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SUPERNOVA REMNANTS AND MOLECULAR CLOUDS.

HUANG, YI-LONG.

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SUPERNOVA REMNANTS AND MOLECULAR CLOUDS.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	SUPERNOVA REMNANTS AND MOLECULAR CLOUDS./
作者:	HUANG, YI-LONG.
面頁冊數:	197 p.
附註:	Source: Dissertation Abstracts International, Volume: 46-08, Section: B, page: 2693.
Contained By:	Dissertation Abstracts International46-08B.
標題:	Physics, Astronomy and Astrophysics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8523181

SUPERNOVA REMNANTS AND MOLECULAR CLOUDS.
HUANG, YI-LONG.

SUPERNOVA REMNANTS AND MOLECULAR CLOUDS. - 197 p.

Source: Dissertation Abstracts International, Volume: 46-08, Section: B, page: 2693.

Thesis (Ph.D.)--Columbia University, 1985.

Since reliable, direct estimates of the distances to SNR's are generally unavailable, associated objects of known distance may provide a good indicator. Although the study of extragalactic SNe suggests that Type II remnants tend to occur near large optical Population-I objects, their detection in our Galaxy is limited by heavy local obscuration. Large molecular clouds, which occur near most optical Population-I objects and are detectable up to great distances, are probably the most plausible objects to search for an association with galactic SNR's. Our CO survey toward 26 SNR's (every known SNR from = 70(DEGREES) to 210(DEGREES) and beyond the solar circle) found that roughly half of them revealed a spatial coincidence with large clouds; most of these coincidences are probably associations, because it is statistically improbable that they result from chance superposition. We use such associations to re-calibrate the (SIGMA)-D relation and establish a good distance scale (a standard deviation of 28% for the uncertainty of a predicted distance) for the shell-like SNR's resultant from Type II events.Subjects--Topical Terms:

1019521
Physics, Astronomy and Astrophysics.

SUPERNOVA REMNANTS AND MOLECULAR CLOUDS.
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520 $a Since reliable, direct estimates of the distances to SNR's are generally unavailable, associated objects of known distance may provide a good indicator. Although the study of extragalactic SNe suggests that Type II remnants tend to occur near large optical Population-I objects, their detection in our Galaxy is limited by heavy local obscuration. Large molecular clouds, which occur near most optical Population-I objects and are detectable up to great distances, are probably the most plausible objects to search for an association with galactic SNR's. Our CO survey toward 26 SNR's (every known SNR from = 70(DEGREES) to 210(DEGREES) and beyond the solar circle) found that roughly half of them revealed a spatial coincidence with large clouds; most of these coincidences are probably associations, because it is statistically improbable that they result from chance superposition. We use such associations to re-calibrate the (SIGMA)-D relation and establish a good distance scale (a standard deviation of 28% for the uncertainty of a predicted distance) for the shell-like SNR's resultant from Type II events.
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650 4 $a Physics, Astronomy and Astrophysics. $3 1019521
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