2011ApJ...732..108J

Query : 2011ApJ...732..108J

2011ApJ...732..108J - Astrophys. J., 732, 108 (2011/May-2)

Alpha enhancement and the metallicity distribution function of Plaut's window.

JOHNSON C.I., RICH R.M., FULBRIGHT J.P., VALENTI E. and McWILLIAM A.

Abstract (from CDS):

We present Fe, Si, and Ca abundances for 61 giants in Plaut's window (l = -1°, b = -8°.5) and Fe abundances for an additional 31 giants in a second, nearby field (l = 0°, b = -8°) derived from high-resolution (R ~ 25,000) spectra obtained with the Blanco 4 m telescope and Hydra multifiber spectrograph. The median metallicity of red giant branch (RGB) stars in the Plaut's field is ∼0.4 dex lower than those in Baade's window, and confirms the presence of an iron abundance gradient along the bulge minor axis. The full metallicity range of our (biased) RGB sample spans -1.5 < [Fe/H] < +0.3, which is similar to that found in other bulge fields. We also derive a photometric metallicity distribution function for RGB stars in the (l = -1°, b = -8°.5) field and find very good agreement with the spectroscopic metallicity distribution. The radial velocity (RV) and dispersion data for the bulge RGB stars are in agreement with previous results of the Bulge Radial Velocity Assay survey, and we find evidence for a decreasing velocity dispersion with increasing [Fe/H]. The [α/Fe] enhancement in Plaut field stars is nearly identical to that observed in Baade's window, and suggests that an [α/Fe] gradient does not exist between b = -4° and -8°. Additionally, a subset of our sample (23 stars) appears to be foreground red clump stars that are very metal rich, exhibit small metallicity and RV dispersions, and are enhanced in α elements. While these stars likely belong to the Galactic inner disk population, they exhibit [α/Fe] ratios that are enhanced above the thin and thick disk.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: abundances - Galaxy: bulge - stars: abundances - stars: Population II

