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| Query : 2018MNRAS.474.4766C |
2018MNRAS.474.4766C - Mon. Not. R. Astron. Soc., 474, 4766-4771 (2018/March-2)
The globular cluster NGC 7492 and the Sagittarius tidal stream: together but unmixed.
CARBALLO-BELLO J.A., CORRAL-SANTANA J.M., CATELAN M., MARTINEZ-DELGADO D., MUNOZ R.R., SOLLIMA A., NAVARRETE C., DUFFAU S., COTE P. and MORA M.D.
Journal keyword(s): Galaxy: formation - globular clusters: individual - Galaxy: halo A abs We have derived from VIMOS spectroscopy the radial velocities for a sample of 71 stars selected from CFHT/Megacam photometry around the Galactic globular cluster NGC 7492. In the resulting velocity distribution, it is possible to distinguish two relevant non-Galactic kinematic components along the same line of sight: a group of stars at <vr> ∼ 125 km s–1 which is compatible with the velocity of the old leading arm of the Sagittarius tidal stream, and a larger number of objects at <vr> ∼ -110 km s–1 that might be identified as members of the trailing wrap of the same stream. The systemic velocity of NGC 7492 set at vr ∼ -177 km s–1 differs significantly from that of both components, thus our results confirm that this cluster is not one of the globular clusters deposited by the Sagittarius dwarf spheroidal in the Galactic halo, even if it is immersed in the stream. A group of stars with <vr> ∼ - 180 km s–1 might be comprised of cluster members along one of the tidal tails of NGC 7492.
Nomenclature: Table 1: [CCC2018] NGC 7492 NN (Nos 1-71).
Simbad objects: 78
| Number of rows : 78 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NAME Sagittarius Stream | St* | 02 22 | +00.0 | ~ | 1001 | 0 | |||||
| 2 | M 54 | GlC | 18 55 03.33 | -30 28 47.5 | ~ | 1164 | 0 | |||||
| 3 | NAME SDG | G | 18 55 19.0 | -30 32 43 | 4.5 | 3.6 | ~ | 2438 | 2 | |||
| 4 | Cl Terzan 7 | GlC | 19 17 43.92 | -34 39 27.8 | ~ | 460 | 0 | |||||
| 5 | Cl Arp 2 | GlC | 19 28 44.11 | -30 21 20.3 | 12.41 | ~ | 384 | 0 | ||||
| 6 | Cl Terzan 8 | GlC | 19 41 44.41 | -33 59 58.1 | 11.54 | ~ | 357 | 0 | ||||
| 7 | [CCC2018] NGC 7492 30 | * | 23 06 52.50 | -15 13 01.8 | ~ | 1 | 0 | |||||
| 8 | [CCC2018] NGC 7492 17 | * | 23 06 52.90 | -15 15 30.5 | ~ | 1 | 0 | |||||
| 9 | [CCC2018] NGC 7492 22 | * | 23 06 53.50 | -15 22 32.8 | ~ | 1 | 0 | |||||
| 10 | [CCC2018] NGC 7492 15 | * | 23 06 56.80 | -15 12 04.8 | ~ | 1 | 0 | |||||
| 11 | [CCC2018] NGC 7492 9 | * | 23 06 58.50 | -15 16 37.1 | ~ | 1 | 0 | |||||
| 12 | [CCC2018] NGC 7492 23 | * | 23 06 58.90 | -15 22 52.2 | ~ | 1 | 0 | |||||
| 13 | [CCC2018] NGC 7492 6 | * | 23 07 01.00 | -15 17 21.2 | ~ | 1 | 0 | |||||
