2020MNRAS.492.3241V

Query : 2020MNRAS.492.3241V

2020MNRAS.492.3241V - Mon. Not. R. Astron. Soc., 492, 3241-3262 (2020/March-1)

The Pristine survey - IX. CFHT ESPaDOnS spectroscopic analysis of 115 bright metal-poor candidate stars.

VENN K.A., KIELTY C.L., SESTITO F., STARKENBURG E., MARTIN N., AGUADO D.S., ARENTSEN A., BONIFACIO P., CAFFAU E., HILL V., JABLONKA P., LARDO C., MASHONKINA L., NAVARRO J.F., SNEDEN C., THOMAS G., YOUAKIM K., GONZALEZ-HERNANDEZ J.I., SANCHEZ JANSSEN R., CARLBERG R. and MALHAN K.

Abstract (from CDS):

A chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT high-resolution ESPaDOnS spectroscopy. We have discovered 28 new bright (V < 15) stars with [Fe/H] < -2.5 and 5 with [Fe/H] < -3.0 for success rates of 40 (28/70) and 19 per cent (5/27), respectively. A detailed model atmosphere analysis is carried out for the 28 new metal-poor stars. Stellar parameters were determined from SDSS photometric colours, Gaia DR2 parallaxes, MESA/MIST stellar isochrones, and the initial Pristine survey metallicities, following a Bayesian inference method. Chemical abundances are determined for 10 elements (Na, Mg, Ca, Sc, Ti, Cr, Fe, Ni, Y, and Ba). Most stars show chemical abundance patterns that are similar to the normal metal-poor stars in the Galactic halo; however, we also report the discoveries of a new r-process-rich star, a new CEMP-s candidate with [Y/Ba] > 0, and a metal-poor star with very low [Mg/Fe]. The kinematics and orbits for all of the highly probable metal-poor candidates are determined by combining our precision radial velocities with Gaia DR2 proper motions. Some stars show unusual kinematics for their chemistries, including planar orbits, unbound orbits, and highly elliptical orbits that plunge deeply into the Galactic bulge (Rperi < 0.5 kpc); also, eight stars have orbital energies and actions consistent with the Gaia-Enceladus accretion event. This paper contributes to our understanding of the complex chemo-dynamics of the metal-poor Galaxy, and increases the number of known bright metal-poor stars available for detailed nucleosynthetic studies.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Galaxy: stellar content - Galaxy: kinematics and dynamics - Galaxy: abundances - stars: Population II - stars: abundances - stars: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/MNRAS/492/3241): table1.dat table2.dat table4.dat table5.dat table6.dat tablea1.dat>

Nomenclature: Table 1: Pristine JDDD.dddd+DD.dddd N=115.

CDS comments: CS 29249-037 is a misprint for CS 22949-037.

