2004AJ....128.2474M

Query : 2004AJ....128.2474M

2004AJ....128.2474M - Astron. J., 128, 2474-2500 (2004/November-0)

The origins and evolutionary status of B stars found far from the galactic plane. I. Composition and spectral features.

MARTIN J.C.

Abstract (from CDS):

The existence of faint blue stars far above the Galactic plane that have spectra that are similar to nearby Population I B stars presents several interesting questions. Among them are the following: Can a Population I B star travel from the disk to a position many kiloparsecs above the plane in a relatively short main-sequence lifetime? Is it possible that single massive star formation is occurring far from the Galactic plane? Are these objects something else masquerading as main-sequence B stars? This paper (the first of two) analyzes the abundances of a sample of these stars and reveals several that are chemically similar to nearby Population I B stars, whereas others clearly have abundance patterns more like those expected in blue horizontal-branch (BHB) or post-asymptotic giant branch stars. Several of those with old evolved star abundances also have interesting features of note in their spectra. We also consider why this sample does not have any classical Be stars and identify at least two nearby solar-metallicity BHB stars.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Structure - Stars: Abundances - Stars: AGB and Post-AGB - Stars: Early-Type - Stars: Emission-Line, Be - Stars: Horizontal-Branch

Simbad objects: 72

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Number of rows : 72
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 * gam Peg bC* 00 13 14.1523490172 +15 11 00.954346538 1.75 2.61 2.84 2.94 3.13 B2IV 720 0
2 HD 1084 PM* 00 15 09.8688398064 +17 41 30.056015688   9.45 8.99     F8 12 0
3 HD 1112 * 00 15 27.2847614880 -03 39 15.097931676   9.05 9.11     B9V 32 0
4 HIP 1511 * 00 18 49.7908688760 +30 23 33.449073648   11.72 11.39     ~ 15 0
5 BD-15 115 * 00 38 20.2595898264 -14 59 54.165165180 9.848 10.686 10.885 10.980 11.089 B2 66 0
6 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
7 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
8 HD 8323 * 01 22 24.8825924616 -07 17 12.975052092   9.45 9.61     B8IV 36 0
9 BD-07 230 * 01 26 38.4450766152 -06 20 18.671848080   11.2 11.0     ~ 23 0
10 Feige 23 * 02 32 17.1742214952 +02 59 52.633663188   11.74 11.56     B6V 29 0
11 HD 15910 * 02 32 54.4837188408 -20 20 12.010328088   10.06 10.16     B9IV/V 23 0
12 Feige 25 * 02 38 37.7859286344 +05 28 11.304856488   12.50 13.55     B7 57 0
13 HD 18100 bC? 02 53 40.8050199600 -26 09 20.428125408   8.23 8.44     B5II/III 104 0
14 HD 21305 * 03 25 35.9322956424 -20 20 03.547222656   10.14 10.33     B3/5III 26 0
15 HD 21532 * 03 27 46.3619744808 -21 23 50.689903524   9.75 9.84     B7V 31 0
16 * eps Per bC* 03 57 51.2393818140 +40 00 36.719213615 1.71 2.71 2.89 2.96 3.14 B0.5III 533 0
17 HD 28114 bC* 04 26 21.1022491080 +08 35 24.952062192 5.65 6.046 6.055     B6IV 84 1
18 * bet Ori s*b 05 14 32.27210 -08 12 05.8981 -0.56 0.10 0.13 0.13 0.15 B8Ia 786 0
19 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
20 * gam Ori V* 05 25 07.86325 +06 20 58.9318 0.54 1.42 1.64 1.73 1.95 B2III 542 1
21 * 134 Tau * 05 49 32.9303335271 +12 39 04.760685507 4.68 4.811 4.875     B9V 208 0
22 HD 40276 * 05 53 24.3001465128 -62 48 18.804157956   10.10 9.98 9.92 9.962 A3IV 18 0
23 HD 40267 * 05 56 47.0276462712 -22 17 54.991972968   9.62 9.81     B3II/III 15 0
24 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 800 0
25 HD 60778 HB* 07 36 11.7736405176 -00 08 15.571268556 9.34 9.20 9.10     A0III/IV 117 0
26 V* PT Pup bC* 07 36 41.0352383592 -19 42 08.425020168 4.65 5.524 5.699     B2III 155 0
27 BD+61 996 * 07 46 02.5443894624 +61 21 47.060562780   9.80 9.91     B2 15 0
28 Ton 927 HS* 08 33 20.3353408224 +20 24 24.725941524   11.237 11.353 11.640   sdB/sdO 28 0