| 14 | [CCC2018] NGC 7492 10 | * | 23 07 02.50 | -15 21 13.0 | ~ | 1 | 0 | |||||
| 15 | [CCC2018] NGC 7492 11 | * | 23 07 05.40 | -15 23 02.7 | ~ | 1 | 0 | |||||
| 16 | [CCC2018] NGC 7492 16 | * | 23 07 06.00 | -15 16 18.7 | ~ | 1 | 0 | |||||
| 17 | [CCC2018] NGC 7492 21 | * | 23 07 09.30 | -15 21 51.3 | ~ | 1 | 0 | |||||
| 18 | [CCC2018] NGC 7492 31 | * | 23 07 10.20 | -15 14 14.7 | ~ | 1 | 0 | |||||
| 19 | [CCC2018] NGC 7492 18 | * | 23 07 11.40 | -15 12 27.8 | ~ | 1 | 0 | |||||
| 20 | [CCC2018] NGC 7492 14 | * | 23 07 13.30 | -15 14 23.6 | ~ | 1 | 0 | |||||
| 21 | [CCC2018] NGC 7492 24 | * | 23 07 14.30 | -15 24 37.2 | ~ | 1 | 0 | |||||
| 22 | [CCC2018] NGC 7492 7 | * | 23 07 33.00 | -15 25 00.8 | ~ | 1 | 0 | |||||
| 23 | [CCC2018] NGC 7492 4 | * | 23 07 34.60 | -15 15 41.2 | ~ | 1 | 0 | |||||
| 24 | [CCC2018] NGC 7492 20 | * | 23 07 37.60 | -15 20 44.2 | ~ | 1 | 0 | |||||
| 25 | [CCC2018] NGC 7492 2 | * | 23 07 38.00 | -15 26 18.0 | ~ | 1 | 0 | |||||
| 26 | [CCC2018] NGC 7492 8 | * | 23 07 40.20 | -15 25 09.0 | ~ | 1 | 0 | |||||
| 27 | [CCC2018] NGC 7492 1 | * | 23 07 43.60 | -15 16 53.7 | ~ | 1 | 0 | |||||
| 28 | [CCC2018] NGC 7492 13 | * | 23 07 44.20 | -15 12 36.3 | ~ | 1 | 0 | |||||
| 29 | [CCC2018] NGC 7492 29 | * | 23 07 45.70 | -15 15 32.8 | ~ | 1 | 0 | |||||
| 30 | [CCC2018] NGC 7492 19 | * | 23 07 48.80 | -15 25 50.2 | ~ | 1 | 0 | |||||
| 31 | [CCC2018] NGC 7492 26 | * | 23 07 50.40 | -15 11 48.0 | ~ | 1 | 0 | |||||
| 32 | [CCC2018] NGC 7492 27 | * | 23 07 51.30 | -15 13 30.0 | ~ | 1 | 0 | |||||
| 33 | [CCC2018] NGC 7492 3 | * | 23 07 54.40 | -15 24 37.3 | ~ | 1 | 0 | |||||
| 34 | [CCC2018] NGC 7492 28 | * | 23 07 55.10 | -15 14 20.1 | ~ | 1 | 0 | |||||
| 35 | [CCC2018] NGC 7492 12 | * | 23 07 55.80 | -15 12 53.1 | ~ | 1 | 0 | |||||
| 36 | [CCC2018] NGC 7492 5 | * | 23 08 01.30 | -15 21 39.9 | ~ | 1 | 0 | |||||
| 37 | [CCC2018] NGC 7492 25 | * | 23 08 01.90 | -15 14 32.6 | ~ | 1 | 0 | |||||
| 38 | NGC 7492 | GlC | 23 08 26.68 | -15 36 41.3 | 10.48 | ~ | 330 | 0 | ||||
| 39 | [CCC2018] NGC 7492 70 | * | 23 09 03.80 | -15 28 42.3 | ~ | 1 | 0 | |||||
| 40 | [CCC2018] NGC 7492 71 | * | 23 09 04.30 | -15 29 02.8 | ~ | 1 | 0 | |||||
| 41 | [CCC2018] NGC 7492 68 | * | 23 09 05.80 | -15 28 00.3 | ~ | 1 | 0 | |||||
| 42 | [CCC2018] NGC 7492 43 | * | 23 09 08.70 | -15 32 52.3 | ~ | 1 | 0 | |||||
| 43 | [CCC2018] NGC 7492 66 | * | 23 09 09.60 | -15 26 59.0 | ~ | 1 | 0 | |||||
| 44 | [CCC2018] NGC 7492 59 | * | 23 09 10.10 | -15 23 44.5 | ~ | 1 | 0 | |||||
| 45 | [CCC2018] NGC 7492 60 | * | 23 09 10.30 | -15 24 44.5 | ~ | 1 | 0 | |||||
| 46 | [CCC2018] NGC 7492 63 | * | 23 09 10.60 | -15 25 28.5 | ~ | 1 | 0 | |||||
