totalStarFormationRate units

[AlexGKim]

Hi, I would like to confirm the units of the cosmoDC2_v1.0 catalog's native quantity totalStarFormationRate. In a previous discussion it was stated that it was it was 10 M_star/yr. The numbers I see are 1 to 1e10, which seems to high for these units.

[dkorytov]

I'll double check the units, but I'm pretty sure it's M_star/Gyr.

[aphearin]

@AlexGKim - The galaxyProperties/totalStarFormationRate column is a native quantity in Galacticus. It looks to me like the distribution is in Msun/Gyr, based on the numerical values, but either @abensonca and/or @evevkovacs should confirm exactly what is tabulated.

[abensonca]

Yes, Msun/Gyr is correct

--

• Andrew Benson: http://users.obs.carnegiescience.edu/abenson/contact.html

• Galacticus: http://sites.google.com/site/galacticusmodel

On Mon, Sep 24, 2018, 11:20 AM Andrew Hearin notifications@github.com wrote:

@AlexGKim https://github.com/AlexGKim - The galaxyProperties/totalStarFormationRate column is a native quantity in Galacticus. It looks to me like the distribution is in Msun/Gyr, based on the numerical values, but either @abensonca https://github.com/abensonca and/or @evevkovacs https://github.com/evevkovacs should confirm exactly what is tabulated.

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[evevkovacs]

@AlexGKim Note however that there are several native quantities related to star-formation rate: ['totalStarFormationRate', 'baseDC2/sfr_percentile', 'baseDC2/obs_sfr_percentile', 'baseDC2/sfr', 'diskStarFormationRate', 'baseDC2/obs_sfr', 'spheroidStarFormationRate']. The "baseDC2/*" come from the baseline empirical model that is used to predict the rest-frame magnitudes and colors. These are matched to the corresponding Galacticus quantities to select galaxies from the Galacticus library. The properties of these selected galaxies are used to fill out the properties of each baseline-model galaxy. We have not checked how well the Galacticus totalStarFormationRate matches the baseDC2/sfr.

[AlexGKim]

Thanks for the information! I should be good.