2006ApJ...651..502P


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.30CET20:55:07

2006ApJ...651..502P - Astrophys. J., 651, 502-516 (2006/November-1)

Spitzer IRAC photometry of M, L, and T dwarfs.

PATTEN B.M., STAUFFER J.R., BURROWS A., MARENGO M., HORA J.L., LUHMAN K.L., SONNETT S.M., HENRY T.J., RAGHAVAN D., MEGEATH S.T., LIEBERT J. and FAZIO G.G.

Abstract (from CDS):

We present the results of a program to acquire photometry for 86 late M, L, and T dwarfs using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We examine the behavior of these cool dwarfs in various color-color and color-magnitude diagrams composed of near-IR and IRAC data. The T dwarfs exhibit the most distinctive positions in these diagrams. In M5.8versus [5.8]-[8.0], the IRAC data for T dwarfs are not monotonic in either magnitude or color, giving the clearest indication yet that the T dwarfs are not a one-parameter family in Teff. Because metallicity does not vary enough in the solar neighborhood to act as the second parameter, the most likely candidate then is gravity, which in turn translates to mass. Among objects with similar spectral type, the range of mass suggested by our sample is about a factor of 5 (∼70MJto ∼15MJ), with the less massive objects making up the younger members of the sample. We also find the IRAC 4.5 µm fluxes to be lower than expected, from which we infer a stronger CO fundamental band at ∼4.67 µm. This suggests that equilibrium CH4/CO chemistry underestimates the abundance of CO in T dwarf atmospheres, confirming earlier results based on M-band observations from the ground. In combining IRAC photometry with near-IR JHK photometry and parallax data, we find the combination of Ks, IRAC 3.6 µm, and 4.5 µm bands to provide the best color-color discrimination for a wide range of M, L, and T dwarfs. Also noteworthy is the MKsversus Ks-[4.5] relation, which shows a smooth progression over spectral type, and splits the M, L, and T types cleanly.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Fundamental Parameters - Stars: Late-Type - Stars: Low-Mass, Brown Dwarfs

VizieR on-line data: <Available at CDS (J/ApJ/651/502): table1.dat table3.dat refs.dat>