Simbad objects: 134

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Number of rows : 134
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 Tri II G 02 13 17.40 +36 10 42.4           ~ 164 0
2 SDSS J022226.20-031338.0 Pe* 02 22 26.2023177312 -03 13 38.002037052           CEMP 7 0
3 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
4 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 998 0
5 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
6 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
7 UCAC3 215-112497 Pe* 10 29 15.1489854864 +17 29 27.924626724   17.424 16.708   15.98 sdA 120 0
8 SDSS J120052.94+093405.7 Pe* 12 00 52.9426259470 +09 34 05.747944956           ~ 3 0
9 SDSS J120130.94+005649.3 Pe* 12 01 30.9532620279 +00 56 49.349970409           ~ 2 0
10 2MASS J12031003+0324304 Pe* 12 03 10.0375207729 +03 24 30.387052811           ~ 4 0
11 SDSS J120453.84+072457.5 Pe* 12 04 53.8486103328 +07 24 57.529821052           ~ 2 0
12 SDSS J120523.12+114011.1 Pe* 12 05 23.1347758200 +11 40 11.206819402           ~ 2 0
13 SDSS J120528.76+114548.9 Pe* 12 05 28.7735756106 +11 45 48.932279513           ~ 3 0
14 SDSS J120545.48+013745.9 Pe* 12 05 45.4836310094 +01 37 46.035644746           ~ 4 0
15 SDSS J120646.89+134827.3 Pe* 12 06 46.8960552085 +13 48 27.336597400           ~ 2 0
16 SDSS J120840.08+032837.7 Pe* 12 08 40.0908323039 +03 28 37.838551116           ~ 2 0
17 SDSS J121002.14+034259.3 Pe* 12 10 02.1479258757 +03 42 59.394752843           ~ 2 0
18 SDSS J121008.72+005635.2 Pe* 12 10 08.7431865697 +00 56 35.621635833           ~ 3 0
19 SDSS J121124.28+140934.1 Pe* 12 11 24.2792195647 +14 09 34.207855571           ~ 2 0
20 SDSS J121444.39+045143.0 Pe* 12 14 44.3962999650 +04 51 43.112992336           ~ 3 0
21 SDSS J122138.69+072840.1 Pe* 12 21 38.7070441202 +07 28 40.201352112           ~ 3 0
22 2MASS J12312419+1327214 Pe* 12 31 24.1973513136 +13 27 21.403501848   13.7 13.3     ~ 4 0
23 SDSS J123154.86+084345.8 Pe* 12 31 54.8657563552 +08 43 45.880833641           ~ 2 0
24 SDSS J123230.33+084626.5 Pe* 12 32 30.3341587538 +08 46 26.531186228           ~ 2 0
25 SDSS J123946.77+113312.5 Pe* 12 39 46.7784626825 +11 33 12.654052559           ~ 2 0
26 SDSS J124219.30+125127.9 Pe* 12 42 19.3016017165 +12 51 27.928517991           ~ 2 0
27 SDSS J124231.51+083049.4 Pe* 12 42 31.5212051554 +08 30 49.503532887           ~ 2 0
28 SDSS J124850.69+155534.5 Pe* 12 48 50.6906700513 +15 55 34.585243305           ~ 2 0
29 SDSS J125124.74+154911.3 Pe* 12 51 24.7463147325 +15 49 11.432424872           ~ 2 0
30 SDSS J125227.82+080320.4 Pe* 12 52 27.8182424570 +08 03 20.721524356           ~ 3 0
31 SDSS J125412.77+113013.4 Pe* 12 54 12.7811635058 +11 30 13.396319464           ~ 2 0
32 SDSS J125521.36+112454.0 Pe* 12 55 21.3625019621 +11 24 54.061579432           ~ 2 0
33 SDSS J130530.11+083049.7 Pe* 13 05 30.1163066709 +08 30 49.800054540           ~ 3 0