VizieR on-line data: <Available at CDS (J/ApJ/732/108): table1.dat table2.dat>

Simbad objects: 105

goto Full paper

goto View the references in ADS

Number of rows : 105
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
3 * mu. Leo PM* 09 52 45.8170136628 +26 00 25.024269924 6.50 5.10 3.88 2.97 2.39 K2IIIbCN1Ca1 479 0
4 NGC 4565 Sy2 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 991 0
5 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
6 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
7 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
8 NAME Baade Window reg 18 03.5 -30 01           ~ 643 3
9 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 561 0
10 2MASS J18172965-3402573 RG* 18 17 29.6514958608 -34 02 57.381552708     14.403     ~ 2 0
11 2MASS J18172979-3401118 * 18 17 29.7890924640 -34 01 11.876692080     13.507     ~ 2 0
12 2MASS J18173118-3358318 * 18 17 31.1771071464 -33 58 31.899190476     14.225     ~ 2 0
13 2MASS J18173180-3300124 RG* 18 17 31.8007748856 -33 00 12.429962640     13.960     ~ 1 0
14 2MASS J18173180-3349197 RG* 18 17 31.8016449600 -33 49 19.744862628     14.328     ~ 2 0
15 2MASS J18173251-3354539 RG* 18 17 32.5179540144 -33 54 54.010749852     14.271     ~ 2 0
16 2MASS J18173554-3405009 RG* 18 17 35.5398956928 -34 05 00.970397232     13.674     ~ 2 0
17 2MASS J18173706-3405569 * 18 17 37.0598054688 -34 05 56.971298004     14.581     ~ 2 0
18 [TGB2011] J181737.5752-325607.608 RG* 18 17 37.5721502616 -32 56 07.476245772     14.6     ~ 2 0
19 2MASS J18173994-3358331 RG* 18 17 39.9441658512 -33 58 33.188830716     14.774     ~ 2 0
20 2MASS J18174000-3406266 * 18 17 40.0031376480 -34 06 26.714698128     13.254     ~ 2 0
21 2MASS J18174067-3356000 * 18 17 40.6760504256 -33 55 59.989455444     12.582     ~ 2 0
22 2MASS J18174303-3355118 RG* 18 17 43.0387186824 -33 55 11.875671552     14.265     ~ 2 0
23 2MASS J18174304-3357006 RG* 18 17 43.0487606304 -33 57 00.699643908     13.662     ~ 2 0
24 2MASS J18174351-3401412 RG* 18 17 43.5177278040 -34 01 41.221415496     13.879     ~ 2 0
25 2MASS J18174386-3244555 RG* 18 17 43.8657677496 -32 44 55.519025928     13.850     ~ 1 0
26 2MASS J18174478-3343290 * 18 17 44.7819674040 -33 43 29.031350052     14.047     ~ 2 0
27 2MASS J18174532-3353235 RG* 18 17 45.3298477536 -33 53 23.569406016     13.957 13.63   ~ 12 0
28 2MASS J18174571-3259300 RG* 18 17 45.7187248224 -32 59 30.082940988     14.320     ~ 1 0
29 [TGB2011] J181746.8914-325753.094 RG* 18 17 46.8829275504 -32 57 53.041648968     14.6     ~ 2 0
30 2MASS J18174742-3348098 RG* 18 17 47.427 -33 48 09.84     14.710     ~ 3 0
31 2MASS J18174798-3359361 * 18 17 47.9807999328 -33 59 36.116293056     13.733     ~ 2 0
32 2MASS J18174891-3406031 * 18 17 48.9179540952 -34 06 03.164580432     13.505     ~ 2 0
33 [TGB2011] J181748.9838-324712.739 RG* 18 17 49.0010176680 -32 47 12.824924748     14.5     ~ 2 0
34 2MASS J18174929-3347192 * 18 17 49.3005097320 -33 47 19.272151932     14.046     ~ 2 0
35 2MASS J18174935-3404217 RG* 18 17 49.3525565784 -34 04 21.697173444     13.777     ~ 2 0
36 2MASS J18174941-3353025 RG* 18 17 49.4192041416 -33 53 02.601881952     14.329     ~ 2 0
37 2MASS J18175546-3404103 * 18 17 55.4646739968 -34 04 10.334642520     12.960     ~ 2 0
38 2MASS J18175567-3343063 RG* 18 17 55.6758220920 -33 43 06.362863968     14.123     ~ 2 0
39 2MASS J18175593-3400000 RG* 18 17 55.9349453136 -34 00 00.031547160     14.053     ~ 2 0
40 2MASS J18175652-3347050 RG* 18 17 56.5215417864 -33 47 05.077265784     13.855     ~ 2 0
41 [TGB2011] J181756.7047-324655.196 RG* 18 17 56.7020555184 -32 46 55.097436000     14.6     ~ 2 0
42 2MASS J18180012-3358096 RG* 18 18 00.1250089392 -33 58 09.689739456     13.848     ~ 2 0
43 [TGB2011] J181800.5000-324646.238 RG* 18 18 00.499 -32 46 46.23     14.6     ~ 2 0
44 2MASS J18180218-3241380 RG* 18 18 02.1844826832 -32 41 38.037729984     14.410     ~ 1 0
45 2MASS J18180285-3342004 RG* 18 18 02.8544333880 -33 42 00.466517484     14.570     ~ 2 0
46 2MASS J18180301-3405313 RG* 18 18 03.0109805136 -34 05 31.347845736     13.896     ~ 2 0
47 [TGB2011] J181803.0339-325632.443 RG* 18 18 03.0336736665 -32 56 32.250479203     14.7     ~ 2 0
48 2MASS J18180502-3355071 * 18 18 05.0210455128 -33 55 07.158249516     13.877     ~ 2 0
49 2MASS J18180550-3407117 RG* 18 18 05.5034853216 -34 07 11.822281644     13.963     ~ 2 0
50 2MASS J18180562-3346548 RG* 18 18 05.6303827248 -33 46 54.812767512     14.293     ~ 2 0
51 2MASS J18180831-3405309 RG* 18 18 08.3130156072 -34 05 30.978147948     13.601     ~ 2 0
52 NAME Plaut's Window reg 18 18 08.32 -32 51 35.7           ~ 18 0
53 2MASS J18180979-3351416 RG* 18 18 09.7964370720 -33 51 41.662671228     13.107     ~ 2 0
54 2MASS J18180991-3403206 RG* 18 18 09.911 -34 03 20.64     13.839     ~ 2 0