29 HD 74721 HB* 08 45 59.2614567408 +13 15 48.591616392 8.88 8.75 8.72     A0V 166 0
30 HD 233622 V* 09 21 33.6007333536 +50 05 56.365066896   9.76 9.91     B2-4 54 0
31 HD 237844 Em* 09 51 57.9753671424 +55 43 32.399570532   9.94 10.12     B2III 23 0
32 V* ER Leo dS* 10 21 47.0681038800 +15 32 03.587322840   9.80 9.87     ~ 28 0
33 * 39 UMa PM* 10 43 43.3264670520 +57 11 57.118841016   5.744 5.782     A0III 68 0
34 BD+38 2182 * 10 49 12.9127247352 +38 00 14.849836668   10.95 11.2     B3V 58 0
35 Feige 40 * 11 21 29.3461640136 +11 19 17.027257728   11.1 11.1     B4V 39 0
36 HD 100340 HS? 11 32 49.9414410936 +05 16 36.231905676 8.906 9.881 10.115 10.219 10.353 B0 105 0
37 HD 103376 * 11 54 17.1795190488 +18 37 22.746335052   10.03 10.17     B8Vk 44 0
38 HD 105183 HS* 12 06 47.2348389600 +11 40 12.659833056   10.93 11.06     sdB8IIIHe2 132 0
39 HD 105262 pA* 12 07 10.8254657184 +12 59 07.679272308 6.96 7.08 7.08     B9 75 0
40 HD 106929 * 12 17 49.9634494392 +10 07 11.965090152   9.64 9.79     B9 35 0
41 BD+49 2137 * 12 25 00.3907055280 +49 08 30.658247052   10.49 10.63     B7V 36 0
42 BD+36 2268 V* 12 25 23.4491331360 +35 58 33.472196148   10.20 10.31     B3Vn 58 0
43 HD 110166 * 12 39 56.9868304272 +36 59 53.607675624   8.64 8.74     B7V 49 0
44 BD+30 2355 * 13 01 52.9622439552 +29 34 57.158060088   10.55 10.65     A0V 48 0
45 PB 166 HS* 13 24 00.7250833176 +49 22 32.314906740   12.29 12.48     sdB 41 0
46 Feige 84 HS* 13 35 11.9823807408 +13 27 44.096137488   11.5 11.4     sdB3 45 0
47 HD 119608 * 13 44 31.3089560400 -17 56 13.217749476 6.65 7.47 7.53 7.51 7.51 B1Ib 127 0
48 HD 121968 * 13 58 51.1663111056 -02 54 52.325640252 9.160 10.071 10.256 10.330 10.429 B2II 112 0
49 HD 123884 s*b 14 10 33.7821642384 -17 59 27.301869456 9.02 9.35 9.32     B8/9Ia/abp 53 0
50 HD 125924 * 14 22 42.9946000008 -08 14 53.580901704 8.64 9.48 9.66     B2IV 96 0
51 BD+20 3004 V* 14 39 31.2483522456 +19 25 43.517114184   9.98 10.04     B5V 37 0
52 HD 137569 pA* 15 26 20.8172517192 +14 41 36.321520992   7.86 7.91     B9Iab:p 111 0
53 V* IT Lib EB* 15 33 18.9137957616 -25 01 37.011331272 8.34 9.04 9.09     B2/3(IV)(n) 40 0
54 HD 140543 bC* 15 44 56.6613740256 -21 48 53.910922644 7.97 8.86 8.88     B1Iab/b(n) 58 0
55 BD+33 2642 pA* 15 51 59.8854348048 +32 56 54.329485272 9.806 10.61 10.73 10.884 10.961 O7p 456 0
56 HD 146813 Pu* 16 15 14.8024445208 +55 47 58.353874620   8.86 9.06     B1.5 51 0
57 HD 149363 * 16 34 28.2788187456 -06 08 10.281661044 7.06 7.86 7.81     B1/2Ib 95 0
58 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0V 959 0
59 V* V652 Her pA* 16 48 04.6934854032 +13 15 42.420402252   10.31 10.51     ~ 147 0
60 HD 183899 * 19 32 45.1795643616 -26 09 46.633467528 8.93 9.75 9.93     B1/2II 36 0
61 HD 188618 * 19 56 40.4812487520 -17 55 17.060259252   9.48 9.38     B2II 32 0
62 * nu. Cap * 20 20 39.8157949497 -12 45 32.690284207 4.61 4.72 4.76 4.75 4.81 B9IV 279 0
63 HIP 104931 * 21 15 18.4730663808 +03 25 09.489842004   10.90 10.45     B5 11 0
64 HD 206144 Pu* 21 40 33.3796014624 -17 36 00.560827224 8.36 9.22 9.34     B2II(n) 66 0
65 * 21 Peg * 22 03 19.0326115488 +11 23 11.574375540   5.762 5.822     B9.5V 160 0
66 HD 209684 * 22 05 31.1550386448 -13 46 12.835716744 8.83 9.657 9.803     B2/3III 42 0
67 HD 213781 HB* 22 34 04.5839974008 -12 09 29.608937280 8.48 8.93 9.00 9.71 9.22 B8/9III 46 0
68 HD 216135 HS* 22 50 28.2300262944 -13 18 44.343755820 9.374 9.992 10.111 10.163 10.230 sdB5 48 0
69 HD 217811 V* 23 02 45.1478611209 +44 03 31.498436363 5.8 6.38 6.42     B2V 85 1
70 HD 218970 PM* 23 12 30.6294754224 -21 06 43.453464732   9.57 9.81     A0p 44 0
71 HD 220787 * 23 26 45.4929041352 -11 01 57.358135488 7.44 8.14 8.29     B3III 80 0
72 HD 222040 * 23 37 17.6935733424 -20 55 55.148361852   11.1 11.5     B9IV 15 0

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