| 47 | [CCC2018] NGC 7492 64 | * | 23 09 13.70 | -15 25 58.6 | ~ | 1 | 0 | |||||
| 48 | [CCC2018] NGC 7492 67 | * | 23 09 15.50 | -15 27 51.9 | ~ | 1 | 0 | |||||
| 49 | [CCC2018] NGC 7492 62 | * | 23 09 16.70 | -15 25 17.3 | ~ | 1 | 0 | |||||
| 50 | [CCC2018] NGC 7492 61 | * | 23 09 19.00 | -15 24 54.7 | ~ | 1 | 0 | |||||
| 51 | [CCC2018] NGC 7492 46 | * | 23 09 19.90 | -15 36 26.1 | ~ | 1 | 0 | |||||
| 52 | [CCC2018] NGC 7492 44 | * | 23 09 23.10 | -15 34 09.0 | ~ | 1 | 0 | |||||
| 53 | [CCC2018] NGC 7492 45 | * | 23 09 27.80 | -15 35 39.5 | ~ | 1 | 0 | |||||
| 54 | [CCC2018] NGC 7492 65 | * | 23 09 27.80 | -15 26 19.0 | ~ | 1 | 0 | |||||
| 55 | [CCC2018] NGC 7492 69 | * | 23 09 33.10 | -15 28 26.6 | ~ | 1 | 0 | |||||
| 56 | [CCC2018] NGC 7492 58 | * | 23 09 44.70 | -15 28 23.8 | ~ | 1 | 0 | |||||
| 57 | [CCC2018] NGC 7492 39 | * | 23 09 45.70 | -15 35 25.3 | ~ | 1 | 0 | |||||
| 58 | [CCC2018] NGC 7492 42 | * | 23 09 46.60 | -15 36 33.3 | ~ | 1 | 0 | |||||
| 59 | [CCC2018] NGC 7492 47 | * | 23 09 47.90 | -15 23 43.8 | ~ | 1 | 0 | |||||
| 60 | TYC 6395-627-1 | * | 23 09 49.0867015248 | -15 27 16.035843708 | 12.01 | 11.84 | ~ | 1 | 0 | |||
| 61 | [CCC2018] NGC 7492 38 | * | 23 09 50.50 | -15 34 58.4 | ~ | 1 | 0 | |||||
| 62 | [CCC2018] NGC 7492 35 | * | 23 09 56.00 | -15 33 51.9 | ~ | 1 | 0 | |||||
| 63 | [CCC2018] NGC 7492 50 | * | 23 09 57.80 | -15 24 43.9 | ~ | 1 | 0 | |||||
| 64 | [CCC2018] NGC 7492 34 | * | 23 09 58.40 | -15 33 17.4 | ~ | 1 | 0 | |||||
| 65 | [CCC2018] NGC 7492 56 | * | 23 10 01.50 | -15 27 39.8 | ~ | 1 | 0 | |||||
| 66 | [CCC2018] NGC 7492 55 | * | 23 10 02.00 | -15 27 27.7 | ~ | 1 | 0 | |||||
| 67 | [CCC2018] NGC 7492 33 | * | 23 10 02.80 | -15 37 15.7 | ~ | 1 | 0 | |||||
| 68 | [CCC2018] NGC 7492 40 | * | 23 10 03.20 | -15 35 56.7 | ~ | 1 | 0 | |||||
| 69 | [CCC2018] NGC 7492 36 | * | 23 10 04.10 | -15 34 09.4 | ~ | 1 | 0 | |||||
| 70 | [CCC2018] NGC 7492 32 | * | 23 10 05.10 | -15 36 51.7 | ~ | 1 | 0 | |||||
| 71 | [CCC2018] NGC 7492 41 | * | 23 10 07.60 | -15 36 14.4 | ~ | 1 | 0 | |||||
| 72 | [CCC2018] NGC 7492 52 | * | 23 10 07.70 | -15 25 30.3 | ~ | 1 | 0 | |||||
| 73 | [CCC2018] NGC 7492 48 | * | 23 10 10.40 | -15 23 54.0 | ~ | 1 | 0 | |||||
| 74 | [CCC2018] NGC 7492 37 | * | 23 10 12.30 | -15 34 23.3 | ~ | 1 | 0 | |||||
| 75 | [CCC2018] NGC 7492 49 | * | 23 10 12.90 | -15 24 13.9 | ~ | 1 | 0 | |||||
| 76 | [CCC2018] NGC 7492 57 | * | 23 10 13.50 | -15 27 54.9 | ~ | 1 | 0 | |||||
| 77 | [CCC2018] NGC 7492 53 | * | 23 10 13.60 | -15 27 02.0 | ~ | 1 | 0 | |||||
| 78 | [CCC2018] NGC 7492 51 | * | 23 10 14.30 | -15 25 02.4 | ~ | 1 | 0 |
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