Kinematic analysis of Sculptor Group galaxies
نویسندگان
چکیده
منابع مشابه
ISM Abundances in Sculptor Group Dwarf Irregular Galaxies
Using the CTIO 4-m telescope, we have obtained optical spectra of HII regions in five Sculptor Group dwarf irregular galaxies. We derive oxygen, nitrogen, and sulfur abundances from the HII region spectra. Oxygen abundances are derived via three different methods (the “direct” method, the empirical method guided by photoionization modeling of McGaugh (1991), and the purely empirical method of P...
متن کاملStar Formation in Sculptor Group Dwarf Irregular Galaxies and the Nature of “Transition” Galaxies
We present new Hα narrow band imaging of the HII regions in eight Sculptor Group dwarf irregular (dI) galaxies. The Hα luminosities of the detected HII regions range from some of the faintest detected in extragalactic HII regions (∼ 10 erg s in SC 24) to some of the most luminous (∼ 10 erg s in NGC 625). The total Hα luminosities are converted into current star formation rates (SFR). Comparing ...
متن کاملDistances to Nearby Galaxies in Sculptor ⋆
We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a typical accuracy of ∼ 12 %. Their distances are 4.21 Mpc (Sc 22), 4.92 Mpc (DDO 226), 3.94 Mpc (NGC 253), 3.40 Mpc (KDG 2), 3.34 Mpc (DDO 6), 3.42 Mpc (ESO 540-030), 4.43 Mpc (ESO 245–05), 4.27 Mpc (UGCA ...
متن کاملDetection of neutral hydrogen in early-type dwarf galaxies of the Sculptor Group
We present our results of deep 21 cm neutral hydrogen (Hi) line observations of five early and mixed-type dwarf galaxies in the nearby Sculptor group using the ATNF 64m Parkes Radio Telescope. Four of these objects, ESO294-G010, ESO410-G005, ESO540-G030, and ESO540-G032, were detected in Hi with neutral hydrogen masses in the range of 2− 9× 10 M⊙ (MHI/LB = 0.08, 0.13, 0.16, and 0.18 M⊙/L⊙, resp...
متن کاملSpectroscopy of Globular Cluster Candidates in the Sculptor Group Galaxies NGC 253 and NGC 55
We have obtained spectra for 103 published globular cluster candidates in the Sculptor Group galaxies NGC 253 and NGC 55. On the basis of radial velocities and digitized plate images, 14 globular clusters are identified in NGC 253 and one probable globular cluster is identified in NGC 55. The majority of the objects in the sample appear to be background galaxies. We have obtained and analysed C...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2000
ISSN: 0252-9211
DOI: 10.1017/s0252921100054750