Galactic elements Q-Matrix generator
Project description
Intergalactic is a Q-Matrix generator.
Based on explicit values for solar abundances, z and IMF, Intergalactic calculates matrices Q(i,j) of masses of elements i ejected to the galactic medium as element j, for a complete range of stellar masses, accounting for supernovas of types Ia and Ib.
Intergalactic computes the contribution matrix of 15 elements:
H |
D |
He3 |
He4 |
C |
C13 |
N |
O |
n.r. |
Ne |
Mg |
Si |
S |
Ca |
Fe |
Installation
The easiest way to install the package is using pip:
$ pip install intergalactic
This will also install some dependencies if they are not found in the system: numpy, scipy and yaml
Usage
Use intergalactic running:
$ intergalactic --config FILENAME
where FILENAME is the path to the config yaml file.
Running intergalactic will produce a directory with three output files:
mass_intervals: all the mass intervals used to integrate for all the mass range
imf_supernova_rates: the initial mass functions for the supernova rates for each mass interval
qm-matrices: the Q(m) matrices for every mass interval defined in the mass_intervals file
Input params
Intergalactic reads a config file where several options can be set in yaml format:
z: 0.0200 # metallicity sol_ab: ag89 # solar abundances imf: kroupa # initial mass function (IMF) imf_m_low: 0.15 # lower mass limit for the IMF imf_m_up: 100 # upper mass limit for the IMF total_time_steps: 300 # number of time steps (will result in a Q Matrix per step) m_min: 0.98 # min value for stellar mass m_max: 40 # max value for stellar mass binary_fraction: 0.05 # rate of binary stars dtd_sn: rlp # delay time distribution for supernovas
Intergalactic will use its internal default values for all params for which no values are provided.
If you want to use an existent configuration file as template for your own, you can run:
$ intergalactic --generate-config
That command will create a config-example.yml file in the current dir.
Initial mass function
The imf param in the config file can be set to use any of the predefined IMFs from different papers/authors:
- salpeter:
Salpeter 1955
- starburst:
Starburst 1999 (a Salpeter with mass limits in [1, 120])
- miller_scalo:
Miller & Scalo 1979
- ferrini:
Ferrini, Palla & Penco 1998
- kroupa:
Kroupa 2002
- chabrier:
Chabrier 2003
- maschberger:
Maschberger 2012
The default value is kroupa. If you want to use your own IMF you can do so subclassing the IMF class.
The IMF will be normalized integrating in the [imf_m_low, imf_m_up] mass interval (default: [0.15, 100], except Starburst: [1, 120]).
Solar abundances
The sol_ab param in the config file can be set to use any of the available abundances datasets from different papers/authors:
- ag89:
Anders & Grevesse 1989
- gs98:
Grevesse & Sauval 1998
- as05:
Asplund et al. 2005
- as09:
Asplund et al. 2009
- he10:
Heger 2010
The default value is as09. If you want to use your own abundances data you can do so subclassing the Abundances class.
Delay Time Distributions
The dtd_sn param in the config file can be set to use any of the available Delay Time Distributions for supernova rates from different papers/authors:
- rlp:
Supernova rates from Pilar Ruiz-Lapuente
- mdvp:
DTD from Mannucci, Della Valle, Panagia 2006
License
Copyright © 2019 Juanjo Bazán, released under the MIT license.
Credits
Intergalactic is built upon a long list of previous works from different authors/papers:
Ferrini et al.,1992, ApJ, 387, 138
Ferrini & Poggiantti, 1993, ApJ, 410, 44F
Portinari, Chiosi & Bressan.,1998,AA,334,505P
Galli et al., 1995, ApJ, 443, 536G
Mollá et al, 2015, MNRAS, 451, 3693-3708
Iwamoto et al, 1999, ApJS, 125, 439
Matteucci & Greggio, 1986, A&A, 154, 279M
Mollá et al, 2017, MNRAS, 468, 305-318
Gavilan, Mollá & Buell, 2006, A&A, 450, 509
Raiteri C.M., Villata M. & Navarro J.F., 1996, A&A 315, 105-115
Mannucci, Della Valle, Panagia (2006)
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Source Distribution
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| BLAKE2b-256 | f3d6b5125db7412b1db0d1bc08216a2907f4aeac83480e6a479e85b935bf293a |
