Andromeda central supermassive black hole
E479290
The Andromeda central supermassive black hole is the enormous black hole residing at the core of the Andromeda Galaxy (M31), exerting a dominant gravitational influence on the surrounding stars and gas in its galactic nucleus.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Andromeda central supermassive black hole canonical | 1 |
| Andromeda galactic nucleus | 1 |
| Andromeda nuclear black hole | 1 |
| M31 central black hole | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4917300 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Andromeda central supermassive black hole Context triple: [M31*, alternativeName, Andromeda central supermassive black hole]
-
A.
Messier 87
Messier 87 is a giant elliptical galaxy in the Virgo Cluster, notable for its supermassive black hole and powerful relativistic jet.
-
B.
Andromeda X
Andromeda X is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy within the Local Group.
-
C.
Milky Way center
The Milky Way center is the dense, energetic core of our galaxy, hosting a supermassive black hole surrounded by stars, gas, and dust.
-
D.
Andromeda
Andromeda is a princess in Greek mythology who was rescued from a sea monster by the hero Perseus and later became his wife.
-
E.
Andromeda XXVIII
Andromeda XXVIII is a faint dwarf satellite galaxy located near the Andromeda Galaxy within the Local Group.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Andromeda central supermassive black hole Target entity description: The Andromeda central supermassive black hole is the enormous black hole residing at the core of the Andromeda Galaxy (M31), exerting a dominant gravitational influence on the surrounding stars and gas in its galactic nucleus.
-
A.
Messier 87
Messier 87 is a giant elliptical galaxy in the Virgo Cluster, notable for its supermassive black hole and powerful relativistic jet.
-
B.
Andromeda X
Andromeda X is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy within the Local Group.
-
C.
Milky Way center
The Milky Way center is the dense, energetic core of our galaxy, hosting a supermassive black hole surrounded by stars, gas, and dust.
-
D.
Andromeda
Andromeda is a princess in Greek mythology who was rescued from a sea monster by the hero Perseus and later became his wife.
-
E.
Andromeda XXVIII
Andromeda XXVIII is a faint dwarf satellite galaxy located near the Andromeda Galaxy within the Local Group.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
astrophysical object
ⓘ
supermassive black hole ⓘ |
| activityClassification | low-luminosity active galactic nucleus ⓘ |
| activityLevel | currently quiescent ⓘ |
| alternativeName |
Andromeda nuclear black hole
ⓘ
linked to:
Andromeda central supermassive black hole
M31 central black hole ⓘ
linked to:
Andromeda central supermassive black hole
M31* ⓘ |
| centralObjectOf |
Andromeda Galaxy
ⓘ
Andromeda galactic nucleus ⓘ
linked to:
Andromeda central supermassive black hole
|
| distanceFromEarth |
about 2.5 million light-years
ⓘ
about 780 kiloparsecs ⓘ |
| electromagneticEmission |
radio emission
ⓘ
weak X-ray emission ⓘ |
| eventHorizonType | Schwarzschild or slowly spinning Kerr black hole (uncertain spin) ⓘ |
| evidenceType |
X-ray observations
ⓘ
gas kinematics ⓘ radio observations ⓘ stellar kinematics ⓘ |
| formationScenario |
growth by accretion of gas
ⓘ
growth by mergers with smaller black holes ⓘ growth by tidal disruption of stars ⓘ |
| futureEvent | expected to form a binary with Sagittarius A* in several billion years ⓘ |
| futureInteraction | may interact with Milky Way central black hole after Milky Way–Andromeda merger ⓘ |
| gravitationalInfluence |
nuclear star cluster of Andromeda Galaxy
ⓘ
linked to:
nuclear star cluster of Andromeda
surrounding gas in galactic nucleus ⓘ surrounding stars in galactic bulge ⓘ |
| hasAccretion | low-luminosity accretion flow ⓘ |
| hostGalaxy | Andromeda Galaxy ⓘ |
| locatedIn |
Andromeda Galaxy
ⓘ
Local Group ⓘ Virgo Supercluster ⓘ constellation Andromeda ⓘ galactic nucleus of Andromeda Galaxy ⓘ observable universe ⓘ |
| mass |
about 1.4e8 solar masses
ⓘ
of order 10^8 solar masses ⓘ |
| massEstimateMethod |
gas dynamical modeling
ⓘ
stellar dynamical modeling ⓘ |
| massRatioToSagittariusA* | roughly 30 ⓘ |
| moreMassiveThan | Sagittarius A* ⓘ |
| observedBy |
Chandra X-ray Observatory
ⓘ
Hubble Space Telescope ⓘ Keck Observatory ⓘ
linked to:
W. M. Keck Observatory
Very Large Telescope ⓘ |
| redshift | approximately -0.001 (blueshift of host galaxy) ⓘ |
| roleInGalaxy |
dominant gravitational source in central parsec
ⓘ
influences dynamics of nuclear star cluster ⓘ |
| similarTo |
Milky Way central supermassive black hole Sagittarius A*
ⓘ
linked to:
Sagittarius A*
|
| surroundedBy |
double-peaked nuclear star cluster
ⓘ
eccentric nuclear stellar disk ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Andromeda central supermassive black hole Description of subject: The Andromeda central supermassive black hole is the enormous black hole residing at the core of the Andromeda Galaxy (M31), exerting a dominant gravitational influence on the surrounding stars and gas in its galactic nucleus.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Andromeda central supermassive black hole
linked to: Andromeda central supermassive black hole
linked to: Andromeda central supermassive black hole