Is there a way to convert distance modulus to get H(z) values

  • Context: Graduate 
  • Thread starter Thread starter fab13
  • Start date Start date
  • Tags Tags
    Convert Modulus
Click For Summary

Discussion Overview

The discussion centers around the conversion of distance modulus values into Hubble parameter values as a function of redshift, H(z). Participants explore the relationship between distance modulus and H(z), with a focus on numerical conversion methods and the necessary data for such conversions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the possibility of converting distance modulus values into H(z) data, seeking any relevant relationships.
  • Another participant points out that while converting distance modulus to distance is straightforward, redshift data is essential for plotting a Hubble curve.
  • The original poster acknowledges that their data is in distance_modulus(z) form, indicating a need to convert this to H(z) values.
  • A later reply mentions that redshifts are not fixed frequencies but rather fractions of the original frequency, suggesting a complexity in the relationship between redshift and distance modulus.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the methods for conversion or the necessary data, indicating that multiple competing views and uncertainties remain in the discussion.

Contextual Notes

There is an implied dependence on the availability of redshift data for the conversion process, and the discussion does not resolve the mathematical steps required for the conversion from distance modulus to H(z).

fab13
Messages
300
Reaction score
7
TL;DR
I have a set of distance modulus and I would like to know if this is possible to convert these values into a Hubble vs redshift H(z) data ( with the standard deviation)
Hello,

Everything is in th summary :

I have a set of distance modulus and I would like to know if this is possible to convert numerically these values into a Hubble vs redshift H(z) data ( with the standard deviation).

Any relation between distance modulus and H(z) are welcome.

Regards
 
Space news on Phys.org
It's easy to convert distance modulus to distance. See this Wikipedia page for example. But do you also have redshift for these objects? How can you plot a Hubble curve without redshift data?
 
@phyzguy

Of course, I forgot to mention that data are not in H(z) space but distance_modulus(z)

that's why I would like to handle them to get H(z) data

Thanks
 
Redshifts are not in a fixed number of Hz. They are fractions of the original frequency,
 

Similar threads

Graduate Published data sets for distance modulus versus redshift
  • · Replies 5 ·
Replies
5
Views
5K
High School What value of z (redshift) equals apparent superluminal recession?
  • · Replies 28 ·
Replies
28
Views
3K
High School The distance to the nearest identical Hubble volume in light years?
  • · Replies 50 ·
2
Replies
50
Views
7K
Graduate Forecast with Fisher formalism : loss or gain of information
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Lightcone 1.0 basic redshift article development
  • · Replies 14 ·
Replies
14
Views
4K
Graduate Concordance value of Hubble growth rate (2014)
  • · Replies 3 ·
Replies
3
Views
3K
Graduate The LCDM Cosmological Model in Simplified Math
  • · Replies 7 ·
Replies
7
Views
3K
Experiment measuring the distance dependence of a suspended metal bolt from a magnet
  • · Replies 13 ·
Replies
13
Views
1K
Graduate Dark Energy Evolution: Is $\Lambda$CDM Model the Best?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Distance between two uncertain points using haversine?
  • · Replies 12 ·
Replies
12
Views
3K