34 SDSS J130538.80+141903.4 Pe* 13 05 38.8034962947 +14 19 03.602184313           ~ 2 0
35 SDSS J130610.87+120716.0 Pe* 13 06 10.8690363199 +12 07 16.299994869           kA2hA4mA7 3 0
36 SDSS J130624.34+154036.4 Pe* 13 06 24.3564134088 +15 40 36.498437652           ~ 3 0
37 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2683 0
38 SDSS J131156.67+122128.0 Pe* 13 11 56.6792499701 +12 21 28.059143752           ~ 2 0
39 SDSS J131411.64+112444.7 Pe* 13 14 11.6568170334 +11 24 44.887826608           ~ 2 0
40 SDSS J131942.45+082253.6 Pe* 13 19 42.4548719977 +08 22 53.558027685           ~ 2 0
41 2MASS J13202397+1343224 Pe* 13 20 23.9804419662 +13 43 22.362383570           ~ 6 0
42 SDSS J132207.16+085836.4 Pe* 13 22 07.1630288517 +08 58 36.588400834           ~ 2 0
43 SDSS J132302.88+092615.1 Pe* 13 23 02.8847791798 +09 26 15.269375465           ~ 2 0
44 SDSS J132427.80+152617.3 Pe* 13 24 27.8095318123 +15 26 17.407496135           ~ 2 0
45 SDSS J132529.58+082704.6 Pe* 13 25 29.5903558724 +08 27 04.645149474           ~ 1 0
46 2MASS J13272910+0710520 Pe* 13 27 29.1132161848 +07 10 51.981057570           ~ 3 0
47 SDSS J132922.44+131344.8 Pe* 13 29 22.4510500913 +13 13 44.849487429           ~ 2 0
48 SDSS J133307.95+133757.4 Pe* 13 33 07.9500317363 +13 37 57.504196644           ~ 4 0
49 SDSS J133936.18+103304.6 Pe* 13 39 36.1863121608 +10 33 04.808046960           A0 8 0
50 SDSS J134032.20+134924.3 Pe* 13 40 32.2134973141 +13 49 24.334808882           ~ 3 0
51 2MASS J13431515+1522599 Pe* 13 43 15.1535714376 +15 22 59.806249932           ~ 3 0
52 2MASS J13452369+0918358 Pe* 13 45 23.6912569278 +09 18 35.980945274           sdA 4 0
53 SDSS J135159.07+011046.0 Pe* 13 51 59.0681543986 +01 10 46.036907544           ~ 2 0
54 SDSS J135219.17+042536.0 Pe* 13 52 19.1743866470 +04 25 36.077352020           ~ 3 0
55 SDSS J135650.95+013139.1 Pe* 13 56 50.9580289064 +01 31 39.152491166           ~ 2 0
56 BPS CS 30320-0069 Pe* 13 58 52.2722883408 +10 51 40.541217084   15.04 14.60 14.54   ~ 8 0
57 SDSS J135944.73+155530.5 Pe* 13 59 44.7331001314 +15 55 30.580905027           ~ 3 0
58 SDSS J140003.99+143744.1 Pe* 14 00 03.9893060225 +14 37 44.133855453           ~ 2 0
59 HD 122563 Pe* 14 02 31.8455084952 +09 41 09.944391876 7.47 7.10 6.19 5.37 4.79 G8:III:Fe-5 920 0
60 SDSS J140300.10+124627.7 Pe* 14 03 00.1030779072 +12 46 27.835234312           ~ 2 0
61 SDSS J140327.18+081047.1 Pe* 14 03 27.1833445022 +08 10 47.155183730           ~ 3 0
62 SDSS J140506.37+101940.8 Pe* 14 05 06.3836148912 +10 19 41.058524820     14.708     ~ 4 0
63 SDSS J140652.18+153305.6 Pe* 14 06 52.1951313902 +15 33 05.697956150           ~ 2 0
64 2MASS J14102002+1032113 Pe* 14 10 20.0321546520 +10 32 11.311197360   14.92 14.41     ~ 4 0
65 LINEAR 10946515 RR* 14 13 07.5297835848 +14 53 54.003046308     14.42     ~ 16 0
66 SDSS J141509.08+082523.7 Pe* 14 15 09.0834516978 +08 25 23.867945096           ~ 4 0
67 2MASS J14181337+0728011 Pe* 14 18 13.3770833615 +07 28 01.401191946           ~ 4 0
