本文關(guān)鍵詞：低紅移紅外類星體的多波段光譜能量分布性質(zhì)研究　出處：《天津師范大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 紅外類星體 能量分布 恒星形成 活動星系核

【摘要】：我們以近鄰宇宙中33個紅外類星體為樣本,在收集、整理了其從高頻X射線到低頻射電波段這一基本覆蓋全部波段數(shù)據(jù)的基礎(chǔ)上,又針對光學(xué)、紫外、紅外等波段已有的多種測量結(jié)果(不同儀器或者年份得到)進(jìn)行了對比與檢驗(yàn),對一些數(shù)據(jù)進(jìn)行了多種方法的重新測量,以確保數(shù)值點(diǎn)的真實(shí)有效。在經(jīng)過消光改正、孔徑改正、波長與流量密度退紅移、光度歸一等系列操作后,我們得到了這個紅外類星體樣本中每個源的光譜能量分布(SED)以及它們的平均/中值SED。 對比研究了我們樣本中每個源以及平均后的光譜能量分布與星暴星系、類星體、極亮紅外星系以及光學(xué)選類星體等(均已在1μm處光度歸一)后發(fā)現(xiàn),紅外類星體的SED介于極亮紅外星系與光學(xué)類星體之間；同時它也介于星暴星系與類星體之間：在短波處(波長小于1μm)光學(xué)類星體(類星體)的能譜高于紅外類星體而極亮紅外星系(星暴星系)則較低；在長波處的情形恰好相反。一方面這說明星暴與活動星系核輻射均是紅外類星體的主要能量來源,只是這兩類能源的貢獻(xiàn)分布在不同的波長處。另一方面,這樣的結(jié)果在全波段能量分布角度說明了紅外類星體是一類處于演化中期的源,它們是極亮紅外星系向光學(xué)類星體演變的中間過程。 為進(jìn)一步得到兩類可能的能源主導(dǎo)機(jī)制對紅外類星體輻射能量貢獻(xiàn)的比例,我們通過星暴星系模板與類星體模板線性疊加的方式擬合了紅外類星體樣本的平均/中值SED。結(jié)果顯示在紅外類星體的高頻處,類星體貢獻(xiàn)的能量較大；而低頻處的能量則主要來源于恒星形成活動。
[Abstract]:Our neighbor in the universe of 33 infrared quasars in the sample collection, sorting from the high frequency X ray to low-frequency radio band the basic coverage of all the bands on the basis of data, and according to the optical, ultraviolet, infrared spectrum of various measurement results of existing (different instruments or by comparing year) with the test of some data to measure a variety of methods, to ensure real and effective numerical point. After extinction correction, aperture correction, wavelength and flux density from photometric redshift, normalized series, we obtain the spectral energy distribution of each source in the infrared QSO sample (SED) and their the average / median SED.
We studied samples of each source and the average spectral energy distribution and the starburst galaxies, quasars, ultraluminous infrared galaxies and optical quasars etc. (already at 1 m was found between normalized) infrared quasar SED between ulirg and optical quasars; at the same time it between the starburst galaxies and quasars: in the short wavelength (wavelength less than 1 m) optical quasars (quasars) spectrum is higher than that of infrared quasars and ultraluminous infrared Galaxy (starburst galaxies) is low; in the long wavelength of the situation is just the opposite. On the one hand that the star bursts and active galactic nuclei radiation is the main energy source of infrared quasars, but these two kinds of energy sources in different wavelength distribution. On the other hand, this results in full band energy distribution point of view that the infrared quasar is a kind of medium in the evolution of the source, they It is the intermediate process of the evolution of extremely bright infrared galaxies to optical quasars.
As a further two possible mechanism leading energy contribution to the infrared radiation energy of the quasar proportion, we through the starburst galaxy and Quasar template template linear superposition way fitting the average / infrared QSO sample median SED. results showed that the high frequency in the infrared quasars, quasars contribute more energy and low frequency; the energy comes from the star formation activity.

【學(xué)位授予單位】：天津師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：P158

【共引文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 彭志欣;活動星系核發(fā)射線的物理性質(zhì)[D];南京大學(xué);2013年

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本文編號：1365917