منابع مشابه
The Stellar Populations of NGC 3109: Another Dwarf Irregular Galaxy with a Population II Stellar Halo
We have obtained V and I-band photometry for about 17500 stars in the field of the dwarf irregular galaxy NGC 3109, located in the outskirts of the Local Group. The photometry allows us to study the stellar populations present inside and outside the disk of this galaxy. From the VI color-magnitude diagram we infer metallicities and ages for the stellar populations in the main body and in the ha...
متن کاملThe ultraluminous X-ray source NGC 1313 X-2
NGC 1313 X-2 is one of the brightest ultraluminous X-ray sources in the sky, at both X-ray and optical wavelengths; therefore, quite a few studies of available ESO VLT and HST data have appeared in the literature. Here, we present our analysis of VLT/FORS1 and HST/ACS photometric data, confirming the identification of the B ∼ 23 mag blue optical counterpart. We show that the system is part of a...
متن کامل3 Resolving the Stellar Population of the Standard Elliptical Galaxy NGC 3379
Using the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) on board the Hubble Space Telescope, we have obtained F110W (∼ J) and F160W (∼ H) images of three fields in NGC3379, a nearby normal giant elliptical galaxy. These images resolve individual red giant stars, yielding the first accurate color-magnitude diagrams for a normal luminous elliptical. The photometry reaches ∼ 1 magnit...
متن کاملM ar 1 99 8 The Resolved Stellar Population of the Post - Starburst Galaxy NGC 1569
We present WFPC2–HST photometry of the resolved stellar population in the post-starburst galaxy NGC 1569. The color-magnitude diagram (CMD) derived in the F439W and F555W photometric bands contains ∼2800 stars with photometric error ≤ 0.2 mag down to mF439, mF555 ≃ 26, and is complete for mF555 ∼ < 23. Adopting the literature distance modulus and reddening, our CMD samples stars more massive th...
متن کاملof the stellar populations in the cometary dwarf irregular galaxy NGC 2366
We present V and I photometry of the resolved stars in the cometary dwarf irregular galaxy NGC 2366, using Wide Field Planetary Camera 2 images obtained with the Hubble Space Telescope. The resulting color-magnitude diagram reaches down to I ∼ 26.0 mag. It reveals not only a young population of blue main-sequence stars (age . 30 Myr) but also an intermediate-age population of blue and red super...
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ژورنال
عنوان ژورنال: Astronomy Letters
سال: 2016
ISSN: 1063-7737,1562-6873
DOI: 10.1134/s1063773716070082