2008ApJ...687.1107F


Query : 2008ApJ...687.1107F

2008ApJ...687.1107F - Astrophys. J., 687, 1107-1116 (2008/November-2)

New M dwarf debris disk candidates in NGC 2547.

FORBRICH J., LADA C.J., MUENCH A.A. and TEIXEIRA P.S.

Abstract (from CDS):

With only six known examples, M dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shallow mid-infrared observation of NGC 2547, we present a considerably deeper Spitzer MIPS image of the region, with a maximum exposure time of 15 minutes/pixel. Among sources selected from a previously published membership list, we identify nine new M dwarfs with excess emission at 24 µm tracing warm material close to the snow line of these stars, at orbital radii of less than 1 AU. We argue that these are likely debris disks, suggesting that planet formation is under way in these systems. Interestingly, the estimated excess fraction of M stars appears to be higher than that of G and K stars in our sample.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - Infrared: Stars - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 2547 - Stars: Planetary Systems: Formation

Nomenclature: Table 2: [FLM2008] NN (Nos 1-26).

Simbad objects: 41

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Number of rows : 41
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Horologium Association As* 02 10.0 -54 30           ~ 53 0
2 NGC 869 OpC 02 18 58 +57 08.0           ~ 457 0
3 NGC 884 OpC 02 22 20 +57 08.9           ~ 469 0
4 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3234 0
5 StKM 1-497 TT* 04 37 37.4553491592 -02 29 28.950973764   12.04 10.59   8.59 M1.1V 119 0
6 V* V1005 Ori BY* 04 59 34.8342878424 +01 47 00.669818328   11.48 10.107 9.603 8.239 M0Ve 324 0
7 CD-49 3371 * 08 08 45.7097505552 -49 23 47.410193724   10.78 10.64 10.67 10.29 ~ 22 0
8 Cl* NGC 2547 OJD 82 * 08 08 54.0760964160 -49 21 04.654360044       19.28   ~ 4 0
9 2MASS J08085649-4923128 * 08 08 56.4938565192 -49 23 12.805463868           ~ 3 0
10 2MASS J08090250-4858172 Y*O 08 09 02.5063872816 -48 58 17.289559668     13.13 12.73 12.32 G6-G7 31 0
11 Cl* NGC 2547 JO 1 LM* 08 09 17.7195750096 -49 08 34.543453452     19.57   16.41 M4.5 12 0
12 2MASS J08092450-4928575 LM* 08 09 24.5078296056 -49 28 57.556763148     17.48   14.98 ~ 8 0
13 CPD-48 1496 * 08 09 26.6857435584 -49 14 37.169068704   11.26 10.94     ~ 21 0
14 Cl* NGC 2547 OJD 50 * 08 09 35.4834335520 -49 13 03.335454768   18.493 18.006 18.48 16.74 M4.5 11 0
15 CD-48 3530 ** 08 09 38.185200 -49 18 40.35924   10.69 10.39 10.45 10.495 A9V 12 0
16 DENIS J080945.1-484652 * 08 09 45.0993636456 -48 46 52.070587536         15.20 ~ 5 0
17 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 366 0
18 Cl* NGC 2547 JND 13-271 * 08 09 53.3016823776 -49 18 13.250620980   18.713 17.229 16.201 14.953 M2 11 0
19 Cl* NGC 2547 NTJ 8-1868 LM* 08 09 56.4410630112 -49 22 10.939502676   17.299 15.915 15.093 14.187 M0 17 0
20 HD 68396 * 08 09 57.5328590400 -49 08 20.222536092   8.85 8.86 8.94   A0Vn 27 0
21 CD-48 3547 CV* 08 10 06.0739176720 -49 14 18.083781384   9.97 9.88 9.83   A1V 23 0
22 HD 68420 * 08 10 08.4167952600 -49 00 43.434903816   9.93 9.84 9.94   A3V 23 0
23 Cl* NGC 2547 NTJ 8-2512 LM* 08 10 13.7471622600 -49 17 11.300091684   19.258 17.757 16.754 15.281 ~ 15 0
24 Cl* NGC 2547 OJD 67 * 08 10 13.9017802104 -49 39 48.108113388       19.12   ~ 3 0
25 2MASS J08101546-4905487 Y*O 08 10 15.4544865840 -49 05 48.737577876   13.211 12.539   11.692 ~ 13 0
26 HD 68451 * 08 10 16.0818194232 -49 02 05.711778132 6.56 7.19 7.32 7.36   B5II 43 0
27 UCAC2 10803089 * 08 10 16.9084373856 -48 56 29.196256092         13.08 ~ 8 0
28 2MASS J08101799-4923502 Y*O 08 10 17.9925966720 -49 23 50.339364828   14.785 13.899 13.396 12.898 ~ 16 0
29 HD 68478 * 08 10 20.5684356576 -49 14 14.494042104 5.65 6.300 6.447     B3III/IV 48 0
30 HD 68496 * 08 10 27.2436784248 -49 09 50.928876288   7.81 7.88 7.92   B5/7V 39 0
31 2MASS J08102955-4922094 * 08 10 29.5409447376 -49 22 09.552806652           ~ 2 0
32 2MASS J08104437-4939001 Y*O 08 10 44.3773772208 -49 39 00.127783044       18.57 16.78 ~ 6 0
33 Cl* NGC 2547 JND 8-177 * 08 10 52.1034925464 -49 21 13.797268020   18.753 17.288 16.227 14.776 ~ 8 0
34 DENIS J081100.0-490441 * 08 11 00.0767545920 -49 04 41.345447592         15.06 ~ 5 0
35 CD-48 3575 * 08 11 03.2334284232 -49 00 37.445033088   11.24 10.92     ~ 20 0
36 CD-48 3578 * 08 11 11.3426703216 -49 04 44.292598536   11.44 11.09   10.60 ~ 19 0
37 V* CE Ant TT* 10 42 30.1018928760 -33 40 16.229805204   12.21 10.91   9.10 M2Ve 183 1
38 NAME TW Hya Association As* 11 01.9 -34 42           ~ 897 0
39 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 691 0
40 HD 197481 BY* 20 45 09.5324974119 -31 20 27.237889841   10.05 8.627 9.078 6.593 M1VeBa1 1030 0
41 G 263-10 PM* 21 58 24.5152059768 +75 35 20.608452888       10.163   M1V 72 0

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2022.10.05-20:31:09

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