2016ApJ...822L...5M

Query : 2016ApJ...822L...5M

2016ApJ...822L...5M - Astrophys. J., 822, L5-L5 (2016/May-1)

Discovery of an extraordinary number of red supergiants in the inner Galaxy.

MESSINEO M., ZHU Q., MENTEN K.M., IVANOV V.D., FIGER D.F., KUDRITZKI R.-P. and ROSIE CHEN C.-H.

Abstract (from CDS):

In this Letter, we present a search for Galactic red supergiant stars (RSGs) in the direction of the inner Galaxy. A total of 94 targets selected from the 2MASS and GLIMPSE I North catalogs-via their blue extinction-free Q1 and Q2 colors-were spectroscopically observed at infrared wavelengths (in the H- and K-bands at R ∼ 1000), and an extraordinary high detection rate of RSGs ( \gt 61% ) was found. We identified spectroscopically 58 RSGs, based on their flat continua and large equivalent widths of the CO-band at 2.293 µm (EW > 45 Å). This increase corresponds to about 25% of previously known RSGs in the Galactic region 10° < l < 60°, -1.°1 < b < 1.°1. In order to confirm the location of the new RSGs in the inner Galaxy, distances were estimated for a subsample of 47 stars with the clump method and found to range from 3.6 ± 0.4 to 8.6 ± 0.7 kpc. The large new sample will allow us to investigate Galactic metallicity gradients as a function of galactocentric distances and azimuthal angles. Such information is currently an highly disputed issue to constrain models of Galaxy formation and evolution.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): infrared: stars - stars: evolution - supergiants

VizieR on-line data: <Available at CDS (J/ApJ/822/L5): table1.dat>

Nomenclature: Table 1: [MZM2016] NN (Nos 1-94).