68 SDSS J142226.90+150058.6 Pe* 14 22 26.9031229035 +15 00 58.638725734           ~ 2 0
69 SDSS J142242.79+074134.4 Pe* 14 22 42.8000332537 +07 41 34.556900271           ~ 2 0
70 SDSS J142429.86+101248.6 Pe* 14 24 29.8729433641 +10 12 48.738361007           ~ 3 0
71 SDSS J142932.68+150954.1 Pe* 14 29 32.6825334648 +15 09 54.294268608           ~ 3 0
72 SDSS J143018.86+140216.6 Pe* 14 30 18.8674276824 +14 02 16.634880816     14.494     ~ 5 0
73 SDSS J143034.64+155748.1 Pe* 14 30 34.6493990088 +15 57 48.239993844     14.851     ~ 4 0
74 SDSS J143342.15+073116.8 Pe* 14 33 42.1538356368 +07 31 16.882775112     14.187     ~ 4 0
75 SDSS J143350.93+102205.9 Pe* 14 33 50.9282922649 +10 22 05.967214211           ~ 2 0
76 UCAC4 499-060797 Pe* 14 47 30.7354565160 +09 47 03.729292980   17.04 16.36     ~ 16 0
77 SDSS J145406.57+110807.0 Pe* 14 54 06.5768721330 +11 08 07.071645304           ~ 3 0
78 SDSS J150909.24+012135.1 Pe* 15 09 09.2426658914 +01 21 35.124930175           ~ 1 0
79 SDSS J151350.56+082119.0 Pe* 15 13 50.5704806702 +08 21 19.260995399           ~ 2 0
80 SDSS J151437.37+090529.1 Pe* 15 14 37.3801606096 +09 05 29.218388897           ~ 2 0
81 SDSS J151515.82+001319.8 Pe* 15 15 15.8205913800 +00 13 19.802419404           ~ 3 0
82 SDSS J151609.81+101807.1 Pe* 15 16 09.81699 +10 18 07.0627           ~ 2 0
83 SDSS J151629.24+005432.1 Pe* 15 16 29.2461672945 +00 54 32.188119242           ~ 3 0
84 SDSS J151933.87+000638.1 Pe* 15 19 33.8734309704 +00 06 38.160537480     14.095     ~ 4 0
85 SDSS J152151.89+063130.5 Pe* 15 21 51.8938750824 +06 31 30.659939508     14.165     ~ 6 0
86 SDSS J152407.64+062911.9 Pe* 15 24 07.6424217264 +06 29 12.001596612     14.255     ~ 5 0
87 SDSS J153046.94+082021.2 Pe* 15 30 46.9497924430 +08 20 21.373897480           ~ 2 0
88 SDSS J153112.94+060704.1 Pe* 15 31 12.9410352240 +06 07 04.094855328     14.763     ~ 5 0
89 SDSS J153417.51+062812.8 Pe* 15 34 17.5094589984 +06 28 12.798557004           ~ 4 0
90 SDSS J153543.48+093334.5 Pe* 15 35 43.4935091373 +09 33 34.410846296           ~ 2 0
91 SDSS J153745.57+123743.1 Pe* 15 37 45.5741135399 +12 37 43.109606905           ~ 1 0
92 SDSS J154034.75+084446.9 Pe* 15 40 34.7522202936 +08 44 47.114914704     14.582     ~ 5 0
93 SDSS J154301.87+090000.0 Pe* 15 43 01.8850503895 +08 59 59.960039252           ~ 3 0
94 SDSS J154353.04+091111.1 Pe* 15 43 53.0543668989 +09 11 11.336927936           ~ 2 0
95 SDSS J154418.31+040258.7 Pe* 15 44 18.3186354682 +04 02 58.794093631           ~ 1 0
96 SDSS J154425.63+103151.9 Pe* 15 44 25.6326998466 +10 31 51.958591630           ~ 4 0
97 SDSS J154556.31+104125.2 Pe* 15 45 56.3126062974 +10 41 25.190715012           ~ 2 0
98 SDSS J154651.32+093630.3 Pe* 15 46 51.3195209616 +09 36 30.427952796     14.444     ~ 4 0
99 SDSS J155117.90+100833.6 Pe* 15 51 17.9150441616 +10 08 33.742191012     15.082     ~ 5 0
100 SDSS J155120.25+103524.4 Pe* 15 51 20.2628973296 +10 35 24.559612501           ~ 2 0
