A high-resolution rotation curve of NGC 6822
نویسندگان
چکیده
منابع مشابه
High Resolution Observations of the Near - Infrared Emission from NGC 6822 Hubble
We observed Hubble V, the brightest HII region complex in the dwarf irregular galaxy NGC 6822, at near-infrared (1.8–2.4 μm) wavelengths using the Cooled Grating Spectrometer 4 (CGS4) at the United Kingdom Infra-Red Telescope (UKIRT). The line emission maps of Hubble V show the typical structure of a photo-dissociation region (PDR) where an ionized core, traced by compact He I emission (2.0587 ...
متن کاملThe Star Formation History of NGC 6822
Images of five fields in the Local Group dwarf irregular galaxy NGC 6822 obtained with the Hubble Space Telescope in the F555W and F814W filters are presented. Three of the fields lie mostly within the central bar of NGC 6822 where most of the sites of current star formation are concentrated while two other fields sample more of the outer regions of the galaxy. Photometry for the stars in these...
متن کاملA Local Group Polar Ring Galaxy : NGC 6822
Star counts, obtained from a 2 × 2 degree area centered on NGC 6822 have revealed an optical image of this galaxy composed of two components: in addition to the well-known HI disk with its young stellar component, there is a spheroidal stellar structure as extensive as its HI disk but with its major axis at roughly right angles to it which we traced to at least 9 scale lengths. Radial velocitie...
متن کاملPhotometric Survey of the Polar Ring Galaxy Ngc 6822
We have previously established, from a carbon star survey, that the Local Group dwarf irregular galaxy NGC 6822 is much larger than its central bright core.
متن کاملGalaxy NGC 6822 from Near - Infrared Photometry of Cepheid Variables
We have measured near-infrared magnitudes in the J and K bands for 56 Cepheid variables in the Local Group galaxy NGC 6822 with well-determined periods and optical light curves in the V and I bands. Using the template light curve approach of Soszyński, Gieren and Pietrzyński, accurate mean magnitudes were obtained from these data which allowed us to determine with unprecedented accuracy the dis...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2004
ISSN: 0074-1809
DOI: 10.1017/s007418090018369x