Simbad objects: 101

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Number of rows : 101
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 Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
2 IRAS 18055-1803 s*r 18 08 28.1885707944 -18 03 07.559691012           M0.5I 5 0
3 2MASS J18084556-1952549 s*r 18 08 45.5546237832 -19 52 55.055273880           M2.5I 2 0
4 IRAS 18063-1940 s*r 18 09 17.11224 -19 39 58.8096           M2I 4 0
5 2MASS J18112728-1750141 AB* 18 11 27.2903177616 -17 50 14.017320600           M7III: 4 0
6 2MASS J18114736-1929156 AB* 18 11 47.3679172512 -19 29 15.579544416           M2 3 0
7 2MASS J18131562-1801224 AB* 18 13 15.6231178152 -18 01 22.463130540           M1 4 0
8 2MASS J18132341-1858186 AB* 18 13 23.4172977720 -18 58 18.743690784           M4.5III: 4 0
9 ZTF J181336.72-200213.4 AB* 18 13 36.7177831152 -20 02 13.306488828           M5III: 4 0
10 IRAS 18108-1847 AB* 18 13 49.1404188576 -18 46 33.250528308           M7III: 6 0
11 2MASS J18140682-1906204 AB* 18 14 06.8318477448 -19 06 20.470521348           M7III: 3 0
12 2MASS J18144593-1737549 AB* 18 14 45.9315315072 -17 37 55.011114264           M1 3 0
13 2MASS J18145270-1732001 s*r 18 14 52.7040203880 -17 32 00.202939008           M0.5I 3 0
14 2MASS J18151356-1803405 s*r 18 15 13.5255389784 -18 03 41.642329716           M1I 2 0
15 2MASS J18153237-1747220 s*r 18 15 32.3685245904 -17 47 22.004619756           M3I 3 0
16 2MASS J18153375-1809048 s*r 18 15 33.75624 -18 09 04.8060           M0.5I 4 0
17 2MASS J18154112-1646457 AB* 18 15 41.1249817488 -16 46 45.681173796           M1.5 4 0
18 2MASS J18155832-1658278 AB* 18 15 58.3200634896 -16 58 27.905241864           M7III: 4 0
19 IRAS 18131-1523 AB* 18 15 59.6026012152 -15 22 09.132379032           M7III: 3 0
20 2MASS J18165719-1622235 AB* 18 16 57.1959657792 -16 22 23.585632068           M2.5 2 0
21 2MASS J18171598-1405543 AB* 18 17 15.9867684576 -14 05 54.446448372           M7III: 4 0
22 2MASS J18172865-1637399 AB* 18 17 28.6451282520 -16 37 39.972697104           M7III: 4 0
23 2MASS J18174160-1356280 AB* 18 17 41.6007437568 -13 56 28.127879880           M7III: 6 0
24 2MASS J18175212-1715085 AB* 18 17 52.1158426152 -17 15 08.451698040           M2 3 0
25 2MASS J18181255-1629132 AB* 18 18 12.5580946560 -16 29 13.420161132           M1.5 3 0
26 2MASS J18184453-1651089 AB* 18 18 44.53080 -16 51 08.9820           M7III: 3 0
27 2MASS J18184660-1634566 AB* 18 18 46.6053066936 -16 34 56.645333904           M3 3 0
28 2MASS J18191137-1531099 s*r 18 19 11.3757372864 -15 31 10.033841748           M3.5I 3 0
29 IRAS 18165-1709 AB* 18 19 27.2255686392 -17 07 59.433791664           M3.5III: 5 0
30 2MASS J18201613-1627415 AB* 18 20 16.1314537968 -16 27 41.402120976           M7III: 5 0
31 2MASS J18202650-1346486 AB* 18 20 26.5064996760 -13 46 48.770080680           M7III: 3 0
32 IRAS 18181-1325 s*r 18 20 54.6645344208 -13 23 41.724508704           M0.5I 5 0
33 2MASS J18210094-1428209 AB* 18 21 00.9325958880 -14 28 20.939603016           M1.5 3 0
34 2MASS J18210685-1503401 AB* 18 21 06.8608605840 -15 03 40.319989740           M7III: 4 0
35 2MASS J18210846-1532090 AB* 18 21 08.4681455304 -15 32 09.119017536           M5 4 0
36 IRAS 18185-1356 AB* 18 21 24.2747251176 -13 55 28.248495924           M7III: 5 0
37 2MASS J18230108-1225538 AB* 18 23 01.0832647416 -12 25 53.912251200           M7III: 3 0
38 2MASS J18230411-1354160 AB* 18 23 04.1134847496 -13 54 16.106254344           M2 3 0
39 2MASS J18231119-1357580 AB* 18 23 11.2055295624 -13 57 58.089934656           M7III: 4 0
40 2MASS J18240991-1101215 AB* 18 24 09.9057662088 -11 01 21.409599216           M7III: 4 0
41 2MASS J18251120-1140567 AB* 18 25 11.2110780648 -11 40 56.543576016           M2 4 0
42 StRS 190 AB* 18 25 43.8218139504 -11 53 36.864793068       14.83   M7III: 5 0
43 2MASS J18261922-1406487 AB* 18 26 19.2059680512 -14 06 48.849708456           M3 4 0
44 2MASS J18262771-0935189 AB* 18 26 27.7248477168 -09 35 18.872407104       13.91   M5.5III: 4 0
45 2MASS J18273353-1149270 AB* 18 27 33.5420029872 -11 49 26.991606108       15.86   M7III: 2 0
46 2MASS J18291233-1219408 AB* 18 29 12.3444194904 -12 19 40.880343072           M7III: 3 0
47 ZTF J183018.89-102000.2 AB* 18 30 18.8985221736 -10 20 00.284432496           M7III: 6 0
48 2MASS J18310460-1054260 AB* 18 31 04.5996226104 -10 54 26.011852164           M7III: 4 0
