- #1
jl294
- 5
- 0
Reading through various publications for Luminosity Functions and it mentions completeness a lot without ever explaining what it actually is. Could someone shed light on this please?
Thanks
Thanks
'completeness' refers to how accurately collected data reflects the actual distribution of sources. Any astronomical survey will only detect the objects which are above the limiting brightness of the telescope/survey---everything dimmer, will not be seen. Therefore, anytime you're analyzing the statistics of your sample, you have to consider the 'completeness' of the survey---i.e. what types of sources (and how many) were detected, compared to what sources (and how many) weren't detected.jl294 said:Reading through various publications for Luminosity Functions and it mentions completeness a lot without ever explaining what it actually is. Could someone shed light on this please?
Consider using google.jl294 said:Also, what is 'K-correction'?
Galaxy completeness refers to the degree to which all galaxies in a particular region or sample have been observed or detected. It is a measure of how well we understand the properties and distribution of galaxies in the universe.
Galaxy completeness is important because it allows us to make accurate statistical analyses and draw conclusions about the properties of galaxies in a given region. Incomplete samples can lead to biased results and inaccurate conclusions about the nature of the universe.
Galaxy completeness is typically measured by comparing the number of observed galaxies to the number of expected galaxies in a particular region or sample. This can be done using various statistical methods and can also take into account factors such as the brightness and distance of the galaxies.
There are several factors that can affect galaxy completeness, including the sensitivity of the instruments used to observe galaxies, the depth and coverage of the observations, and the presence of any biases or selection effects in the sample.
Incomplete galaxy samples can lead to biased results and inaccurate conclusions about the properties of galaxies in a given region. This can also affect our understanding of the overall structure and evolution of the universe. Therefore, it is important to strive for high levels of galaxy completeness in scientific studies.