---
title: Template:Infobox/neutron_star
canonical_url: https://paxabyssi.com/wiki/Template:Infobox/neutron_star
markdown_url: https://paxabyssi.com/wiki/Template:Infobox/neutron_star.md
type: wiki-page
namespace: Template
revision_id: 9
revision_view: stable
last_updated: 2026-09-27
license: CC BY-SA 4.0
license_url: https://creativecommons.org/licenses/by-sa/4.0/
summary: "Infobox schema for neutron star pages (the class page and individual pulsars and magnetars): the fields, their groups, labels and units, as a JSON Schema."
categories:
  - Infobox schemas
---

# Template:Infobox/neutron_star

> Source: https://paxabyssi.com/wiki/Template:Infobox/neutron_star
>
> Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/). Text by Pax Abyssi Wiki contributors; history at https://paxabyssi.com/wiki/Template:Infobox/neutron_star/history
>
> Revision 9, 27 September 2026

This page holds the JSON Schema for `infobox: type: neutron_star`, used by neutron star pages (the class page and individual pulsars and magnetars) (the field list follows SCIENCE_CORPUS 3.4 G). Every page whose frontmatter names this type is validated against it on save: a schema error blocks a save by a new account or an API client and warns a trusted editor.

Values are flexible so that writers can record what the sources allow. A field may be plain text or a number, a quantity object `{value, unit, min, max, error, source, note}`, or a by-status mapping `{observed, model, sim}` when the measured, inferred and generated values differ. Fields not listed here are allowed and shown under "Other" in the infobox. The `x-pax` block carries display metadata: the groups in order, each group's default provenance tag, and the label and unit for every field.

