Errors with calculating the primordial bispectrum using CAMB

Use of Cobaya. camb, CLASS, cosmomc, compilers, etc.
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Yan jian
Posts: 2
Joined: January 14 2024
Affiliation: Yunnan University

Errors with calculating the primordial bispectrum using CAMB

Post by Yan jian » January 22 2024

Hi,

I encountered some errors while using CAMB to calculate the primordial bispectrum. I'd be really grateful if someone could help me.

To calculate the primordial bispectrum, I started by modifying the default params.ini on the following four lines:
do_primordial_bispectrum = T
bispectrum_slice_base_L = 2
bispectrum_full_output_file=bispectrum
bispectrum_full_output_sparse=T

But CAMB comes back with:

Code: Select all

 (base) chaofan@chaofan:~/CAMB/fortran$ ./camb ../bispectrum/planck_2018.ini
Reion redshift       =   7.680
Om_b h^2             =  0.022383
Om_c h^2             =  0.120108
Om_nu h^2            =  0.000645
Om_darkenergy        =  0.684097
Om_K                 =  0.000000
Om_m (inc Om_u)      =  0.315823
100 theta (CosmoMC)  =  1.040896
N_eff (total)        =  3.046000
 1 nu, g= 1.0153 m_nu*c^2/k_B/T_nu0=    356.54 (m_nu=  0.060 eV)
Reion opt depth      =  0.0543
Age of universe/GYr  =  13.797
zstar                =  1089.91
r_s(zstar)/Mpc       =  144.40
100*theta            =  1.041098
DA(zstar)/Gpc        =  13.86965
zdrag                =  1059.97
r_s(zdrag)/Mpc       =  147.05
k_D(zstar) Mpc       =  0.1409
100*theta_D          =  0.160736
z_EQ (if v_nu=1)     =  3405.08
k_EQ Mpc (if v_nu=1) =  0.010393
100*theta_EQ         =  0.812803
100*theta_rs_EQ      =  0.449131
tau_recomb/Mpc       =  280.53  tau_now/Mpc =  14150.1
 getting reduced local fnl bispectra
 Error creating file : CESHI_








                                                                                             bispectrum_fnl.dat
Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL
ERROR STOP

Error termination. Backtrace:
#0  0x7fdfcc801d4a
#1  0x7fdfcc802859
#2  0x7fdfcc803f87
#3  0x55805d7287f8
#4  0x55805d732ebb
#5  0x55805d732a73
#6  0x55805d72d5bc
#7  0x55805d6ed9aa
#8  0x55805d664079
#9  0x55805d667cde
#10  0x55805d6687d7
#11  0x55805d65a624
#12  0x7fdfcc43b082
#13  0x55805d65a73d
#14  0xffffffffffffffff
Any light that anyone can shed on this would be really helpful. Thanks.

Antony Lewis
Posts: 1943
Joined: September 23 2004
Affiliation: University of Sussex
Contact:

Re: Errors with calculating the primordial bispectrum using CAMB

Post by Antony Lewis » January 22 2024

Don't know, looks like some string is not being trimmed. Can investigate around line 760 of SeparableBispectrum.f90

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