49 IRAS 18292-1121 AB* 18 31 58.8173370144 -11 19 21.348222528           M7III: 5 0
50 OGLE GD-LPV-18689 s*r 18 33 28.6964310768 -09 12 09.250502292         15.212 M3I 4 0
51 IRAS 18310-0702 AB* 18 33 44.4468249000 -06 59 47.546715804           M7III: 6 0
52 2MASS J18340471-0907176 s*r 18 34 04.7096592816 -09 07 17.622402060           M0I 3 0
53 2MASS J18340713-0905535 s*r 18 34 07.1279129208 -09 05 53.639474820           M2I 3 0
54 Cl Alicante 8 OpC 18 34 51.0 -07 14 00           ~ 27 0
55 ZTF J183513.46-074458.1 AB* 18 35 13.4677059528 -07 44 58.101865764           M6III: 4 0
56 2MASS J18352902-0721126 AB* 18 35 29.0328577776 -07 21 12.588861240           M2.5 4 1
57 IRAS 18328-0759 AB* 18 35 34.7576656512 -07 56 48.378981696           M7III: 5 0
58 2MASS J18354911-0734430 AB* 18 35 49.1060559168 -07 34 43.460962176           M7III: 3 0
59 2MASS J18355151-0730113 AB* 18 35 51.5138652888 -07 30 11.251959876           M3.5 3 0
60 2MASS J18374651-0712245 AB* 18 37 46.5304429200 -07 12 24.644088324           M1.5 4 0
61 RSGC 1 OpC 18 37 58 -06 53.0           ~ 117 0
62 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 102 0
63 2MASS J18413481-0448579 AB* 18 41 34.8139826856 -04 48 57.976659432           M1.5 3 0
64 2MASS J18414834-0448529 AB* 18 41 48.3447983256 -04 48 52.835972508           M1.5 4 0
65 IRAS 18396-0444 AB* 18 42 17.10720 -04 41 16.9836           M1.5 4 0
66 ZTF J184242.31-044053.6 AB* 18 42 42.3204701064 -04 40 53.532401772           M3 5 0
67 2MASS J18424479-0433573 AB* 18 42 44.7970257120 -04 33 57.491063244           M7III: 4 0
68 2MASS J18425222-0346184 AB* 18 42 52.2300742920 -03 46 18.572477124           M2.5 3 0
69 2MASS J18430800-0356240 AB* 18 43 08.00544 -03 56 24.0504           M2.5 3 0
70 IRAS 18418-0338 AB* 18 44 26.1663616800 -03 35 27.582484596         15.56 M7III: 6 0
71 Cl Alicante 7 OpC 18 44 29.45 -03 30 02.4           ~ 23 0
72 RSGC 3 OpC 18 45 20.0 -03 24 43           ~ 58 0
73 2MASS J18464441-0324049 AB* 18 46 44.4143922648 -03 24 05.078830284           M4 3 0
74 IRAS 18441-0306 AB* 18 46 44.7969124320 -03 03 32.257044108           M2 9 0
75 2MASS J18475357-0147150 AB* 18 47 53.5691533728 -01 47 15.081144468           M2 3 0
76 2MASS J18482997-0211500 AB* 18 48 29.9771144160 -02 11 49.900112052           M1.5 4 0
77 IRAS 18514+0137 AB* 18 53 57.3209451432 +01 41 27.009622752           M6.5III: 4 0
78 IRAS 18520+0149 AB* 18 54 34.4414673360 +01 53 04.529787792           M1 4 0
79 IRAS 18532+0336 s*r 18 55 42.1447140312 +03 40 04.568650644           M0I 5 0
80 IRAS 18544+0130 AB* 18 56 58.4943428448 +01 34 52.095435060           M1 4 0
81 StRS 269 AB* 18 58 04.3398906552 +02 15 41.182107984           M7III: 7 0
82 2MASS J18585383+0500368 AB* 18 58 53.8352174088 +05 00 36.864462672       15.96   M3.5III: 4 0
83 IRAS 18577+0308 AB* 19 00 12.2825085888 +03 12 25.931473308           M7III: 6 0
84 2MASS J19001812+0325413 AB* 19 00 18.1243410432 +03 25 41.353114728           M7III: 4 0
85 2MASS J19021061+0624270 AB* 19 02 10.6022529360 +06 24 27.191451852           M7III: 3 0
86 ZTF J190519.32+060012.4 AB* 19 05 19.3251089856 +06 00 12.428170020           M7III: 5 0
87 ZTF J190520.10+084857.0 s*r 19 05 20.1017096376 +08 48 57.100875120           M0I 5 0
88 IRAS 19036+0719 AB* 19 06 07.1961583704 +07 23 54.564825624           M6III: 7 0
89 IRAS 19037+0554 AB* 19 06 09.3444038208 +05 58 44.438116440           M7III: 7 0
90 IRAS 19080+0813 AB* 19 10 25.6722662016 +08 18 52.469585496           M1 6 0
91 IRAS 19106+0942 AB* 19 12 59.9463169152 +09 48 01.527255612           M7 5 0
92 ZTF J191301.14+100159.5 AB* 19 13 01.1383249416 +10 01 59.568180096           M7III: 6 0
93 IRAS 19118+1022 AB* 19 14 14.1530571216 +10 28 02.462186028           M2.5 6 0
94 ZTF J191432.37+091659.8 s*r 19 14 32.3859051432 +09 16 59.876522796           K5.5I 5 0
95 ZTF J191621.05+093904.3 AB* 19 16 21.0574789992 +09 39 04.460489496           M7III: 5 0
96 IRAS 19166+1405 AB* 19 18 56.8658146896 +14 11 08.103414192       14.59   M7III: 7 0
97 IRAS 19194+1331 AB* 19 21 44.5742934384 +13 37 22.474806960           M1.5 5 0
98 IRAS 19269+1739 AB* 19 29 11.6641429320 +17 46 03.841070016       15.57   M7III: 8 0
99 IRAS 19298+1755 AB* 19 32 03.8201120352 +18 01 43.426735392           M1 5 0
100 IRAS 19397+2234 s*r 19 41 53.1908071344 +22 41 36.770623548           M0.5I 5 0
101 NAME Galactic Bar reg ~ ~           ~ 1458 0

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