منابع مشابه
A detailed study of the ringed galaxy NGC 3344 ?
We study the relatively isolated galaxy NGC 3344, classified as SABbc, as part of our study of ringed isolated non-barred galaxies. This galaxy shows an inner and an outer ring, together with a small bar inside the inner ring. This bar is too small to relate it directly to the formation of the outer ring and we explore here its origin through HI (WSRT) line data together with broad band BR CCD-...
متن کاملNon - Circular Gas Kinematics and Star Formation in the Ringed Galaxy Ngc 4736
We analyze the gas kinematics and star formation properties of the nearby RSab galaxy NGC 4736 using interferometric and single-dish CO(1-0) data and previously published Hα and H I data. The CO morphology is dominated by a central molecular bar and tightly wound spiral arms associated with a bright ring of star formation. Strong H I emission is also found in the ring, but H I is absent from th...
متن کاملRadial Gas Flows and Star Formation in the Ringed Galaxy NGC 4736
We analyze the gas kinematics and star formation properties of the nearby RSab galaxy NGC 4736 using interferometric and single-dish CO(1-0) data and previously published Hα and H I data. The CO morphology is dominated by a central molecular bar and tightly wound spiral arms corresponding to a bright ring of star formation. Strong H I emission is also found in the ring, but H I is absent from t...
متن کاملNebular gas abundances and mixing processes in the ringed galaxy NGC 4736 ?
Results of imaging spectrophotometry in the nebular lines Hα, Hβ, [O iii] λ5007 and [N ii] λ6584 of 65 H ii regions in the early-type ringed galaxy NGC 4736 are presented. The oxygen abundance is derived using the line ratios [O iii]/Hβ and [N ii]/[O iii] as calibrated by Edmunds & Pagel (1984). Analysis of the O/H distribution in the bright resonance ring of star formation in NGC 4736 reveals ...
متن کاملX - ray emission from the Sculptor galaxy NGC 300
We report here the results of a full analysis of all the ROSAT PSPC spectral imaging observations and all the ROSAT HRI high resolution imaging observations of the very nearby (D = 2.1 Mpc) Sculptor galaxy, NGC 300. Many point sources are detected within the field, several of them showing evidence for variability, and we present full source lists detailing their X-ray properties, and attempt to...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1990
ISSN: 0252-9211
DOI: 10.1017/s025292110000508x