cosmoFns (version 1.1-1)

mass.CO: Molecular mass

Description

Compute molecular mass (default CO J = 1-0) from L' and empirical conversion factor.

Usage

mass.CO(intInt, z, alpha = 0.8, f.rest = 115.27, omega.m = 0.27,
omega.lambda = 0.73, H.0 = 71)

Arguments

intInt

Integrated intensity in Jy km/s

z

Redshift

alpha

Empirical mass conversion factor, see details

f.rest

Line rest frequency in GHz

omega.m

Omega matter parameter

omega.lambda

Omega lambda parameter

H.0

Hubble constant in km/s/Mpc

Value

Gas mass in solar masses.

Details

alpha is an empirical mass conversion factor. The exact value is a topic of considerable debate. For CO, see Solomon and Vanden Bout (2005), also Tacconi et al. (2008) for reviews.

References

Solomon, Downes & Radford (1992), ApJ 398, L29, equations (3) and (4); Solomon & Vanden Bout (2005) ARA&A 43, 677; Tacconi et al. (2008) ApJ 680, 246.

See Also

Lprime

Examples

# NOT RUN {
snu <- 1.e-3 # 1 mJy peak
wid <- 400   # 400 km/s wide
intInt <- 1.06*snu*wid  # Gaussian line
z <- 2.3
mass.CO(intInt, z)
# }