Kusan rabin taurari a cikin Galaxy suna cikin tsarin binary/multiple star system

Kusan rabin taurari a cikin Galaxy suna cikin tsarin binary/multiple star system

Yayin da haihuwar tauraro da yawa suka zama ruwan dare, binciken da aka yi a baya na wuraren jinyar taurari sun fi mayar da hankali kan samuwar taurari guda ɗaya. Sakamakon haka, masana ilmin taurari sun daɗe suna ruɗewa game da asalin tsarin taurari na binary/multiple.

Tawagar kasa da kasa karkashin jagorancin masu bincike daga Cibiyar Kula da Astronomical ta Shanghai (SHAO) na Kwalejin Kimiyya ta kasar Sin (CAS), da ke nazarin wuraren aikin jinya, ya nuna cewa kusan rabin taurari a cikin Galaxy an kafa su ne a tsarin binary/multiple star. Sun gano cewa mafi girman mahalli da tashin hankali suna samar da taurari da yawa.

Haihuwar tauraro na buƙatar rushewar sanyi, manyan aljihu na gas da ƙura, wanda akafi sani da cores. An san gizagizai na kwayoyin halitta suna dauke da wadannan kwayoyin halitta. Nazarin da suka gabata sun mayar da hankali kan yadda waɗannan gajimare na kwayoyin ke shafar yawan taurari.

A cikin wannan sabon binciken, da masu bincike An lura da hadadden Orion Cloud ta amfani da James Clerk Maxwell Telescope (JCMT) a Hawaii da Atacama Large Millimeter/ Submillimeter Array (ALMA) a Chile. Wurin da yake kusa da nisan shekarun haske 1.500 a cikin ƙungiyar taurarin Orion, wannan tauraro na gandun daji kyakkyawan dakin gwaje-gwaje ne don gwada nau'ikan samuwar tauraro daban-daban.

Tawagar ta yi nazarin sanyi guda 49, masu yawa a cikin gajimare na Orion a cikin tsarin samar da tauraro. Daga baya sun bayyana tsarin cikin gida a cikin waɗannan ƙananan muryoyin ta amfani da ALMA.

Alma lura da aka bayyana game da cores mai dorewa 13 wadanda ke ba da taurari binary / da yawa, yayin da sauran cores suka haifar da taurari guda. Kai masu bincike Hakanan an ƙididdige halaye na zahiri na waɗannan ƙananan muryoyin - kamar girman, yawan iskar gas da taro - daga abubuwan lura na JCMT.

Ga mamakin su, sun gano cewa muryoyin da ke samar da taurarin binary/multiplem suna nuna girma da yawa da iskar gas H2 fiye da taurari masu yin guda ɗaya. Duk da haka, akwai ɗan bambanci a cikin girman nau'in nau'i daban-daban.

LUO Qiuyi, Ph.D. dalibin SHAO kuma marubucin farko na binciken, ya ce, "The denser nuclei sun fi sauƙi ga gutsuttsura saboda rikice-rikicen da ke haifar da nauyi a cikin kwayoyin halitta."

Bayan lura da nuclei 49 a cikin layin kwayoyin N2H+ (J=1-0) ta amfani da na'urar hangen nesa ta Nobeyama 45-mita, ƙungiyar ta gano cewa layin layin N2H+ don nuclei da ke samar da binaries/multiples sun fi girma a kididdigar fiye da waɗanda ke samar da taurari guda ɗaya.

Prof. Ken'ichi Tatematsu, wanda ya jagoranci jawabin Nobeyama, ya ce: "Wadannan abubuwan lura na Nobeyama suna ba da kyakkyawan ma'auni na matakan tashin hankali a cikin manyan muryoyi. Abubuwan da muka gano sun nuna cewa taurarin binary/yawan tauraro suna samuwa a cikin ƙarin ruɗani.

LU ya ce, "A cikin wata kalma, mun gano cewa tauraro na binary/yawan tauraro suna tasowa a cikin ƙananan ƙwayoyin ƙwayoyin cuta a cikin wannan binciken."

LIU Sheng-Yuan, mawallafin binciken, ya ce, “JCMT ta tabbatar da zama babban kayan aiki don gano waɗannan manyan wuraren gandun daji don bin diddigin ALMA. Tare da ALMA tana ba da hankali da ƙuduri wanda ba a taɓa ganin irinsa ba, za mu iya yin irin wannan binciken akan samfurin mafi girma na manyan maƙallan don fahimtar samuwar tauraro. "

LIU Tie, marubucin binciken kuma jagoran bayanan ALMA, ya ce, "Game da aiki na gaba, har yanzu ba mu yi nazarin tasirin filayen maganadisu akan bincikenmu ba. Filayen maganadisu na iya murkushe rarrabuwar kawuna a cikin manyan muryoyi. Don haka, muna farin cikin mayar da hankali kan mataki na gaba na binciken mu a wannan fanni ta hanyar amfani da JCMT da ALMA."

Maganar Jarida:

  1. Qiu-Yi Luo et al. Binciken ALMA na Cold Galactic Orion Planck Clusters (ALMASOP): Ta yaya kaddarorin ɗigon ɗimbin yawa ke shafar yawan protostars? Jaridar Astrophysical, Volume 931, Lamba 2. DOI: 10.3847/1538-4357/ac66d9

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