Galaxy photometry. I. Techniques
نویسندگان
چکیده
منابع مشابه
Galaxy Photometry in the Cluster Shakhbazian I
Newly obtained photoelectric V magnitudes for three galaxies in Shakhbazian I, when combined with the virial analysis of Robinson and Wampler, show that the cluster mass-to-luminosity ratio is WL ~ 4. The first brightest galaxy in the cluster (an elliptical) has (U—B) and (B—V) color indices which are consistent with those of normal ellipticals in the Virgo and Coma clusters, and it is suggeste...
متن کاملThe Iras Bright Galaxy Sample. v. Multibeam Photometry of Galaxies
Forty-seven galaxies from the IRAS Bright Galaxy Sample with infrared luminosities Lm > 10 1 Lq have been measured at 1.3, 1.65, and 2.2 ¡im with beam diameters of 17", 33", and 55". These measurements, combined with 5" and 10" observations presented in an earlier paper, provide an opportunity to study the spatial distribution of the near-infrared emission in luminous IRAS galaxies. It is found...
متن کاملSpiral galaxy distance indicators based on near-infrared photometry
We compare two methods of distance determination to spiral galaxies using optical/near-infrared (NIR) observations, the (I–K) versus MK colour – absolute magnitude (CM) relation and the I and K-band Tully-Fisher relation (TFR). Dust-free colours and NIR absolute magnitudes greatly enhance the usefulness of the NIR CM relation as a distance indicator for moderately to highly inclined spiral gala...
متن کاملReconstructing Galaxy Spectral Energy Distributions from Broadband Photometry
We present a novel approach to photometric redshifts, one that merges the advantages of both the template fitting and empirical fitting algorithms, without any of their disadvantages. This technique derives a set of templates, describing the spectral energy distributions of galaxies, from a catalog with both multicolor photometry and spectroscopic redshifts. The algorithm is essentially using t...
متن کاملHST photometry of globular clusters in the Sombrero galaxy ⋆
We explore the rich globular cluster (GC) system of the nearby Sa galaxy M104, the “Sombrero” (NGC 4594), using archive WFPC2 data. The GC colour distribution is found to be bimodal at the > 99% confidence level, with peaks at (V −I)0 = 0.96±0.03 and 1.21±0.03. The inferred metallicities are very similar to those of globular clusters in our Galaxy and M31. However the Sombrero reveals a much en...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1973
ISSN: 0004-6256
DOI: 10.1086/111460