Simbad objects: 87

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Number of rows : 87

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 L 362-29 B BD* 00 04 34.8641153471 -40 44 06.464450691       19.61 16.88 L5+L5 95 0
2 L 362-29 PM* 00 04 36.4374506293 -40 44 02.887752646   14.47 12.84 12.525   M4V 68 0
3 G 158-27 PM* 00 06 43.1972293497 -07 32 17.024270968     13.837 13.605 10.15 M5.5V 173 0
4 Koenigstuhl 1B BD* 00 21 05.9169357533 -42 44 43.496695735       19.46 16.79 L0.6:V 25 0
5 V* DY Psc BY* 00 24 24.6343271916 -01 58 19.968960103     19.42 17.301 15.022 M9.5V 190 1
6 LSPM J0036+1821 BD* 00 36 16.1119130763 +18 21 10.291990145       18.451 16.053 L3.5 188 0
7 LP 938-71 LM* 01 02 51.0509339431 -37 37 43.771646556     18.575 16.223 13.83 M8.0V 29 0
8 2MASS J01410321+1804502 BD* 01 41 03.2527334505 +18 04 50.175169150           L0.8V 24 0
9 BRLT 38 BD* 01 51 41.55936 +12 44 30.0768           T0.5 62 0
10 2MASS J02074284+0000564 BD* 02 07 42.84984 +00 00 56.4408           T4.5 35 0
11 2MASSI J0243137-245329 BD* 02 43 13.71792 -24 53 29.8356           T6.0 43 0
12 NAME Teegarden's Star LM* 02 53 00.8913291021 +16 52 52.642086267   17.21   14.1   dM6 111 0
13 DENIS J025503.3-470049 BD* 02 55 03.6945042584 -47 00 51.345365454     22.921 19.906 17.454 L9 125 0
14 2MASS J03202839-0446358 LM* 03 20 28.3595736791 -04 46 36.418652525           M8.5+T5 39 0
15 LP 944-20 LM* 03 39 35.2525168530 -35 25 43.628465433     18.69 16.39 13.288 M9.5Ve 266 0
16 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 149 0
17 2MASSI J0423485-041403 BD* 04 23 48.5838371891 -04 14 03.228116841           L6.5+T2 107 0
18 2MASS J04510093-3402150 BD* 04 51 00.9456659247 -34 02 14.915220179           L0.5 14 0
19 2MASS J05325346+8246465 BD* 05 32 54.4385958315 +82 46 45.174215154           esdL7 55 0
20 2MASS J05395200-0059019 BD* 05 39 52.0036661257 -00 59 01.474175739           L5V 74 0
21 2MASS J05591914-1404488 BD* 05 59 19.1884616785 -14 04 49.215388622           T4.5 134 0
22 2MASS J06523073+4710348 BD* 06 52 30.7199995218 +47 10 34.933788604           L3.5+L6.5 32 0
23 G 109-35 PM* 06 59 28.8165989766 +19 20 55.857980235   16.78   10.6   M5.0Ve 62 0
24 2MASS J07171626+5705430 BD* 07 17 16.2660476345 +57 05 43.154446841           L3 15 0
25 2MASSI J0727182+171001 BD* 07 27 18.24600 +17 10 01.2072           T7.0 75 0
26 LSPM J0746+2000 BD* 07 46 42.49536 +20 00 32.6124       17.9 15.034 L0+L1.5 172 1
27 2MASSI J0755480+221218 BD* 07 55 47.95488 +22 12 16.9416           T5.2 25 0
28 2MASSI J0825196+211552 BD* 08 25 19.6171008398 +21 15 51.565129705       21.97 19.22 L7.5V 104 0
29 G 51-15 Er* 08 29 49.3528237575 +26 46 33.626773321   16.87   14.736   M6.5Ve 255 0
30 LP 485-17 LM* 08 30 32.5702625783 +09 47 15.435406127   20.2 19.063 17.160 14.774 M7.5Ve 27 0
31 2MASS J08354256-0819237 BD* 08 35 42.5323299335 -08 19 23.389468248           L6.5 56 0
32 SDSS J083717.21-000018.0 BD* 08 37 17.20032 -00 00 19.3608           T1 42 0
33 LP 666-9 LM* 08 53 36.1607609203 -03 29 32.201339067     18.959 16.781 14.487 M9Ve 226 0
34 2MASS J08575849+5708514 BD* 08 57 58.4811860075 +57 08 51.479710579           L7V 36 0
35 2MASS J09083803+5032088 BD* 09 08 38.0116465550 +50 32 08.217819968           L8 34 0
36 * pi.01 Cnc C BD* 09 12 14.69112 +14 59 39.6240           L8.5+L7.5 51 1
37 2MASS J09261537+5847212 BD* 09 26 15.37752 +58 47 21.2280           T3.5+T5 29 0
38 2MASSI J0937347+293142 BD* 09 37 34.87968 +29 31 40.9908           T6 80 0
39 2MASS J10170754+1308398 BD* 10 17 07.5511495626 +13 08 39.830791045         17.418 L1.5+L3 27 0
40 2MASS J10210969-0304197 BD* 10 21 09.69240 -03 04 19.7904           T1+T4 67 0
41 L 143-23 PM* 10 44 21.2334129761 -61 12 35.263329881   15.74 13.920 12.33 10.31 M5.5V 53 0
42 2MASSW J1047539+212423 BD* 10 47 53.85456 +21 24 23.4684           T6.5 72 0
43 LP 731-58 Er* 10 48 12.6142482968 -11 20 09.609457904     15.784 16.01 11.25 M6.5V 144 0