55 2MASS J18181033-3352390 * 18 18 10.3301274240 -33 52 39.122043744     13.787     ~ 2 0
56 2MASS J18181293-3240588 RG* 18 18 12.9375748584 -32 40 58.858551264     14.070     ~ 1 0
57 2MASS J18181322-3402227 * 18 18 13.2268396176 -34 02 22.738074396     13.350     ~ 2 0
58 2MASS J18181435-3350275 RG* 18 18 14.3515968816 -33 50 27.461052816     13.786     ~ 2 0
59 2MASS J18181512-3353545 RG* 18 18 15.1229512272 -33 53 54.576101400     14.463     ~ 2 0
60 2MASS J18181521-3352294 RG* 18 18 15.2144713032 -33 52 29.439145848     13.533     ~ 2 0
61 [TGB2011] J181816.6087-325245.171 RG* 18 18 16.5982590624 -32 52 44.986607184     14.7     ~ 2 0
62 2MASS J18181710-3401088 * 18 18 17.1029033544 -34 01 08.862137652     14.395     ~ 3 0
63 2MASS J18181783-3300021 RG* 18 18 17.8359350448 -33 00 02.158556076     14.200     ~ 1 0
64 2MASS J18181924-3350222 RG* 18 18 19.2448668984 -33 50 22.132937688     14.360     ~ 2 0
65 2MASS J18181929-3404128 RG* 18 18 19.2976764168 -34 04 12.824467608     13.729     ~ 2 0
66 2MASS J18182052-3345251 * 18 18 20.5299375984 -33 45 25.088081040     13.800     ~ 2 0
67 [TGB2011] J181820.6605-324845.446 RG* 18 18 20.6516509680 -32 48 45.294430032     14.6     ~ 2 0
68 2MASS J18182073-3353250 * 18 18 20.7323172504 -33 53 25.149274800     14.509     ~ 2 0
69 2MASS J18182089-3348425 * 18 18 20.8915666416 -33 48 42.544956348     14.284     ~ 2 0
70 2MASS J18182256-3401248 RG* 18 18 22.5652475040 -34 01 24.835000728     13.265     ~ 2 0
71 2MASS J18182430-3352453 RG* 18 18 24.2983519968 -33 52 45.341772780     13.900     ~ 2 0
72 2MASS J18182457-3344533 * 18 18 24.5743801800 -33 44 53.370371904     14.158     ~ 2 0
73 2MASS J18182470-3342166 RG* 18 18 24.7025394432 -33 42 16.586771580     14.069     ~ 2 0
74 2MASS J18182472-3352044 RG* 18 18 24.7262442672 -33 52 04.411364988     13.858     ~ 2 0
75 [TGB2011] J181824.9581-325030.753 RG* 18 18 24.9412147200 -32 50 30.950860416     14.6     ~ 2 0
76 2MASS J18182553-3349465 * 18 18 25.5311687520 -33 49 46.551789480     14.281     ~ 3 0
77 2MASS J18182612-3353431 * 18 18 26.1234058296 -33 53 43.149437592     14.319     ~ 2 0
78 [TGB2011] J181826.3745-325326.936 RG* 18 18 26.3669834832 -32 53 26.776847400     13.9     ~ 2 0
79 [TGB2011] J181826.7592-324829.633 RG* 18 18 26.7526716936 -32 48 29.598888096     13.9     ~ 2 0
80 [TGB2011] J181827.2069-325432.135 RG* 18 18 27.1998117168 -32 54 31.890883824     14.9     ~ 2 0
81 2MASS J18182740-3356447 * 18 18 27.4001489952 -33 56 44.708928900     14.387     ~ 2 0
82 2MASS J18182918-3341405 RG* 18 18 29.1809310792 -33 41 40.593223788     13.813     ~ 2 0
83 2MASS J18183098-3358070 * 18 18 30.9789613128 -33 58 07.068195336     13.511     ~ 2 0
84 2MASS J18183369-3352038 * 18 18 33.6984068544 -33 52 03.894133008     13.758     ~ 2 0
85 2MASS J18183521-3344124 RG* 18 18 35.2066440768 -33 44 12.397865136     14.451     ~ 2 0
86 2MASS J18183604-3342349 RG* 18 18 36.0446587776 -33 42 34.898193036     13.431     ~ 2 0
87 [TGB2011] J181836.4549-325424.977 RG* 18 18 36.4463278704 -32 54 24.914629440     14.7     ~ 2 0
88 [TGB2011] J181836.7979-325145.621 RG* 18 18 36.7924740192 -32 51 45.506299248     14.3     ~ 3 0
89 2MASS J18183802-3355441 RG* 18 18 38.0187592416 -33 55 44.254999992     13.983     ~ 2 0
90 2MASS J18183876-3403092 RG* 18 18 38.7657231288 -34 03 09.195779088     14.120     ~ 2 0
91 2MASS J18183930-3353425 RG* 18 18 39.3018110784 -33 53 42.606114144     14.466     ~ 2 0
92 [TGB2011] J181842.9745-324808.757 RG* 18 18 42.9694033248 -32 48 08.673971580     14.5     ~ 2 0
93 [TGB2011] J181844.9728-325614.671 RG* 18 18 44.9654948688 -32 56 14.559045504     14.4     ~ 2 0
94 2MASS J18184583-3240045 RG* 18 18 45.8372902824 -32 40 04.537885404     14.180     ~ 1 0
95 [TGB2011] J181847.9588-325709.782 RG* 18 18 47.9555073120 -32 57 09.669823020     14.5     ~ 2 0
96 2MASS J18184867-3242133 RG* 18 18 48.6764861568 -32 42 13.280746824     13.930     ~ 1 0
97 2MASS J18185079-3259346 RG* 18 18 50.7953400984 -32 59 34.673963892     14.010     ~ 1 0
98 2MASS J18185164-3243594 RG* 18 18 51.6410256744 -32 43 59.442092688     14.280     ~ 1 0
99 [TGB2011] J181857.4487-324752.704 RG* 18 18 57.4424665344 -32 47 52.608086952     14.2     ~ 2 0
100 [TGB2011] J181859.0762-324951.182 RG* 18 18 59.0676789480 -32 49 51.120094368     14.6     ~ 2 0
101 2MASS J18185946-3240274 RG* 18 18 59.4652161264 -32 40 27.395739300     13.960     ~ 1 0
102 [TGB2011] J181859.4685-324605.473 RG* 18 18 59.4718764504 -32 46 05.435198832     14.6     ~ 2 0
103 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
104 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0
105 NAME Galactic Bulge reg ~ ~           ~ 4794 0

To bookmark this query, right click on this link: simbad:objects in 2011ApJ...732..108J and select 'bookmark this link' or equivalent in the popup menu