2008AJ....135.1117M


Query : 2008AJ....135.1117M

2008AJ....135.1117M - Astron. J., 135, 1117-1135 (2008/April-0)

Mass outflow and chromospheric activity of red giant stars in globular clusters. I. M15.

MESZAROS Sz., DUPREE A.K. and SZENTGYORGYI A.

Abstract (from CDS):

High-resolution spectra of 110 selected red giant stars in the globular cluster M15 (NGC 7078) were obtained with Hectochelle at the MMT telescope in 2005 May, 2006 May, and 2006 October. Echelle orders containing Hα and CaII H & K are used to identify emission and line asymmetries characterizing motions in the extended atmospheres. Emission in Hα is detected to a luminosity of log(L/L)=2.36, in this very metal-deficient cluster, comparable to other studies, suggesting that the appearance of emission wings is independent of stellar metallicity. The faintest stars showing Hα emission appear to lie on the asymptotic giant branch (AGB) in M15. A line-bisector technique for Hα reveals outflowing velocities in all stars brighter than log(L/L)=2.5, and this outflow velocity increases with stellar luminosity, indicating the mass outflow increases smoothly with luminosity. Many stars lying low on the AGB show exceptionally high outflow velocities (up to 10-15km.s–1) and more velocity variability (up to 6-8 km.s–1) than red giant branch (RGB) stars of similar apparent magnitude. High velocities in M15 may be related to the low cluster metallicity. Dusty stars identified from Spitzer Space Telescope infrared photometry as AGB stars are confirmed as cluster members by radial velocity measurements, yet their Hα profiles are similar to those of RGB stars without dust. If substantial mass loss creates the circumstellar shell responsible for infrared emission, such mass loss must be episodic.

Abstract Copyright:

Journal keyword(s): globular clusters: general - globular clusters: individual: M15 - stars: AGB and post-AGB - stars: chromospheres - stars: mass loss

VizieR on-line data: <Available at CDS (J/AJ/135/1117): table1.dat table3.dat table5.dat table7.dat>

CDS comments: Object B16 not identified.

