SIMBAD: Object types

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Since now, the historical list of object types is replaced by this reorganized list, based on physical properties, and on the evolutionary stage for stars. It enable a more interactive search, and provide minimal definitions. The hierarchies between object types evolve: for instance, a RR Lyrae Star still be in the hierarchy of Variable Stars, and also in the hierarchy of Horizontal Branch Stars. If you are using the hierarchies in scripts, you might have to adapt your scripts to the new description.

Here is a list of evolved labels. Please send us an email if you have more questions

The Object Type in Simbad is defined as a hierarchical classification, which emphasizes the physical nature of the object rather than a peculiar emission in some region of the electromagnetic spectrum or the location in peculiar clusters or external galaxies. Therefore objects are classified as peculiar emitters (Radio, IR, Red, Blue, UV, X or gamma) only if nothing more about the nature of the object is known, i.e. it cannot be decided whether the object is a star, a multiple system, a nebula or a galaxy.

Each class has normally a standard designation, a condensed one (used in tables) and an extended explanation. The "hierarchy" column gives the list of types used behind selection criteria queries/TAP/Aladin.

Aliases explanation
This object type is found in the literature but does not exist, or not anymore, in Simbad. However the column comments gives keys to the users to select them in the database.
*, Ma*, bC*, sg*, s*r, s*y, s*b, WR*, N*, Psr, Y*O, Or*, TT*, Ae*, out, HH, MS*, Be*, BS*, SX*, gD*, dS*, Ev*, RG*, HS*, HB*, RR*, WV*, Ce*, cC*, C*, S*, AB*, Mi*, OH*, pA*, RV*, PN, WD*, Pe*, a2*, RC*, **, El*, EB*, SB*, BY*, RS*, Sy*, XB*, LXB, HXB, CV*, No*, SN*, LM*, BD*, V*, Ir*, Er*, Ro*, Pu*, LP*, Em*, PM*, HV*
V*, bC*, Or*, SX*, gD*, dS*, RR*, WV*, Ce*, cC*, LP*, Mi*, RV*, a2*, RC*, El*, EB*, BY*, RS*, CV*, No*, Ir*, Er*, Ro*, Pu*
Cl*, GlC, OpC, As*, St*, MGr
ISM, SFR, HII, Cld, GNe, RNe, MoC, DNe, glb, CGb, HVC, cor, bub, SNR, sh, flt
G, LSB, bCG, SBG, H2G, EmG, AGN, SyG, Sy1, Sy2, rG, LIN, QSO, Bla, BLL, GiP, GiG, GiC, BiC
IG, PaG, GrG, CGG, ClG, SCG, vid

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