Class BlackHole

java.lang.Object

org.episteme.natural.physics.astronomy.astrophysics.BlackHole

public class BlackHole
extends Object

Black hole physics calculations.

Since:

1.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

Field Summary

Fields

Modifier and Type	Field	Description
static final Real	C	Speed of light (m/s)
static final Real	G	Gravitational constant (m³/(kg·s²))
static final Real	M_SUN	Solar mass (kg)

Constructor Summary

Constructors

Constructor	Description
BlackHole()

Method Summary

Modifier and Type	Method	Description
static Real	entropy(Real mass)	Bekenstein-Hawking entropy.
static Real	evaporationTime(Real mass)	Black hole evaporation time.
static Real	gravitationalRedshift(Real r, Real rs)	Gravitational redshift.
static Real	hawkingLuminosity(Real mass)	Black hole luminosity from Hawking radiation.
static Real	hawkingTemperature(Real mass)	Hawking temperature.
static Real	iscoRadius(Real mass)	Innermost stable circular orbit (ISCO) for Schwarzschild.
static Real	kerrErgosphereEquator(Real mass)	Kerr black hole ergosphere radius at equator.
static Real	kerrOuterHorizon(Real mass, Real J)	Kerr black hole outer horizon radius.
static Real	photonSphereRadius(Real mass)	Photon sphere radius (light can orbit).
static Real	schwarzschildRadius(Real mass)	Schwarzschild radius (event horizon for non-rotating black hole). r_s = 2GM/c²
static Real	schwarzschildRadiusSolarMass(Real solarMasses)	Schwarzschild radius in solar masses. r_s ≈2.95 km per solar mass
static Real	timeDilation(Real r, Real rs)	Gravitational time dilation near Schwarzschild black hole.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

G

public static final Real G

Gravitational constant (m³/(kg·s²))

C

public static final Real C

Speed of light (m/s)

M_SUN

public static final Real M_SUN

Solar mass (kg)

Constructor Details

BlackHole

public BlackHole()

Method Details

schwarzschildRadius

public static Real schwarzschildRadius(Real mass)

Schwarzschild radius (event horizon for non-rotating black hole). r_s = 2GM/c²

schwarzschildRadiusSolarMass

public static Real schwarzschildRadiusSolarMass(Real solarMasses)

Schwarzschild radius in solar masses. r_s ≈2.95 km per solar mass

timeDilation

public static Real timeDilation(Real r,
 Real rs)

Gravitational time dilation near Schwarzschild black hole.

gravitationalRedshift

public static Real gravitationalRedshift(Real r,
 Real rs)

Gravitational redshift.

iscoRadius

public static Real iscoRadius(Real mass)

Innermost stable circular orbit (ISCO) for Schwarzschild.

photonSphereRadius

public static Real photonSphereRadius(Real mass)

Photon sphere radius (light can orbit).

hawkingTemperature

public static Real hawkingTemperature(Real mass)

Hawking temperature. T = ℏc³ / (8πGMk_B)

entropy

public static Real entropy(Real mass)

Bekenstein-Hawking entropy.

kerrOuterHorizon

public static Real kerrOuterHorizon(Real mass,
 Real J)

Kerr black hole outer horizon radius.

kerrErgosphereEquator

public static Real kerrErgosphereEquator(Real mass)

Kerr black hole ergosphere radius at equator.

hawkingLuminosity

public static Real hawkingLuminosity(Real mass)

Black hole luminosity from Hawking radiation.

evaporationTime

public static Real evaporationTime(Real mass)

Black hole evaporation time.