Simbad objects: 119

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Number of rows : 119
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3665 0
2 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1299 0
3 * l Car cC* 09 45 14.8112246 -62 30 28.451894   4.33 3.40     G5Iab/b 303 1
4 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3134 0
5 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1729 0
6 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2066 0
7 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1263 0
8 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1860 0
9 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 787 0
10 2MASS J21290843+1209118 RG* 21 29 08.4407878906 +12 09 11.939910535   14.63 13.51     ~ 18 0
11 2MASS J21291235+1210498 RG* 21 29 12.3636561704 +12 10 49.864177618   14.746 13.583     ~ 14 0
12 2MASS J21291305+1211149 RG* 21 29 13.0625508755 +12 11 15.033190169   15.49 14.65     ~ 8 0
13 2MASS J21293076+1206327 RG* 21 29 30.7770447733 +12 06 32.651357513   15.84 15.05     ~ 14 0
14 2MASS J21293312+1212509 RG* 21 29 33.1264140205 +12 12 50.901017344   15.74 15.00     ~ 9 0
15 2MASS J21293353+1204552 RG* 21 29 33.5407678154 +12 04 55.255825157   15.42 14.41     ~ 19 0
16 2MASS J21293462+1203191 RG* 21 29 34.6325444159 +12 03 19.205040881   15.87 15.00     ~ 11 0
17 2MASS J21293507+1206037 RG* 21 29 35.0884756000 +12 06 03.727520764   15.84 15.09     ~ 13 0
18 2MASS J21293586+1208272 RG* 21 29 35.8784386580 +12 08 27.282425775   16.04 15.21     ~ 9 0
19 2MASS J21293799+1211581 RG* 21 29 38.0061299604 +12 11 58.074252487   16.10 15.23     ~ 8 0
20 2MASS J21293871+1211530 RG* 21 29 38.7231099931 +12 11 52.948265046   15.13 14.11     ~ 15 0
21 2MASS J21294003+1216002 RG* 21 29 40.0444755335 +12 16 00.091338793   16.27 15.37     ~ 12 0
22 2MASS J21294125+1207194 RG* 21 29 41.2610930609 +12 07 19.412028344   16.07 15.26     ~ 8 0
23 2MASS J21294295+1209534 RG* 21 29 42.959 +12 09 53.41   16.11 15.25     ~ 26 0
24 2MASS J21294359+1215473 RG* 21 29 43.5967615026 +12 15 47.214427674   15.296 14.290     ~ 28 0
25 2MASS J21294377+1208332 RG* 21 29 43.7814730424 +12 08 33.295999646   15.444 14.441     ~ 21 0
26 2MASS J21294465+1207307 RG* 21 29 44.6489367764 +12 07 30.728753910   14.46 13.52   12.39 ~ 24 0
27 2MASS J21294581+1208455 RG* 21 29 45.8074760365 +12 08 45.462229856   14.87 13.80     ~ 23 0
28 2MASS J21294607+1211315 RG* 21 29 46.0690693881 +12 11 31.488803834   15.433 14.484     ~ 22 0
29 2MASS J21294669+1203206 RG* 21 29 46.6938096218 +12 03 20.684076642   16.14 15.20     ~ 9 0
30 2MASS J21294738+1209046 RG* 21 29 47.3836573836 +12 09 04.606802617   16.26 15.29     ~ 5 0
31 2MASS J21294778+1211307 RG* 21 29 47.7772361930 +12 11 30.697148733   15.96 15.08     ~ 8 0
32 2MASS J21294786+1208453 RG* 21 29 47.8632345772 +12 08 45.304695640   14.99 13.85     ~ 16 0
33 2MASS J21294862+1211457 RG* 21 29 48.6203392689 +12 11 45.734798001   15.23 14.26     ~ 19 0
34 2MASS J21294883+1210252 RG* 21 29 48.8347793429 +12 10 25.196904501   15.99 15.10     ~ 7 0
35 2MASS J21294912+1209037 RG* 21 29 49.129 +12 09 03.72   15.80 15.00     ~ 6 0
36 2MASS J21294944+1208269 RG* 21 29 49.4434120306 +12 08 26.918129304   16.36 15.38     ~ 7 0
37 2MASS J21294979+1211058 RG* 21 29 49.7866140423 +12 11 05.790958963   14.40 13.06     ~ 60 0
38 2MASS J21294979+1212298 RG* 21 29 49.7955460917 +12 12 29.868308060   16.24 15.36     ~ 7 0
39 2MASS J21294992+1218121 RG* 21 29 49.9217738097 +12 18 12.147454721   16.23 15.48     ~ 11 0
40 2MASS J21294993+1208052 RG* 21 29 49.9321909680 +12 08 05.235879828   14.26 13.29   12.13 ~ 36 0
41 2MASS J21295013+1207521 RG* 21 29 50.136 +12 07 52.16   15.54 14.84   13.86 ~ 9 0
