Neutron Stars mass and radii observation data

In summary, the conversation is about working on NS mass relations and plotting a curve with predicted masses-radii and observations on NS. The speaker encountered difficulties in plotting the .dat file from the downloaded .tar file and is seeking help from others. They also provide some information about the source, columns, and date of the data.
  • #1
Leonardo Machado
57
2
Hello everyone.
I'm currently working on NS mass relations and trying to plot a curve with predicted masses-radii and observations on NS.
There are some free data at this website: http://xtreme.as.arizona.edu/NeutronStars/index.php/neutron-star-radii/ . I downloaded the .tar file and tried to plot the .dat file. But the form of the file is not in columns and the plotting was not possible. Could you guys help me ?
 
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  • #2
Here are the first 15 (of the 22,506) lines in the file 'MRprob_1608.dat'. The .TAR file contains 14 .DAT files ranging in size from 102K to 878K. I'm on an old Windows machine and used the '7-ZIP' free software, https://www.7-zip.org to open the .TAR file.

===================================================
Source: 4U1608-52
Columns: Mass (Msolar) - Radius (km) - Posterior Likelihood
Date: February 2016
Cite: Ozel, F., et al. 2016, ApJ in press, arXiv:1505.05155
===================================================
6.000000e-01 4.000000e+00 2.361399e-15
6.194631e-01 4.000000e+00 4.413943e-15
6.389262e-01 4.000000e+00 8.099484e-15
6.583893e-01 4.000000e+00 1.461476e-14
6.778523e-01 4.000000e+00 2.597506e-14
6.973154e-01 4.000000e+00 4.554851e-14
7.167785e-01 4.000000e+00 7.893337e-14
7.362416e-01 4.000000e+00 1.354017e-13
7.557047e-01 4.000000e+00 2.302831e-13

Cheers,
Tom
 

1. What is the average mass of a neutron star?

The average mass of a neutron star is about 1.4 times the mass of our sun, or approximately 2.8 x 10^30 kilograms.

2. How are the masses of neutron stars measured?

The masses of neutron stars are measured using various techniques, such as analyzing the orbits of neutron stars in binary systems or studying the gravitational waves emitted by merging neutron stars.

3. Can the mass of a neutron star change over time?

Yes, the mass of a neutron star can change over time due to accretion of material from a companion star or through mergers with other neutron stars.

4. What is the typical radius of a neutron star?

The typical radius of a neutron star is about 10 kilometers, making them incredibly dense objects. However, the exact radius can vary depending on the mass and composition of the neutron star.

5. How does the mass and radius of a neutron star relate to its properties?

The mass and radius of a neutron star are closely related to its properties, such as its density, magnetic field strength, and rotational speed. These properties can provide valuable insights into the physics and behavior of neutron stars.

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