101 SDSS J155150.39+152407.9 Pe* 15 51 50.3951591287 +15 24 08.083234221           ~ 2 0
102 NAME Draco II Gl? 15 52 47.6 +64 33 55           ~ 138 0
103 SDSS J160008.16+134940.4 Pe* 16 00 08.1609250048 +13 49 40.522149608           ~ 2 0
104 SDSS J160141.19+094033.9 Pe* 16 01 41.1928942704 +09 40 33.978969444     14.765     ~ 5 0
105 SDSS J160428.46+092456.3 Pe* 16 04 28.4633187696 +09 24 56.375687052     14.482     ~ 5 0
106 SDSS J162026.30+085340.8 Pe* 16 20 26.3088433608 +08 53 40.864863444     14.184     ~ 4 0
107 SDSS J162145.29+085943.5 Pe* 16 21 45.3000548065 +08 59 43.644628362           ~ 2 0
108 SDSS J162217.93+065303.9 Pe* 16 22 17.9307088126 +06 53 03.964966312           ~ 4 0
109 SDSS J162320.54+135239.7 Pe* 16 23 20.5392344472 +13 52 39.786688524           ~ 3 0
110 SDSS J162603.47+055857.4 EB* 16 26 03.4736891095 +05 58 57.406836420           ~ 2 0
111 SDSS J162726.11+121909.5 Pe* 16 27 26.1184100543 +12 19 09.586807751           ~ 2 0
112 NAME Hercules Dwarf Galaxy G 16 31 02.0 +12 47 30     14.0     ~ 379 1
113 BPS CS 22878-0003 Pe* 16 33 45.4538763624 +07 55 22.681488108   14.95 14.46 14.36   ~ 7 0
114 SDSS J163359.00+150439.2 Pe* 16 33 59.0037541507 +15 04 39.333184743           ~ 2 0
115 SDSS J164247.11+082227.4 Pe* 16 42 47.1178143672 +08 22 27.490887048           ~ 3 0
116 SDSS J164330.93+120636.4 Pe* 16 43 30.9322162487 +12 06 36.449910667           ~ 2 0
117 SDSS J164537.97+122156.4 Pe* 16 45 37.9738621128 +12 21 56.384241084     14.853     ~ 6 0
118 SDSS J164839.34+150353.1 Pe* 16 48 39.3396256901 +15 03 53.148842872           ~ 2 0
119 SDSS J164940.79+123851.7 Pe* 16 49 40.7882323788 +12 38 51.889791727           ~ 2 0
120 SDSS J164957.79+151754.3 Pe* 16 49 57.9621360421 +15 17 52.315157982           ~ 2 0
121 SDSS J165525.97+154326.4 Pe* 16 55 25.9710917904 +15 43 26.449307904     14.883     ~ 5 0
122 SDSS J165615.67+141609.9 Pe* 16 56 15.6812978191 +14 16 10.013044743           ~ 2 0
123 SDSS J165804.97+152948.8 Pe* 16 58 04.9691150437 +15 29 48.901063734           ~ 2 0
124 SDSS J165811.24+105446.3 Pe* 16 58 11.2523278347 +10 54 46.439836355           ~ 2 0
125 SDSS J165906.23+134914.5 Pe* 16 59 06.2292658685 +13 49 14.538890132           ~ 2 0
126 SDSS J170104.09+145816.4 Pe* 17 01 04.0998517506 +14 58 16.631961279           kA2hA4mA7 3 0
127 SDSS J170213.30+105140.3 Pe* 17 02 13.3111039023 +10 51 40.417169937           ~ 2 0
128 NAME Sagittarius II Gl? 19 52 40.5 -22 04 05           ~ 97 0
129 BPS CS 29498-0043 Pe* 21 03 52.1197651440 -29 42 50.344181712   14.8 13.72 13.013 12.406 CEMP-no 100 0
130 HE 2323-0256 Pe* 23 26 29.8073738880 -02 39 58.036383180   15.125 14.321 14.289 13.358 CEMP-no 184 0
131 NAME Local Group GrG ~ ~           ~ 9325 0
132 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0
133 NAME Galactic Bar reg ~ ~           ~ 1458 0
134 NAME Galactic Bulge reg ~ ~           ~ 4794 0

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