42 2MASS J21295016+1206406 RG* 21 29 50.1598454244 +12 06 40.664738123   16.11 15.25     ~ 13 0
43 2MASS J21295028+1209027 RG* 21 29 50.2792810745 +12 09 02.711290040   14.70 13.94   12.98 ~ 17 0
44 2MASS J21295188+1206388 RG* 21 29 51.890 +12 06 38.87   16.06 15.17     ~ 8 0
45 2MASS J21295231+1210515 RG* 21 29 52.3090288987 +12 10 51.457299860   14.59 13.39     ~ 13 0
46 2MASS J21295231+1219397 RG* 21 29 52.3115932356 +12 19 39.693687991   16.35 15.46     ~ 9 0
47 2MASS J21295264+1210440 RG* 21 29 52.6400995936 +12 10 43.968900052   14.52 13.24     ~ 18 0
48 2MASS J21295311+1212310 RG* 21 29 53.11824 +12 12 31.0932   14.887 13.778     ~ 32 0
49 2MASS J21295331+1209340 RG* 21 29 53.3049867775 +12 09 33.981136034   14.79 13.99     ~ 21 0
50 2MASS J21295357+1209106 RG* 21 29 53.5704340915 +12 09 10.604400722   14.67 13.48     ~ 12 0
51 2MASS J21295379+1210203 RG* 21 29 53.7891750554 +12 10 20.308528586   14.34 13.40   12.29 ~ 22 0
52 2MASS J21295473+1208592 RG* 21 29 54.7255010211 +12 08 59.218190305   14.86 13.70     ~ 9 0
53 NGC 7078 341 RG* 21 29 54.9257047366 +12 13 22.480949170   13.72 12.54   11.22 ~ 48 0
54 2MASS J21295505+1202484 RG* 21 29 55.0495079418 +12 02 48.463671440   15.75 14.76     ~ 16 0
55 2MASS J21295529+1209136 RG* 21 29 55.291 +12 09 13.66   14.97 13.96     ~ 5 0
56 2MASS J21295572+1211338 RG* 21 29 55.7238268545 +12 11 33.783786833   14.46 13.25     ~ 13 0
57 2MASS J21295618+1210179 RG* 21 29 56.1791349332 +12 10 17.937979899   13.92 12.72     ~ 17 0
58 2MASS J21295618+1212337 RG* 21 29 56.1807310138 +12 12 33.702674455   13.83 12.73   11.51 ~ 38 0
59 2MASS J21295645+1210294 RG* 21 29 56.452 +12 10 29.42   14.32 13.25     ~ 7 0
60 2MASS J21295666+1209463 RG* 21 29 56.6629649306 +12 09 46.338335177   14.45 12.90     ~ 34 0
61 2MASS J21295672+1213105 RG* 21 29 56.7178551011 +12 13 10.493405524   15.11 14.33   13.36 ~ 21 0
62 2MASS J21295678+1210269 RG* 21 29 56.785 +12 10 26.99   13.99 12.68     ~ 26 0
63 2MASS J21295694+1208446 RG* 21 29 56.9394339279 +12 08 44.645979074   15.25 14.38     ~ 6 0
64 2MASS J21295742+1208215 RG* 21 29 57.4220049549 +12 08 21.462711904   15.27 14.42   13.45 ~ 14 0
65 2MASS J21295802+1211541 RG* 21 29 58.0245393141 +12 11 54.156641667   16.00 15.10     ~ 8 0
66 2MASS J21295815+1209466 RG* 21 29 58.155 +12 09 46.70   14.55 13.24     ~ 6 0
67 2MASS J21295832+1209128 RG* 21 29 58.325 +12 09 12.81   14.46 13.25     ~ 8 0
68 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2978 0
69 2MASS J21295856+1209214 RG* 21 29 58.5642104025 +12 09 21.381623585   14.26 12.83     ~ 27 0
70 2MASS J21295859+1208080 RG* 21 29 58.5935299400 +12 08 07.937750274   15.32 14.48     ~ 14 0
71 2MASS J21295937+1210029 RG* 21 29 59.372 +12 10 02.95   14.54 13.50     ~ 8 0
72 2MASS J21295945+1208355 RG* 21 29 59.4576302235 +12 08 35.419920683   14.79 13.60     ~ 8 0
73 2MASS J21295953+1211525 RG* 21 29 59.5294639969 +12 11 52.534180553   16.06 15.16     ~ 3 0
74 2MASS J21295981+1211107 RG* 21 29 59.8150852074 +12 11 10.667853029   14.84 13.84     ~ 11 0
75 2MASS J21295999+1206265 RG* 21 29 59.9875438949 +12 06 26.520829389   15.82 15.00     ~ 8 0
76 2MASS J21300003+1213395 RG* 21 30 00.0333073784 +12 13 39.490138594   15.24 14.44   13.45 ~ 9 0
77 2MASS J21300033+1210508 RG* 21 30 00.3376742555 +12 10 50.878374513   13.83 12.68   11.52 ~ 25 0
78 2MASS J21300038+1207363 RG* 21 30 00.3784470650 +12 07 36.302131390   14.45 13.33   12.18 ~ 30 0
79 2MASS J21300062+1209284 RG* 21 30 00.625 +12 09 28.44   15.099 14.070     ~ 11 0
80 2MASS J21300090+1208571 RG* 21 30 00.9015187711 +12 08 57.078544345   14.319 12.874     ~ 37 0
81 2MASS J21300165+1212302 RG* 21 30 01.6475211431 +12 12 30.121116971   16.23 15.12     ~ 4 0
