2008ApJ...677..545V


Query : 2008ApJ...677..545V

2008ApJ...677..545V - Astrophys. J., 677, 545-555 (2008/April-2)

Spitzer 24 µm time series observations of the eclipsing M dwarf binary GU Bootis.

VON BRAUN K., VAN BELLE G.T., CIARDI D.R., LOPEZ-MORALES M., HOARD D.W. and WACHTER S.

Abstract (from CDS):

We present a set of Spitzer 24 µm MIPS time series observations of the M dwarf eclipsing binary star GU Boötis. Our data cover three secondary eclipses of the system: two consecutive events and an additional eclipse 6 weeks later. The study's main purpose is the long-wavelength (and thus limb-darkening-independent) characterization of GU Boo's light curve, allowing for independent verification of the results of previous optical studies. Our results confirm previously obtained system parameters. We further compare GU Boo's measured 24 µm flux density to the value predicted by spectral fitting and find no evidence for circumstellar dust. In addition to GU Boo, we characterize (and show examples of) light curves of other objects in the field of view. Analysis of these light curves serves to characterize the photometric stability and repeatability of Spitzer's MIPS 24 µm array over short (days) and long (weeks) timescales at flux densities between approximately 300 and 2000 µJy. We find that the light-curve rms about the median level falls into the 1%-4% range for flux densities higher than 1 mJy. Finally, we comment on the fluctuations of the 24 µm background on short and long timescales.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Circumstellar Matter - Infrared: Stars - Stars: Fundamental Parameters - stars: individual (GU Boo) - Techniques: Photometric

Nomenclature: Table 3: [VVC2008] NN N=24 among (Nos 2-94).

Simbad objects: 26

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Number of rows : 26
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 HD 42581 Er* 06 10 34.6152510171 -21 51 52.658021185 10.801 9.607 8.125 7.164 6.121 M1V 421 0
2 V* CU Cnc SB* 08 31 37.5740891049 +19 23 39.398696822   12.83 11.809 11.592   M5Ve 207 0
3 2MASS J15214031+3355259 EmG 15 21 40.3494291728 +33 55 25.967565866           ~ 2 0
4 SDSS J152141.26+335310.1 G 15 21 41.26 +33 53 10.1           ~ 1 0
5 SDSS J152143.31+335252.6 G 15 21 43.32 +33 52 52.7           ~ 1 0
6 [VVC2008] 55 G 15 21 44.8862124560 +33 56 48.500504055           ~ 1 0
7 2MASS J15214563+3354466 G 15 21 45.64 +33 54 46.7           ~ 1 0
8 [VVC2008] 37 IR 15 21 46.940 +33 55 49.89           ~ 1 0
9 2MASS J15214889+3356478 G 15 21 48.89 +33 56 47.9           ~ 1 0
10 SDSS J152149.41+335452.4 G 15 21 49.41 +33 54 52.5           ~ 1 0
11 SDSS J152149.59+335718.8 G 15 21 49.60 +33 57 18.9           ~ 1 0
12 [VVC2008] 12 G 15 21 51.6129108272 +33 53 55.059540612           ~ 1 0
13 [VVC2008] 94 IR 15 21 51.670 +33 59 58.95           ~ 1 0
14 2MASS J15215249+3355046 * 15 21 52.5259153048 +33 55 04.897212958           ~ 1 0
15 [VVC2008] 46 IR 15 21 52.710 +33 55 53.94           ~ 1 0
16 [VVC2008] 44 G 15 21 54.22 +33 55 44.1           ~ 1 0
17 V* GU Boo EB* 15 21 54.8242649848 +33 56 09.067728168     13.11     M0/M1.5 90 0
18 SDSS J152156.31+335637.6 * 15 21 56.32 +33 56 37.6           ~ 1 0
19 [VVC2008] 85 IR 15 21 57.430 +33 57 45.84           ~ 1 0
20 SDSS J152157.77+335226.9 G 15 21 57.77136 +33 52 26.9184           ~ 1 0
21 SDSS J152158.83+335915.2 G 15 21 58.860 +33 59 14.34           ~ 1 0
22 [VVC2008] 70 IR 15 21 58.890 +33 56 33.23           ~ 1 0
23 [VVC2008] 65 IR 15 21 59.480 +33 56 20.17           ~ 1 0
24 [VVC2008] 17 IR 15 22 00.150 +33 54 00.34           ~ 1 0
25 2MASS J15220305+3357239 G 15 22 03.05 +33 57 24.0           ~ 1 0
26 HD 209458 V* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 1027 1

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2021.11.30-00:01:58

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