منابع مشابه
NGC 2580 and NGC 2588 : Two open clusters in the Third Galactic Quadrant ⋆ , ⋆ ⋆
We present CCD broad band photometric observations in the fields of the Third Galactic Quadrant open clusters NGC 2580 and NGC 2588 (V (I)C and UBV (RI)C respectively). From the analysis of our data we found that NGC 2580 is located at a distance of about 4 kpc and its age is close to 160 Myr. As for NGC 2588, it is placed at about 5 kpc from the Sun and is 450 Myr old. This means that NGC 2588...
متن کاملThe star - burst galaxies NGC 278 , NGC 660 , NGC 3628 , NGC 4631 , and NGC 4666
Aims. We study the physical properties and mass of molecular gas in the central regions of galaxies with active nuclei. GHz [CI] maps in three of these are used to model the molecular gas. Results. All five objects contain bright CO emission in the central regions. Clear central concentrations were found in NGC 660, NGC 3628, and NGC 4666, but not in the weakest CO emitters NGC 278 and NGC 4631...
متن کاملPhotometric and kinematic studies of open star clusters III . NGC 4103 , NGC 5281 , and NGC 4755 ⋆ , ⋆ ⋆
We present CCD photometry and proper motion studies of the three open star clusters NGC4103, NGC5281, and NGC4755 (κ Cru). By fitting isochrones to the colour magnitude diagrams, we found that all three objects are young open star clusters with ages of at most t = 45 Myr. They are located at distances from approx. 1600 pc to 2200 pc, derived from distance moduli (m−M)0 ranging from 11 mag to 12...
متن کاملNear - Infrared Spectroscopy of Molecular Hydrogen Emission in Four Reflection Nebulae : NGC 1333 , NGC 2023 , NGC 2068 , and NGC 7023
We present near-infrared spectroscopy of fluorescent molecular hydrogen (H2) emission from NGC 1333, NGC 2023, NGC 2068, and NGC 7023 and derive the physical properties of the molecular material in these reflection nebulae. Our observations of NGC 2023 and NGC 7023 and the physical parameters we derive for these nebulae are in good agreement with previous studies. Both NGC 1333 and NGC 2068 hav...
متن کاملMulticolor Ccd Photometry and Stellar Evolutionary Analysis of Ngc 1907, Ngc 1912, Ngc 2383, Ngc 2384, and Ngc 6709 Using Synthetic Color-magnitude Diagrams
We present the Ðrst CCD photometric observations of NGC 2383 and NGC 2384 in B, V , R, and I, NGC 1912, NGC 6709 in B, V , and I and NGC 1907 in B and V passbands, reaching down to a limiting magnitude of V D 20 mag for D3300 stars put together. The results of the spectroscopic observations of 43 bright stars in the Ðeld of NGC 1912, NGC 2383, NGC 2384, and NGC 6709 are also presented. The colo...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2004
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20034427