2024MNRAS.527.6173Q

Query : 2024MNRAS.527.6173Q

2024MNRAS.527.6173Q - Mon. Not. R. Astron. Soc., 527, 6173-6188 (2024/January-3)

Characterization of high-velocity stars in the S-PLUS internal fourth data release.

QUISPE-HUAYNASI F., ROIG F., PLACCO V.M., BERALDO E SILVA L., DAFLON S., PEREIRA C.B., KANAAN A., MENDES DE OLIVEIRA C., RIBEIRO T. and SCHOENELL W.

Abstract (from CDS):

In general, the atypical high velocity of some stars in the Galaxy can only be explained by invoking acceleration mechanisms related to extreme astrophysical events in the Milky Way. Using astrometric data from Gaia and the photometric information in 12 filters of the S-PLUS, we performed a kinematic, dynamical, and chemical analysis of 64 stars with Galactocentric velocities higher than 400 $\mathrm{km\, s}^{-1}$. All the stars are gravitationally bound to the Galaxy and exhibit halo kinematics. Some of the stars could be remnants of structures such as the Sequoia and the Gaia-Sausage/Enceladus. Supported by orbital and chemical analysis, we identified Gaia DR3 5401875170994688896 as a star likely to be originated at the centre of the Galaxy. Application of a machine learning technique to the S-PLUS photometric data allows us to obtain very good estimates of magnesium abundances for this sample of high-velocity stars.

Abstract Copyright: © The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): stars: fundamental parameters - stars: kinematics and dynamics - Galaxy: stellar content

