2014ApJ...790L...5B

Query : 2014ApJ...790L...5B

2014ApJ...790L...5B - Astrophys. J., 790, L5 (2014/July-3)

The most distant stars in the Milky Way.

BOCHANSKI J.J., WILLMAN B., CALDWELL N., SANDERSON R., WEST A.A., STRADER J. and BROWN W.

Abstract (from CDS):

We report on the discovery of the most distant Milky Way (MW) stars known to date: ULAS J001535.72+015549.6 and ULAS J074417.48+253233.0. These stars were selected as M giant candidates based on their infrared and optical colors and lack of proper motions. We spectroscopically confirmed them as outer halo giants using the MMT/Red Channel spectrograph. Both stars have large estimated distances, with ULAS J001535.72+015549.6 at 274±74 kpc and ULAS J074417.48+253233.0 at 238±64 kpc, making them the first MW stars discovered beyond 200 kpc. ULAS J001535.72+015549.6 and ULAS J074417.48+253233.0 are both moving away from the Galactic center at 52±10 km/s and 24±10 km/s, respectively. Using their distances and kinematics, we considered possible origins such as: tidal stripping from a dwarf galaxy, ejection from the MW's disk, or membership in an undetected dwarf galaxy. These M giants, along with two inner halo giants that were also confirmed during this campaign, are the first to map largely unexplored regions of our Galaxy's outer halo.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: halo - Galaxy: stellar content - Galaxy: structure - stars: late-type

Simbad objects: 50

goto Full paper

goto View the references in ADS

Number of rows : 50
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 ULAS J001535.72+015549.6 NIR 00 15 35.72 +01 55 49.6           M 3 0
2 [DBE2012b] 88-TARG34 HB* 00 17 55.7 +00 03 47           B 2 0
3 HD 1326 PM* 00 18 22.8849799680 +44 01 22.637951588   9.61 8.14 7.3   M2V 602 0
4 HD 1326B PM* 00 18 25.8251408611 +44 01 38.092431857   12.84 11.04 10.3   M3.5V 317 0
5 HD 4647 Pu* 00 49 13.8732885024 +57 04 30.086290596   8.822 7.119     M2III 23 0
6 V* WW Psc LP* 00 59 49.6871167920 +06 28 59.614071060 9.800 7.810 6.140     M2.5III 73 0
7 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
8 V* V360 And LP* 01 04 04.4985547416 +38 41 18.738228768 10.630 8.770 7.080     M3III 33 0
9 [DBE2012b] 88-TARG8 HB* 01 29 52.7 +03 12 43           B 2 0
10 HD 236791 * 01 34 52.5075917064 +59 25 01.747090560   10.9 8.91     M3III 9 0
11 Ross 15 PM* 01 59 23.5137039235 +58 31 16.104337813   12.90 12.155 11.871   M4Ve 102 0
12 G 173-39 PM* 02 08 53.6246553758 +49 26 56.437533465   14.02 12.45 12.12   M4.0Ve 88 0
13 SDSS J021121.56-003808.3 LM* 02 11 21.5626814712 -00 38 08.369020860           M1 4 0
14 HD 15285 SB* 02 27 45.86150 +04 25 55.7489 11.398 10.101 8.673 7.797 6.972 M2V 144 0
15 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
16 BD+18 372 * 02 54 38.1053256072 +19 20 38.476381632   11.94 9.91     M3III 6 0
17 * rho02 Ari LP* 02 55 48.4979998 +18 19 53.902936 8.56 7.44 5.93 3.51 1.34 M6-III: 232 0
18 HD 17993 S*? 02 56 29.7429680472 +62 36 34.565705820   8.83 7.05     S: 17 0
19 V* EH Cet LP* 02 57 04.5733907904 +04 30 03.690991836   7.83 6.21     M2III 36 0
20 V* SS Cep AB* 03 49 30.0153276840 +80 19 20.902460520   8.37 7.16     M5III 61 0
21 HD 24410 LP? 03 55 57.6275062224 +57 40 24.808374804   10.23 8.69     M8III 12 0
22 HD 286798 ** 04 26 42.82285 +12 41 11.6835   11.848 10.501 9.98   K2 71 0
23 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
24 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
25 CRTS J073223.5+263420 EB* 07 32 23.5531922592 +26 34 19.826274540     18.10     M 6 0
26 CRTS J074150.4+263355 EB* 07 41 50.4015937008 +26 33 55.539832644     15.94     M 3 0
27 [DCD2013] MLS J074237.7+225819 RR* 07 42 37.7755593768 +22 58 19.439786424     21.11     ~ 2 0
28 ULAS J074417.48+253233.0 NIR 07 44 17.48 +25 32 33.0           M 2 0
29 V* YZ CMi PM* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 957 0
30 ULAS J075202.79+204645.0 NIR 07 52 02.79 +20 46 45.0           ~ 1 0
31 CRTS J075525.0+235952 RS* 07 55 25.0966241339 +23 59 52.184174231           M 6 0
32 2MASS J07555427+2731308 AB? 07 55 54.2700623200 +27 31 30.831489649           M0.0III 4 0
33 2MASS J09054635+2024381 C* 09 05 46.3602502896 +20 24 38.134249164           C 6 0
34 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
35 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
36 [MAG2004] 90 C* 13 01 18.4755958008 +00 29 50.655679512           Ce 5 0
37 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
38 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
39 [MAG2004] 95 C* 17 25 54.3934184160 +03 00 26.581718808           C 4 0
40 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
41 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
42 ULAS J205800.46-003445.3 NIR 20 58 00.46 -00 34 45.3           M 1 0
43 ULAS J211225.54-005329.4 NIR 21 12 25.54 -00 53 29.4           M 1 0
44 ULAS J223815.77+042531.9 NIR 22 38 15.77 +04 25 31.9           M 1 0
45 [MAG2004] 54 C* 22 46 28.5016216416 -27 26 58.230493728   19.4 18.2     C 6 0
46 ULAS J225509.66+114543.6 NIR 22 55 09.66 +11 45 43.6           M 1 0
47 ULAS J225630.15+065544.8 NIR 22 56 30.15 +06 55 44.8           M 1 0
48 ULAS J231331.68+065303.0 NIR 23 13 31.68 +06 53 03.0           M 1 0
49 NAME Pisces Overdensity G 23 19.0 +00 00           ~ 65 0
50 ULAS J235247.04+023151.5 NIR 23 52 47.04 +02 31 51.5           M 1 0

To bookmark this query, right click on this link: simbad:objects in 2014ApJ...790L...5B and select 'bookmark this link' or equivalent in the popup menu