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6dF Visualizations Supergalactic Cartesian Coordinates SGX Moving Slice 1000 km/s thick SGX from 3000 to -6000 in steps of 500 km/s (This version with.

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Presentation on theme: "6dF Visualizations Supergalactic Cartesian Coordinates SGX Moving Slice 1000 km/s thick SGX from 3000 to -6000 in steps of 500 km/s (This version with."— Presentation transcript:

1 6dF Visualizations Supergalactic Cartesian Coordinates SGX Moving Slice 1000 km/s thick SGX from 3000 to in steps of 500 km/s (This version with labelled features) LOCAL NEIGHBOURHOOD Tony Fairall / University of Cape Town / Nov 06

2 ‘Labyrinth’ software (written by C. Hultquist and S. Perumal) Where two or more galaxies are separated by less than the percolation distance (i.e. in groups,clusters or large- scale structures), they are enclosed within a transparent surface. The percolation distance used here is 100 km/s in redshift space at cz=0, but increased with increasing cz to compensate for the drastic decrease in data density. The colours carry no meaning, except the blue serves to subdue the visual appearance of the distant structures (that look thicker since they were created with a larger percolation distance), in balance with the nearer structures.

3 PowerPoint presentation allows one to scroll forwards and backwards

4 SGY -SGY -SGZ+SGZ Looking in a negative SGX direction.This grid applies to all slides following. REFERENCE GRID O 100 M pc

5 SGX = 3000 Each slice is 1000 km/s thick. ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S O

6 SGX = 2500 ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S O 100 M pc

7 SGX = 2000 ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S O V1 V2 100 M pc Newly identified voids (numbered from V1 to V526) labelled in this colour

8 SGX = 1500 ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S O COLUMBA VOID V1 V2 100 M pc Previously catalogued voids (e.g. Fairall 1998) labelled in this colour

9 SGX = 1000 ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S O AQUARIUS VOID CANIS MAJOR VOID COLUMBA VOID V1 V2 100 M pc

10 SGX = 500 F O R N A X W A L L ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S O ORION VOID AQUARIUS VOID CANIS MAJOR VOID COLUMBA VOID V1 100 M pc

11 SGX = 0 F O R N A X W A L L ERIDANUS VOID ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S OUR GALAXY LOCAL VOID AQUARIUS VOID CANIS MAJOR VOID COLUMBA VOID V1 V3 V4 100 M pc

12 SGX = -500 FORNAX CLUSTER ERIDANUS VOID ERIDANUS VOID F O R N A X W A L L ZOA 6dF LOCAL STRUCTURES N O D A T A F O R N O R T H E R N D E C L I N A T I O N S CETUS VOID VOLANSLOCAL VOID CRATER O AQUARIUS VOID MICROSCOPIUM VOID CANIS MAJOR VOID COLUMBA VOID A3354 V1 V3 V4 V5 V6 100 M pc

13 SGX = F O R N A X W A L L ERIDANUS VOID ZOA 6dF LOCAL STRUCTURES CETUS VOID LOCAL VOID O AQUARIUS VOID MICROSCOPIUM VOID CANIS MAJOR VOID SCULPTOR VOID V1 V3 V5 V6 100 M pc

14 SGX = ERIDANUS VOID ZOA 6dF LOCAL STRUCTURES CETUS VOID LOCAL VOID O AQUARIUS VOID MICROSCOPIUM VOID SCULPTOR VOID V1 V3 V5 V6 V7 V8 V9 V10 V11 V13 V M pc

15 SGX = ERIDANUS VOID ZOA 6dF LOCAL STRUCTURES LOCAL VOID O DRACO VOID AQUARIUS VOID MICROSCOPIUM VOID SCULPTOR VOID HYDRA CLUSTER V8 V9 V10 V11 V12 V13 V14V16V17 V M pc

16 SGX = ERIDANUS VOID ZOA 6dF LOCAL STRUCTURES LOCAL VOID O DRACO VOID AQUARIUS VOID MICROSCOPIUM VOID A3698 V10 V11 V13 V14 V15 V16V17 V M pc

17 SGX = ZOA 6dF LOCAL STRUCTURES O MICROSCOPIUM VOID HYDRA VOID A3565 CENTAURUS CLUSTER A3742 A3229 V14 V15 V16V17 V19 V20 V21 V M pc

18 SGX = ZOA 6dF LOCAL STRUCTURES O MICROSCOPIUM VOID HYDRA VOID A3559 A3574 A3656 V14 V15 V16V17 V19 V20 V21 V M pc

19 SGX = ZOA 6dF LOCAL STRUCTURES O MICROSCOPIUM VOID HYDRA VOID FURTHER CENTAURUS A3537 V14V17 V19 V21 V M pc

20 SGX = ZOA 6dF LOCAL STRUCTURES O A3627 V M pc HYDRA VOID

21 SGX = ZOA 6dF LOCAL STRUCTURES O HYDRA VOID A3389 V M pc

22 SGX = ZOA 6dF LOCAL STRUCTURES O APUS VOID A3581 V M pc

23 SGX = ZOA 6dF LOCAL STRUCTURES O APUS VOID 100 M pc

24 End of sequence


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