We are attempting to construct merger trees of the specific black holes using the supplementary catalogue, and start out by searching using the id_out dataset from the mergers file for the input ID until it needs to switch to another.
In this case, for TNG300-3, with the black hole ID 100370206805, we found that it appears not to undergo any more mergers before snapshot 69, but here it has a mass going into the merger of 2.4e-4, instead of the seed mass of 8e-05. I just wanted to double-check, are these masses also taking accretion into account here, not just the merger masses?
Hi Kate, yes that's right - the BH masses increase due to accretion so it's typical for them to have grown a bit before their first merger. Let me know if you have any other questions!
Best,
Luke
Kate Attard
12 Apr '21
Hi Luke,
Thank you for your response, that's good to know.
I had a follow-up question, which is that a number of the BH mergers have a resultant mass and/or a 'out' BH mass of 0. Here I'm again looking at the TNG300-3 BHs. Is this just missing data?
Hi,
We are attempting to construct merger trees of the specific black holes using the supplementary catalogue, and start out by searching using the id_out dataset from the mergers file for the input ID until it needs to switch to another.
In this case, for TNG300-3, with the black hole ID 100370206805, we found that it appears not to undergo any more mergers before snapshot 69, but here it has a mass going into the merger of 2.4e-4, instead of the seed mass of 8e-05. I just wanted to double-check, are these masses also taking accretion into account here, not just the merger masses?
Thank you,
Kate
Hi Kate, yes that's right - the BH masses increase due to accretion so it's typical for them to have grown a bit before their first merger. Let me know if you have any other questions!
Best,
Luke
Hi Luke,
Thank you for your response, that's good to know.
I had a follow-up question, which is that a number of the BH mergers have a resultant mass and/or a 'out' BH mass of 0. Here I'm again looking at the TNG300-3 BHs. Is this just missing data?
Thank you,
Kate