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J/ApJ/700/1647 Search for planetary companions with Spitzer/IRAC (Marengo+ 2009)

Spitzer/Infrared array camera limits to planetary companions of Fomalhaut and ε Eridani. Marengo M., Stapelfeldt K., Werner M.W., Hora J.L., Fazio G.G., Schuster M.T., Carson J.C., Megeath S.T. <Astrophys. J., 700, 1647-1657 (2009)> =2009ApJ...700.1647M
ADC_Keywords: Photometry, infrared ; Stars, double and multiple ; Stars, nearby Keywords: infrared: stars - planetary systems - stars: individual (Fomalhaut, epsilon Eridani) Abstract: Fomalhaut and ε Eridani are two young, nearby stars that possess extended debris disks whose structures suggest the presence of perturbing planetary objects. With its high sensitivity and stable point-spread function, Spitzer/Infrared Array Camera (IRAC) is uniquely capable of detecting cool, Jupiter-like planetary companions whose peak emission is predicted to occur near 4.5um. We report on deep IRAC imaging of these two stars, taken at 3.6 and 4.5um using subarray mode and in all four channels in wider-field full array mode. Observations acquired at two different telescope roll angles allowed faint surrounding objects to be separated from the stellar diffraction pattern. No companion candidates were detected at the reported position of Fomalhaut b with 3σ model-dependent mass upper limits of 3MJ (for an age of 200Myr). Around ε Eridani, we instead set a limit of 4 and ≲1MJ (1Gyr model age) at the inner and outer edge of the submillimeter debris ring, respectively. These results are consistent with non-detections in recent near-infrared imaging searches, and set the strongest limits to date on the presence of planets outside ε Eridani submillimeter ring. Description: Observations with Spitzer/IRAC in 3.6, 4.5 and 5.8, 8.0um were obtained during eight date between the JD 2453014.336 and 2454356.699. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table6.dat 65 22 Fomalhaut 3.6um dropout sources table7.dat 65 33 ε Eridani 3.6um dropout sources
See also: J/ApJ/612/481 : Optical brightness of ε Eri dust ring (Proffitt+, 2004) Byte-by-byte Description of file: table6.dat table7.dat
Bytes Format Units Label Explanations
1- 10 F10.6 deg RAdeg Right ascension in decimal degrees (J2000) 12- 21 F10.6 deg DEdeg Declination in decimal degrees (J2000) 23- 26 I4 AU Dist Distance 28- 32 F5.2 mag [4.5] Spitzer/IRAC 4.5um-band magnitude 34- 37 F4.2 mag e_[4.5] Uncertainty of 4.5um magnitude 39- 43 F5.2 mag [5.8] ? Spitzer/IRAC 5.8um-band magnitude 45- 48 F4.2 mag e_[5.8] ? Uncertainty of 5.8um magnitude 50- 54 F5.2 mag [8.0] ? Spitzer/IRAC 8.0um-band magnitude 56- 59 F4.2 mag e_[8.0] ? Uncertainty of 8.0um magnitude 61- 65 A5 --- Note Note(s) (1)
Note (1): Notes as follows: 1 = [4.5]-[5.8] or [4.5]-[8.0] color suggest source being a background giant. 2 = Source listed in Table 5, Marengo et al. (2006ApJ...647.1437M; <[MMF2006] NN> in Simbad). 3 = Source 11 in Table 3, Marengo et al. (2006ApJ...647.1437M). 4 = Within field of view, but not detected by Macintosh et al. (2003ApJ...594..538M; <[MBK2003] eps Eri NN> in Simbad).
Nomenclature Notes: Sources are <[MSW2009] DDD.dddddd+DD.dddddd> for Simbad. History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 12-Aug-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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