82 2MASS J21300224+1211215 RG* 21 30 02.2437732422 +12 11 21.490152135   13.62 12.38   11.05 ~ 49 0
83 2MASS J21300274+1210438 RG* 21 30 02.7380442518 +12 10 43.803365098   14.27 12.88     ~ 28 0
84 2MASS J21300277+1206557 RG* 21 30 02.7739533368 +12 06 55.713984860   15.055 13.997     ~ 21 0
85 2MASS J21300309+1210217 RG* 21 30 03.093 +12 10 21.76   15.72 14.70     ~ 5 0
86 2MASS J21300316+1213286 RG* 21 30 03.1685020112 +12 13 28.693451147   14.61 13.78   12.74 ~ 28 0
87 2MASS J21300349+1203124 RG* 21 30 03.4927666181 +12 03 12.424730394   15.22 14.16     ~ 14 0
88 2MASS J21300400+1208577 RG* 21 30 03.9993025744 +12 08 57.749044448   15.90 14.84     ~ 7 0
89 2MASS J21300409+1207270 RG* 21 30 04.0908397137 +12 07 27.094571970   16.24 15.37     ~ 6 0
90 2MASS J21300431+1210561 RG* 21 30 04.3163230816 +12 10 56.070351270   14.80 13.60     ~ 14 0
91 2MASS J21300462+1208537 RG* 21 30 04.6160034148 +12 08 53.681473884   15.61 14.62     ~ 7 0
92 2MASS J21300465+1207404 RG* 21 30 04.6487743374 +12 07 40.425429365   15.89 15.18     ~ 9 0
93 2MASS J21300474+1211102 RG* 21 30 04.7436389943 +12 11 10.204400711   15.14 14.09     ~ 6 0
94 2MASS J21300517+1213202 RG* 21 30 05.1734277919 +12 13 20.296734988   15.26 14.29     ~ 18 0
95 NGC 7078 954 RR* 21 30 05.5343012922 +12 08 55.290545300   15.32 14.33     ~ 21 0
96 2MASS J21300637+1206592 RG* 21 30 06.3702475113 +12 06 59.208677755   14.61 13.45     ~ 37 0
97 2MASS J21300696+1207465 RG* 21 30 06.9604892477 +12 07 46.456730685   15.09 14.23     ~ 22 0
98 2MASS J21300730+1210506 RG* 21 30 07.3003608032 +12 10 50.635756939   16.02 15.13     ~ 11 0
99 2MASS J21300739+1210330 RG* 21 30 07.39560 +12 10 33.0564   15.059 14.024     ~ 23 0
100 2MASS J21300841+1209421 RG* 21 30 08.4142267588 +12 09 42.106066529   15.88 14.97     ~ 8 0
101 2MASS J21300894+1208490 RG* 21 30 08.9456927598 +12 08 49.008684477   15.666 14.716     ~ 15 0
102 2MASS J21300971+1213424 RG* 21 30 09.7109883960 +12 13 42.377232358   14.74 13.56     ~ 14 0
103 2MASS J21300978+1212544 RG* 21 30 09.78360 +12 12 54.4428   15.17 14.14     ~ 22 0
104 2MASS J21300988+1210524 RG* 21 30 09.8845955534 +12 10 52.425268584   15.41 14.44     ~ 19 0
105 2MASS J21301049+1210061 RG* 21 30 10.4926130257 +12 10 06.165871706   14.60 13.40     ~ 47 0
106 2MASS J21301130+1201484 RG* 21 30 11.3052682971 +12 01 48.413153220   15.53 14.56     ~ 12 0
107 2MASS J21301138+1208412 RG* 21 30 11.3781787304 +12 08 41.176209321   15.19 14.20     ~ 15 0
108 2MASS J21301169+1210337 RG* 21 30 11.6927681002 +12 10 33.655548895   15.71 14.79     ~ 16 0
109 2MASS J21301426+1209234 RG* 21 30 14.2622709461 +12 09 23.444638259   15.42 14.60     ~ 17 0
110 2MASS J21301494+1210207 RG* 21 30 14.9484982012 +12 10 20.739545974   15.19 14.18     ~ 20 0
111 2MASS J21301522+1211345 RG* 21 30 15.2301152315 +12 11 34.555092133   16.22 15.26     ~ 8 0
112 2MASS J21301565+1208229 RG* 21 30 15.6564658897 +12 08 22.999372956   15.126 14.089     ~ 32 0
113 2MASS J21301577+1216595 RG* 21 30 15.7811242542 +12 16 59.630189641   16.19 15.43     ~ 9 0
114 2MASS J21301606+1213342 RG* 21 30 16.0618851430 +12 13 34.308039071   15.39 14.42     ~ 19 0
115 2MASS J21302103+1213007 RG* 21 30 21.0362069941 +12 13 00.808800082   16.21 15.41     ~ 8 0
116 2MASS J21302271+1217595 RG* 21 30 22.7136498811 +12 17 59.629537068   15.54 14.71     ~ 12 0
117 2MASS J21303177+1208547 RG* 21 30 31.7757484400 +12 08 54.809984130   15.70 14.87     ~ 18 0
118 2MASS J21304412+1211226 RG* 21 30 44.1330339267 +12 11 22.593462457   14.80 13.69     ~ 18 0
119 2MASS J21304927+1207312 RG* 21 30 49.2863367831 +12 07 31.284547682   15.77 15.14     ~ 11 0

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2021.10.21-01:18:43

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