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
27
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
•Readthearticlebelowaboutcoherence.•Foreachquestion31—40writeoneword
A、Cookedmeatproductsaresafetoeat.B、Peopleshouldeatlesspopularprepare
Firthinsistedthattheobjectoflinguisticsis______.A、languageitselfB、lang
Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,
根据下列材料,回答问1-20题 Theideathatplantsha
某派出所所长姜某身穿制服在一饭店二楼吃饭期间,闻知楼下有人打架即去劝解和调停。参
下列可以对原料药材进行细胞粉碎的粉碎方法为A.混合粉碎 B.低温粉碎 C.加
职业道德具有规范功能,其作用主要体现在对从业人员开展职业活动的()。
我国选举法规定,选区应按()来划分。 A.居住状况B.生产单位 C.事业
一个家庭关系紧张的人,尽可能缩短在家逗留的时间,变成一个“工作迷”,这一现象是(
最新回复
(
0
)