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://paxabyssi.com/wiki/Template:Infobox/neutron_star",
  "title": "Neutron star",
  "description": "Infobox for neutron star pages (the class page and individual pulsars and magnetars). Fields follow SCIENCE_CORPUS 3.4 G.",
  "type": "object",
  "required": [
    "type"
  ],
  "properties": {
    "type": {
      "const": "neutron_star"
    },
    "image": {
      "$ref": "#/$defs/fileTitle",
      "description": "Lead image, a File: title."
    },
    "caption": {
      "type": "string"
    },
    "image_caption": {
      "type": "string"
    },
    "classes": {
      "$ref": "#/$defs/field"
    },
    "class": {
      "type": "string"
    },
    "catalogue_ids": {
      "$ref": "#/$defs/field"
    },
    "source_catalogue": {
      "$ref": "#/$defs/field"
    },
    "known_count": {
      "$ref": "#/$defs/field"
    },
    "nearest_known": {
      "$ref": "#/$defs/field"
    },
    "distance_methods": {
      "$ref": "#/$defs/field"
    },
    "distance_pc": {
      "$ref": "#/$defs/field"
    },
    "spin_period_s": {
      "$ref": "#/$defs/field"
    },
    "period_derivative_s_per_s": {
      "$ref": "#/$defs/field"
    },
    "characteristic_age_yr": {
      "$ref": "#/$defs/field"
    },
    "dipole_field_g": {
      "$ref": "#/$defs/field"
    },
    "spin_down_luminosity_erg_s": {
      "$ref": "#/$defs/field"
    },
    "dispersion_measure_pc_cm3": {
      "$ref": "#/$defs/field"
    },
    "mass_msun": {
      "$ref": "#/$defs/field"
    },
    "maximum_mass_msun": {
      "$ref": "#/$defs/field"
    },
    "radius_km": {
      "$ref": "#/$defs/field"
    },
    "mean_density_kg_m3": {
      "$ref": "#/$defs/field"
    },
    "surface_gravity_m_s2": {
      "$ref": "#/$defs/field"
    },
    "escape_speed": {
      "$ref": "#/$defs/field"
    },
    "surface_temperature_k": {
      "$ref": "#/$defs/field"
    },
    "sim_stops": {
      "$ref": "#/$defs/field"
    },
    "sim_source": {
      "$ref": "#/$defs/field"
    },
    "physics_engine": {
      "$ref": "#/$defs/field"
    },
    "science_doc": {
      "$ref": "#/$defs/field"
    },
    "rendered_example": {
      "$ref": "#/$defs/field"
    },
    "last_verified": {
      "$ref": "#/$defs/field"
    }
  },
  "additionalProperties": true,
  "$defs": {
    "quantity": {
      "type": "object",
      "description": "A number or range with its unit and provenance.",
      "properties": {
        "value": {
          "type": [
            "number",
            "string",
            "null"
          ]
        },
        "unit": {
          "type": "string"
        },
        "min": {
          "type": [
            "number",
            "string"
          ]
        },
        "max": {
          "type": [
            "number",
            "string"
          ]
        },
        "error": {
          "type": [
            "number",
            "string"
          ]
        },
        "uncertainty": {
          "type": [
            "number",
            "string"
          ]
        },
        "source": {
          "type": "string",
          "description": "observed | model | sim | catalogue | fiction, or a citation."
        },
        "note": {
          "type": "string"
        },
        "as_of": {
          "type": [
            "string",
            "number"
          ]
        }
      },
      "additionalProperties": true
    },
    "byStatus": {
      "type": "object",
      "description": "The same quantity as measured (observed), inferred (model) and generated (sim).",
      "properties": {
        "observed": {
          "$ref": "#/$defs/cell"
        },
        "model": {
          "$ref": "#/$defs/cell"
        },
        "sim": {
          "$ref": "#/$defs/cell"
        },
        "note": {
          "type": "string"
        }
      },
      "additionalProperties": true
    },
    "cell": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "number"
        },
        {
          "type": "boolean"
        },
        {
          "type": "null"
        },
        {
          "type": "array"
        },
        {
          "$ref": "#/$defs/quantity"
        }
      ]
    },
    "field": {
      "anyOf": [
        {
          "$ref": "#/$defs/cell"
        },
        {
          "$ref": "#/$defs/byStatus"
        },
        {
          "type": "object"
        }
      ]
    },
    "fileTitle": {
      "type": "string",
      "pattern": "^File:"
    },
    "status": {
      "description": "One or more of observed, model, sim, speculative, fiction; or a sentence saying which parts carry which label.",
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      ]
    }
  },
  "x-pax": {
    "label": "Neutron star",
    "image_field": "image",
    "caption_field": "caption",
    "groups": [
      {
        "index": "01",
        "title": "Identity",
        "fields": [
          "classes",
          "class",
          "catalogue_ids",
          "source_catalogue",
          "known_count",
          "nearest_known",
          "distance_methods",
          "distance_pc"
        ],
        "provenance": "catalogue"
      },
      {
        "index": "02",
        "title": "Spin and field",
        "fields": [
          "spin_period_s",
          "period_derivative_s_per_s",
          "characteristic_age_yr",
          "dipole_field_g",
          "spin_down_luminosity_erg_s",
          "dispersion_measure_pc_cm3"
        ]
      },
      {
        "index": "03",
        "title": "Structure",
        "fields": [
          "mass_msun",
          "maximum_mass_msun",
          "radius_km",
          "mean_density_kg_m3",
          "surface_gravity_m_s2",
          "escape_speed",
          "surface_temperature_k"
        ]
      },
      {
        "index": "04",
        "title": "Sim",
        "fields": [
          "sim_stops",
          "sim_source",
          "physics_engine",
          "science_doc",
          "rendered_example",
          "last_verified"
        ],
        "provenance": "sim"
      }
    ],
    "fields": {
      "classes": {
        "label": "Classes"
      },
      "class": {
        "label": "Class"
      },
      "catalogue_ids": {
        "label": "Catalogue ids"
      },
      "source_catalogue": {
        "label": "Source catalogue"
      },
      "known_count": {
        "label": "Known count"
      },
      "nearest_known": {
        "label": "Nearest known"
      },
      "distance_methods": {
        "label": "Distance methods"
      },
      "distance_pc": {
        "label": "Distance",
        "unit": "pc"
      },
      "spin_period_s": {
        "label": "Spin period",
        "unit": "s"
      },
      "period_derivative_s_per_s": {
        "label": "Period derivative",
        "unit": "s/s"
      },
      "characteristic_age_yr": {
        "label": "Characteristic age",
        "unit": "yr"
      },
      "dipole_field_g": {
        "label": "Dipole field",
        "unit": "G"
      },
      "spin_down_luminosity_erg_s": {
        "label": "Spin-down luminosity",
        "unit": "erg/s"
      },
      "dispersion_measure_pc_cm3": {
        "label": "Dispersion measure",
        "unit": "pc/cm³"
      },
      "mass_msun": {
        "label": "Mass",
        "unit": "M☉"
      },
      "maximum_mass_msun": {
        "label": "Maximum mass",
        "unit": "M☉"
      },
      "radius_km": {
        "label": "Radius",
        "unit": "km"
      },
      "mean_density_kg_m3": {
        "label": "Mean density",
        "unit": "kg/m³"
      },
      "surface_gravity_m_s2": {
        "label": "Surface gravity",
        "unit": "m/s²"
      },
      "escape_speed": {
        "label": "Escape speed"
      },
      "surface_temperature_k": {
        "label": "Surface temperature",
        "unit": "K"
      },
      "sim_stops": {
        "label": "Sim stops"
      },
      "sim_source": {
        "label": "Sim source"
      },
      "physics_engine": {
        "label": "Physics engine"
      },
      "science_doc": {
        "label": "Science document"
      },
      "rendered_example": {
        "label": "Rendered example"
      },
      "last_verified": {
        "label": "Last verified"
      }
    }
  }
}
```

Categories: [Infobox schemas](https://paxabyssi.com/wiki/Category:Infobox_schemas.md)