44 DENIS J1058.7-1548 BD* 10 58 47.8360754207 -15 48 17.254347029       20.095 17.764 L3V 86 2
45 BD+44 2051B Er* 11 05 30.8856443432 +43 31 17.884318012   16.45 14.45 13.4   M6.0V 210 0
46 2MASS J11101001+0116130 BD* 11 10 10.01064 +01 16 13.0872           T5.5 64 0
47 2MASS J11553952-3727350 BD* 11 55 39.5360387792 -37 27 35.506067298           L2e 34 0
48 2MASS J12043036+3212595 BD* 12 04 30.3586594618 +32 12 59.518262384           L0e 15 0
49 2MASS J12171110-0311131 BD* 12 17 11.10288 -03 11 13.1748           T7.5 76 0
50 V* GL Vir Er* 12 18 59.3999178645 +11 07 33.770248089   15.68 13.90 13.55   M4.5Ve 140 0
51 2MASS J12255432-2739466 BD* 12 25 54.32328 -27 39 46.6776           T5.5+T8 53 0
52 2MASS J12373919+6526148 BD* 12 37 39.19632 +65 26 14.8092           T6.5 63 0
53 2MASS J12545393-0122474 BD* 12 54 53.9040607346 -01 22 47.399401142           T2e: 134 0
54 2MASSI J1300425+191235 BD* 13 00 42.5078338130 +19 12 34.600170519         15.9 L1.7V 46 0
55 NAME Kelu-1 BD* 13 05 40.1737206066 -25 41 05.830344467         16.85 L2+L3.5 238 0
56 2MASS J13314894-0116500 BD* 13 31 48.94632 -01 16 50.0592           L6V 27 0
57 [VV2006] J134547.8-003213 QSO 13 45 47.7584847472 -00 32 12.659298105   20.51 20.34     ~ 8 0
58 2MASS J13464634-0031501 BD* 13 46 46.34496 -00 31 50.1312           T6 69 0
59 LP 271-25 LM* 14 28 43.2272685950 +33 10 39.245755294   21.2   17.8   M9Ve 233 0
60 2MASS J14392836+1929149 BD* 14 39 28.36896 +19 29 14.9820           L1V 117 0
61 LP 914-54 Er* 14 56 38.2643948965 -28 09 48.622430247     17.141 14.863 12.433 M7.0Ve 137 0
62 GJ 570 D BD* 14 57 14.96256 -21 21 47.7504           T8 196 1
63 2MASSW J1506544+132106 BD* 15 06 54.3298685056 +13 21 06.041740524           L3 84 0
64 2MASSW J1507476-162738 BD* 15 07 47.6756748763 -16 27 40.118410414     22.136 18.928 16.579 L5V 172 0
65 2MASSW J1515008+484742 BD* 15 15 00.83424 +48 47 41.6904           L6.5 50 0
66 2MASSI J1526140+204341 BD* 15 26 14.0089148423 +20 43 40.439335740           L5 27 0
67 2MASSI J1534498-295227 BD* 15 34 49.84080 -29 52 27.4188           T4.5+T5 59 0
68 2MASS J15394189-0520428 BD* 15 39 41.9237672095 -05 20 42.764562369         17.47 L4.2V 31 0
69 2MASSI J1546271-332511 BD* 15 46 27.18600 -33 25 11.1828           T5.7 28 1
70 2MASS J15530228+1532369 BD* 15 53 02.28072 +15 32 36.9132           T6.5+T7.5 40 0
71 2MASS J15551573-0956055 BD* 15 55 15.7768703009 -09 56 06.044492616           L1.6V 26 0
72 2MASS J16241436+0029158 BD* 16 24 14.36712 +00 29 15.8172           T6V 131 0
73 2MASS J16322911+1904407 BD* 16 32 29.11416 +19 04 40.7136       22.42 19.98 L8V 119 0
74 2MASS J16452211-1319516 BD* 16 45 22.0919780729 -13 19 52.262593548           L1.5 32 0
75 VB 8 Er* 16 55 35.2561420232 -08 23 40.752903617   18.7 16.916 14.566 12.24 M7Ve 387 0
76 2MASSI J1721039+334415 BD* 17 21 03.6332020321 +33 44 16.923120330           L5.3:V 30 0
77 2MASSW J1728114+394859 BD* 17 28 11.50056 +39 48 59.3100           L5+L6.5 52 0
78 2MASS J17503293+1759042 BD* 17 50 32.93832 +17 59 04.2504           T3.5 46 0
79 2MASSI J1835379+325954 PM* 18 35 37.8803560459 +32 59 53.311357837   20.0   17.1   M8.5V 104 0
80 VB 10 Er* 19 16 57.6103282334 +05 09 01.588675251     17.30     M8V 438 1
81 2MASS J20282035+0052265 BD* 20 28 20.3586416021 +00 52 26.511094674           L2.5 29 0
82 2MASS J21041491-1037369 BD* 21 04 14.9650744184 -10 37 37.345297509           L2 43 0
83 * eps Ind B BD* 22 04 10.52064 -56 46 57.7452     24.12 20.8 15.60 T1V+T6V 134 2
84 2MASSW J2224438-015852 BD* 22 24 43.8550503291 -01 58 53.265872547           L4.5V 107 0
85 2MASSI J2254188+312349 BD* 22 54 18.92016 +31 23 49.8300           T5.0 58 0
86 2MASSI J2339101+135230 BD* 23 39 10.25160 +13 52 28.4772           T5.4 23 0
87 2MASSI J2356547-155310 BD* 23 56 54.77040 -15 53 11.1336           T5.8 39 0

    Equat.    Gal    SGal    Ecl

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2020.11.30-20:55:07

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