Simbad objects: 69

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Number of rows : 69
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 GD 574 HV* 00 03 06.6692155944 -29 52 38.341744068   14.21 13.74 13.73   ~ 8 0
2 Gaia DR3 5048231102894377344 HV* 03 14 54.3229256171 -33 51 10.515017700           ~ 1 0
3 Gaia DR3 4856695936817617280 HV* 03 44 33.8793126015 -37 31 53.018230863           ~ 1 0
4 Gaia DR3 4882090566610735360 HV* 04 12 46.4658049218 -34 13 27.906296628           ~ 1 0
5 2MASS J04162667-5851505 HV* 04 16 26.6821684512 -58 51 50.402975328           ~ 3 0
6 Gaia DR3 4788911315546547328 HV* 04 23 59.5992645773 -47 37 16.763321903           ~ 1 0
7 Gaia DR3 4788482544668341632 HV* 04 25 51.9047147333 -49 06 36.090747068           ~ 1 0
8 BPS CS 31080-0095 Pe* 04 44 22.0059867696 -45 13 54.232871592 13.219 13.466 12.937 13.087 12.372 CEMP-s 26 0
9 Gaia DR3 4787052870314603520 HV* 04 49 38.9098064155 -47 03 11.272369975           ~ 1 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
11 WT 2465 HV* 09 59 21.2378072760 -30 59 59.217230112   15.0       ~ 2 0
12 Gaia DR3 5674511482965847168 HV* 10 08 40.7168999576 -14 49 59.381280401           ~ 1 0
13 Gaia DR3 3772348601612372992 HV* 10 12 34.1770101023 -08 06 07.760260267           ~ 1 0
14 Gaia DR3 5473218563510860032 HV* 10 14 16.9157701613 -24 42 32.564638761           ~ 1 0
15 UCAC4 384-056786 Pe* 10 16 21.2807168703 -13 16 40.105952608   14.532 13.851 13.774   ~ 4 0
16 UCAC4 380-059225 HV* 10 22 36.9809807040 -14 03 45.630219672   13.594 12.826 12.714 12.029 ~ 8 0
17 Gaia DR3 5441944638890204160 HV* 10 26 44.1751077173 -37 52 16.404237595           ~ 1 0
18 Gaia DR3 5475847186574041984 HV* 10 29 59.1746194132 -21 31 58.587652807           ~ 1 0
19 Gaia DR3 5469865053045546112 HV* 10 42 03.4200659225 -25 46 30.835602609           ~ 1 0
20 Gaia DR3 3750233780645824768 HV* 10 46 46.7661943630 -14 21 59.363513566           ~ 1 0
21 Gaia DR2 5401875170994688896 Pe* 10 58 56.0784013406 -34 18 14.902369623           ~ 3 0
22 Gaia DR3 3545705651305437568 HV* 11 23 35.4860798003 -19 25 23.627205601           ~ 1 0
23 Gaia DR3 3546567427903076736 HV* 11 25 31.6301763663 -17 23 15.312818941           ~ 1 0
24 Gaia DR2 3793377208170393984 Pe* 11 33 56.8129350624 -02 28 20.911299410           F7 4 0
25 LAMOST J115209.12+120258.0 HV* 11 52 09.12 +12 02 58.1           ~ 9 0
26 SMSS J115652.95+005401.3 Pe* 11 56 52.9561251886 +00 54 01.103500613           G2 5 0
27 UCAC4 448-054567 Pe* 12 30 08.3761366878 -00 27 24.748105298   14.856 14.447 14.453   ~ 2 0
28 Gaia DR3 3525665333900712832 Pe* 12 52 20.7877658397 -13 48 06.435060338           ~ 2 0
29 Gaia DR3 3504215064633606912 HV* 13 04 34.6752262771 -22 56 12.530072822           ~ 1 0
30 Gaia DR3 3504370095773053696 HV* 13 13 10.4027602403 -23 08 39.546031768           ~ 1 0
31 Gaia DR3 3631125674577631104 HV* 13 22 55.2541880866 -07 41 44.525626759           ~ 1 0
32 2MASS J13291355-0751185 Pe* 13 29 13.5466439468 -07 51 18.609406354           ~ 2 0
33 2MASS J13295431-0717142 Pe* 13 29 54.3115476786 -07 17 14.317530093           ~ 3 0
34 Gaia DR3 3630970956971494912 HV* 13 34 38.7473283685 -06 34 04.759467602           ~ 1 0
35 Gaia DR3 3657056526743053952 HV* 13 52 31.2678901306 -03 47 24.886720853           ~ 1 0
36 Gaia DR3 3619582352969797888 HV* 13 53 23.6424510104 -07 04 19.915886051           ~ 1 0
37 Gaia DR3 3612818501033473664 HV* 13 54 22.2649972062 -11 56 39.854513278           ~ 1 0
38 Gaia DR3 3620532502815040768 HV* 13 55 56.1126228204 -05 54 43.436128901           ~ 1 0
39 SDSS J135648.43-083604.6 Pe* 13 56 48.4347576990 -08 36 04.310566128           F5 3 0
40 Gaia DR3 6270952693712299008 HV* 14 17 43.9943550377 -25 44 28.787802836           ~ 1 0
41 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
42 Gaia DR3 4235951322918940928 HV* 20 00 42.3283092899 -01 16 02.123316998           ~ 1 0
43 Gaia DR3 4236552309105405824 HV* 20 05 10.6134598145 -00 10 46.247037323           ~ 1 0
44 Gaia DR3 4242563614044957696 HV* 20 17 21.0394908299 +01 02 14.172121378           ~ 1 0
45 Gaia DR3 4229238598267973376 HV* 20 22 00.9531095190 -01 18 51.966348856           ~ 1 0
46 Gaia DR3 4227521019370523648 HV* 20 54 02.1890947086 +00 04 07.132400983           ~ 1 0
47 Gaia DR3 6478219813895286912 HV* 20 55 37.4626417826 -49 54 41.228437821           ~ 1 0
48 BPS CS 30314-0039 HV* 20 58 02.8491290136 -36 15 49.172104512   14.62 14.06 13.99   ~ 2 0
49 Gaia DR3 6917206978109246080 HV* 21 01 33.2703755363 -01 03 09.268902280           ~ 1 0
50 UCAC4 204-180886 Pe* 21 02 27.5014456660 -49 21 47.794084389   14.317 13.793 13.833   ~ 3 0
51 Gaia DR3 2690227738799604224 Pe* 21 05 56.7198029002 +00 29 31.178829518           ~ 2 0
52 Gaia DR3 6790795542148925952 HV* 21 15 36.3340026967 -26 53 05.457872423           ~ 1 0
53 Gaia DR3 6776360157068155520 HV* 21 16 16.3734514066 -35 54 47.999423566           ~ 1 0
54 Gaia DR3 6580745253096436224 HV* 21 17 01.7271238972 -41 40 56.360889088           ~ 1 0
55 Gaia DR3 6790317563828425728 HV* 21 17 08.1838878359 -28 14 35.913706881           ~ 1 0
56 Gaia DR3 6782909879114518016 Pe* 21 23 44.2612861505 -33 20 02.453730423           ~ 2 0
57 Gaia DR3 6785833613675654912 HV* 21 28 12.6498724512 -30 42 57.621881984           ~ 1 0
58 Gaia DR3 6785190193214463872 HV* 21 31 50.1235462618 -30 37 36.655101918           ~ 1 0
59 UCAC4 223-190814 HV* 21 33 01.0091336535 -45 28 59.181269291   14.551 13.279 13.008   ~ 3 0
60 Gaia DR3 2688509099045891200 HV* 21 33 52.8445293495 +01 15 45.017986150           ~ 1 0
61 Gaia DR3 2688149803556948992 HV* 21 35 31.4105008851 +00 40 43.991611830           G2 2 0
62 Gaia DR3 6617426988221664640 HV* 21 49 01.3847502030 -29 18 59.120701440           ~ 1 0
63 TYC 6957-842-1 Pe* 22 00 21.9058134552 -25 02 22.471286856   12.87 12.44     ~ 2 0
64 SMSS J220455.53-272041.6 Pe* 22 04 55.5162478194 -27 20 41.515471428           ~ 2 0
65 UCAC4 323-223241 Pe* 22 16 16.4368765247 -25 33 37.895614137   13.855 13.216 13.156   ~ 4 0
66 Gaia DR3 2652780576075420544 HV* 22 43 22.7832078271 -01 30 55.104539748           ~ 3 0
67 Gaia DR3 6503261122497594624 HV* 22 47 13.0807230562 -59 33 34.837444122           ~ 1 0
68 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0
69 NAME Galactic Bar reg ~ ~           ~ 1458 0

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