2023RNAAS...7..127S

Query : 2023RNAAS...7..127S

2023RNAAS...7..127S - Research Notes of the AAS, 7, 127 (2023/June-0)

Extratidal Members of Segue 3 are Rare and Difficult to Confirm.

SILVA E., COVEY K., WEBSTER K., LARSON K., HUGHES J., KUNDER A. and PRICE-WHELAN A.

Abstract (from CDS):

We simulate extratidal members of Segue 3, a sparse, faint, and small, ∼2.6 Gyr halo cluster, and investigate their observational detectability. Using the Gala package to simulate Segue 3's potential tidal tails, we find that the tails are narrow, linear, and around 4°-6° in length: the tails' position angles and width are most sensitive to the uncertainties in the cluster's distance and mean proper motion. Post-processing the synthetic tail particles to assign realistic observational properties, we infer that Segue 3 would have close to 25 extra-tidal members with G ≤ 23, concentrated ≲1.°33 from the center of the cluster. The 11 candidate extratidal members identified by Fadely and collaborators are comparable in number, but significantly closer to the cluster center (d ∼ 4') than these simulations predict. This analysis demonstrates the difficulty of identifying extratidal stars in the Milky Way's halo clusters, even in deep photometric surveys.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Star clusters - Globular star clusters - Open star clusters

Simbad objects: 1

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Number of rows : 1
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 Segue 3 Cl* 21 21 31.0 +19 07 02           ~ 75 0

Query : 2023RNAAS...7..127S

Basic data :
NAME Segue 3 -- Cluster of Stars
Other object types: otypes_help 		Cl* (2010ApJ), G (2014AJ)
ICRS coord. (ep=J2000) : 		21 21 31.0 +19 07 02 [ ] D 2010ApJ...718.1128L
FK4 coord. (ep=B1950 eq=1950) : 		21 19 12.0 +18 54 13 [ ]
Gal coord. (ep=J2000) : 		069.3992 -21.2725 [ ]
Proper motions mas/yr : 		-0.981 -1.667 [0.121 0.081 90] C 2021MNRAS.505.5978V
Parallaxes (mas): 		-0.005 [0.117] C 2021MNRAS.505.5978V
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NAME Segue 3 NAME Segue III

References (75 between 1850 and 2026) (Total 75)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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