public class Fluxes
extends java.lang.Object
Some constants for approximate conversions between different magnitude scales are also provided:
JOHNSON_AB_*
, for Johnson <-> AB magnitude
conversions, from
Frei and Gunn, Astronomical Journal 108, 1476 (1994),
Table 2
(1994AJ....108.1476F).
VEGA_AB_*
, for Vega <-> AB magnitude
conversions, from
Blanton et al., Astronomical Journal 129, 2562 (2005),
Eqs. (5)
(2005AJ....129.2562B).
Modifier and Type | Field | Description |
---|---|---|
static double |
JOHNSON_AB_B |
Approximate offset between Johnson and AB magnitudes in B band.
|
static double |
JOHNSON_AB_Bj |
Approximate offset between Johnson and AB magnitudes in Bj band.
|
static double |
JOHNSON_AB_g |
Approximate offset between Johnson and AB magnitudes in g band.
|
static double |
JOHNSON_AB_gPrime |
Offset between Johnson and AB magnitudes in g' band (zero).
|
static double |
JOHNSON_AB_i |
Approximate offset between Johnson and AB magnitudes in i band.
|
static double |
JOHNSON_AB_I |
Approximate offset between Johnson and AB magnitudes in I band.
|
static double |
JOHNSON_AB_Ic |
Approximate offset between Johnson and AB magnitudes in Ic band.
|
static double |
JOHNSON_AB_iPrime |
Offset between Johnson and AB magnitudes in i' band (zero).
|
static double |
JOHNSON_AB_r |
Approximate offset between Johnson and AB magnitudes in r band.
|
static double |
JOHNSON_AB_R |
Approximate offset between Johnson and AB magnitudes in R band.
|
static double |
JOHNSON_AB_Rc |
Approximate offset between Johnson and AB magnitudes in Rc band.
|
static double |
JOHNSON_AB_rPrime |
Offset between Johnson and AB magnitudes in r' band (zero).
|
static double |
JOHNSON_AB_uPrime |
Offset between Johnson and AB magnitudes in u' band (zero).
|
static double |
JOHNSON_AB_V |
Approximate offset between Johnson and AB magnitudes in V band.
|
static double |
JOHNSON_AB_zPrime |
Offset between Johnson and AB magnitudes in z' band (zero).
|
static double |
VEGA_AB_H |
Approximate offset between Vega (as in 2MASS) and AB magnitudes
in H band.
|
static double |
VEGA_AB_J |
Approximate offset between Vega (as in 2MASS) and AB magnitudes
in J band.
|
static double |
VEGA_AB_K |
Approximate offset between Vega (as in 2MASS) and AB magnitudes
in K band.
|
Modifier and Type | Method | Description |
---|---|---|
static double |
abToJansky(double magAB) |
Converts AB magnitude to flux in Jansky.
|
static double |
fluxToLuminosity(double flux,
double dist) |
Converts flux to luminosity given a luminosity distance.
|
static double |
janskyToAb(double fluxJansky) |
Converts flux in Jansky to AB magnitude.
|
static double |
luminosityToFlux(double lumin,
double dist) |
Converts luminosity to flux given a luminosity distance.
|
public static final double JOHNSON_AB_V
JOHNSON_AB_V
.public static final double JOHNSON_AB_B
JOHNSON_AB_B
.public static final double JOHNSON_AB_Bj
JOHNSON_AB_Bj
.public static final double JOHNSON_AB_R
JOHNSON_AB_R
.public static final double JOHNSON_AB_I
JOHNSON_AB_I
.public static final double JOHNSON_AB_g
JOHNSON_AB_g
.public static final double JOHNSON_AB_r
JOHNSON_AB_r
.public static final double JOHNSON_AB_i
JOHNSON_AB_i
.public static final double JOHNSON_AB_Rc
JOHNSON_AB_Rc
.public static final double JOHNSON_AB_Ic
JOHNSON_AB_Ic
.public static final double JOHNSON_AB_uPrime
JOHNSON_AB_uPrime
=u'AB.public static final double JOHNSON_AB_gPrime
JOHNSON_AB_gPrime
=g'AB.public static final double JOHNSON_AB_rPrime
JOHNSON_AB_rPrime
=r'AB.public static final double JOHNSON_AB_iPrime
JOHNSON_AB_iPrime
=i'AB.public static final double JOHNSON_AB_zPrime
JOHNSON_AB_zPrime
=z'AB.public static final double VEGA_AB_J
VEGA_AB_J
.public static final double VEGA_AB_H
VEGA_AB_H
.public static final double VEGA_AB_K
VEGA_AB_K
.public static double abToJansky(double magAB)
F/Jy=10(23-(AB+48.6)/2.5)
magAB
- AB magnitude valuepublic static double janskyToAb(double fluxJansky)
AB=2.5*(23-log10(F/Jy))-48.6
fluxJansky
- flux in Janskypublic static double luminosityToFlux(double lumin, double dist)
F=lumin/(4 x Pi x dist2)
lumin
- luminositydist
- luminosity distancepublic static double fluxToLuminosity(double flux, double dist)
lumin=(4 x Pi x dist2) F
flux
- fluxdist
- luminosity distanceCopyright © 2018 Central Laboratory of the Research Councils. All Rights Reserved.