ASCA X-Ray Observations of the NGC 2023 and NGC 2024 Regions

Yamauchi Shigeo; Kamimura Reiko; Koyama Katsuji

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ASCA X-Ray Observations of the NGC 2023 and NGC 2024 Regions

机译：NSCA 2023和NGC 2024区域的ASCA X射线观察

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ThispaperpresentsthepropertiesofX-raysourcesintheregionsofNGC2023andNGC2024observedwithASCA.Wefound14point-likesourcesintheNGC2023field.IntheNGC2024field,ontheotherhand,wefoundextendedX-rayemissioninthecentraldustlaneofNGC2024,andresolved5point-likesourcesaroundthenebula.FromthepositionalcoincidenceandmoderatecolumndensityofNHa??1.6?—1022Hcma?’2,theextendedsourceismostlyattributabletoanintegratedemissionfromX-rayemittingyoungstellarobjects(YSOs)foundwithROSAT.However,theplasmatemperatureofa??4keVishigherthantheROSATresultsaswellasthoseofusualYSOs.Possiblecounterpartshavebeenfoundfortheotherresolvedsources,excepttwo;onehaslargeabsorptionatlowenergiesandtheotherhasmoderateabsorption.Theplasmatemperaturesandluminositiesfromthepointsources,exceptforanO-typestar??OriandastarexhibitingX-rayflares,areestimatedtobea??1-5keVand1030.6a?’1031.5ergsa?’1inthe0.5a?’10.0keVenergyband(assumingthedistanceof400pc),respectively.WefoundnoX-raypeakatthepositionofaClass0protostar,NGC2023-MM1.

机译：？ThispaperpresentsthepropertiesofX-raysourcesintheregionsofNGC2023andNGC2024observedwithASCA.Wefound14point-likesourcesintheNGC2023field.IntheNGC2024field，ontheotherhand，wefoundextendedX-rayemissioninthecentraldustlaneofNGC2024，andresolved5point-likesourcesaroundthenebula.FromthepositionalcoincidenceandmoderatecolumndensityofNHa ?? 1.6 -1022Hcma'2，theextendedsourceismostlyattributabletoanintegratedemissionfromX-rayemittingyoungstellarobjects（YSOs）foundwithROSAT.However，theplasmatemperatureofa ?? 4keVishigherthantheROSATresultsaswellasthoseofusualYSOs.Possiblecounterpartshavebeenfoundfortheotherresolvedsources，excepttwo;从点光源的等离子温度和发光度，除了O型恒星显示的X射线耀斑外，估计为大约1-5keV和1030.6a到'1031.5ergsa？'1，在0.5mm到1,400kex的X射线中，大约1 keke的能量带（大约10.0keV的能量带）被认为是一个低能量吸收。

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《PASJ: Publications of the Astronomical Society of Japan》 |2000年第6期|共页
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Yamauchi Shigeo; Kamimura Reiko; Koyama Katsuji;
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2. The X-Ray Spectra and Spectral Variability of Intermediate-Type Seyfert Galaxies: ASCA Observations of NGC?4388 and ESO?103-G35 [J] . Karl Forster12, Karen M. Leighly1, Laura E. Kay3 The Astrophysical journal . 2009,第2期

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3. Chandra and ASCA X-Ray Observations of the Type II-L Supernova SN 1979C in NGC 4321 [J] . A. Ray14, R. Petre2, E. M. Schlegel3 The Astrophysical journal . 2007,第2期

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6. A Census of X-ray gas in NGC 1068: Results from 450ks of Chandra HETG Observations [O] . T. Kallman, Daniel A. Evans, H. Marshall, -1

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8. Understanding the Puzzling X-Ray Spectrum of the SO Galaxy NGC 4382; NGC 43819: Spectral Analysis of the Prototypical Early Merger and ASCA Observations of a Dynamically Young Elliptical: NGC 4125 [R] . Fabbiano, Giuseppina 2001

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ASCA X-Ray Observations of the NGC 2023 and NGC 2024 Regions

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