forms, close encounters between the stars could prompt any two to merge as a blue straggler. Leonard’s model predicts that each blue straggler has a distant orbiting companion—as appears true of many blue stragglers in the M67 cluster of the Milky Way galaxy. [br] The reference to a “larger target” serves primarily to suggest why a
选项
A、blue straggler would be more likely to collide and merge with another star than would be a lower-mass star
B、pair of stars would be more likely to encounter other stars than would the typical blue straggler
C、pair of stars would be more likely to interact with other stars than would a single star
D、blue straggler would be more likely to interact with a pair of stars than it would with a third star
E、third star would be more likely to encounter a pair than it would to encounter a blue straggler
答案
C
解析
“更大的目标”就是为了说明成对的恒星比单颗恒星更有可能发生撞击,因此选项C正确。A、B、D、E:根据原文,蓝色离散星是撞击之后的结果,选项A、B、D、E全都在说蓝色离散星会和其他恒星发生碰撞,因此错误。
转载请注明原文地址:https://tihaiku.com/zcyy/3349643.html
相关试题推荐
Caffeine,thestimulantincoffee,hasbeencalled"themostwidelyusedpsy
Caffeine,thestimulantincoffee,hasbeencalled"themostwidelyusedpsy
Caffeine,thestimulantincoffee,hasbeencalled"themostwidelyusedpsy
Caffeine,thestimulantincoffee,hasbeencalled"themostwidelyusedpsy
Excessinventory,amassiveproblemformanybusinesses,hasseveralcauses,
Excessinventory,amassiveproblemformanybusinesses,hasseveralcauses,
So-calledenvironmentalistshavearguedthattheproposedGoldenLakeDevelopmen
Caterpillarsoffallspeciesproduceanidenticalhormonecalled"juvenilehormo
Theplantcalledthescarletgiliacanhaveeitherredorwhiteflowers.Ithad
Inspiteoffederalsubsidizingofpublictransportationsystemsmassivelyandm
随机试题
假定你是ABC公刊的Sam,刚从纽约旅行回来,请你给在美国旅行期间接待你的Joe写一封感谢信。写信日期:3月12日内容:1.感谢他在旅行期间对你的
[originaltext]M:Thisisit.Iknowthatitissmallerthanyouwanted,butit
Amorecarefulsecretary____________(就不会犯这样明显的错误了).wouldn’thavemadesuchglar
TheInternetisaninternationalcollectionofcomputernetworksthatallun
[originaltext]W:Weallknowthatthereisanundergroundcave,asmallcavewh
Ofthemanyfactorsthatcontributetopoorperformanceonstandardizedtest
返乡创业的张某在创业的头两年流转200亩土地发展规模生产,通过生产有机小杂粮,提
中央银行充当最后贷款人时,它的操作方式包括()。A.公开市场业务 B.再
金融市场中,被称为借贷资金供求指示器的利率是( )。A、法定利率 B、公
面痛以眼部痛为主的辨证归经,应属于A.足阳明经 B.足太阳经 C.足少阳经
最新回复
(
0
)