J/ApJ/555/932 IR fluxes of solar-type stars (Spangler+, 2001)
Dusty debris around solar-type stars: temporal disk evolution.
Spangler C., Sargent A.I., Silverstone M.D., Becklin E.E., Zuckerman B.
<Astrophys. J. 555, 932 (2001)>
=2001ApJ...555..932S 2001ApJ...555..932S
ADC_Keywords: Stars, pre-main sequence ; Infrared sources
Keywords: circumstellar matter - infrared: stars -
open clusters and associations: general - planetary systems
Abstract:
Using ISO-ISOPHOT, we carried out a survey of almost 150 stars to
search for evidence of emission from dust orbiting young main-sequence
stars, both in clusters and isolated systems. Over half of the
detections are new examples of dusty stellar systems and demonstrate
that such dust can be detected around numerous stars older than a few
times 106yr. Fluxes at 60 and either 90 or 100µm or the new
excess sources together with improved fluxes for a number of
IRAS-identified sources are presented. Analysis of the excess
luminosity relative to the stellar photosphere shows a systematic
decline of this excess with stellar age consistent with a power-law
index of -2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 16 19 Young field star ages
table3.dat 71 63 Targets observed in chopped mode
table4.dat 71 85 Targets observed in raster mode
table5.dat 122 40 Properties of stars with infrared excess
table6.dat 72 21 PMS stars with infrared excess in Chamaeleon I
and Upper Scorpius
table7.dat 69 19 Open clusters and young field stars: IRAS PSC
and FSC fluxes and new photometry of stars with
infrared excess
notes.dat 80 52 Notes to tables 6 and 7
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Target name
12- 14 I3 Myr Age ? Age
16 I1 --- r_Age ? Reference for Age (1)
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Note (1): Reference for Age as follows:
1 = Henry et al., 1996, Cat. J/AJ/111/439
2 = Griffin, 1992Obs...112...41G 1992Obs...112...41G
3 = Favata et al., 1993A&A...277..428F 1993A&A...277..428F
4 = This paper
5 = Duncan et al., 1991ApJS...76..383D 1991ApJS...76..383D
6 = Henry, Fekel, & Hall, 1995AJ....110.2926H 1995AJ....110.2926H
7 = Jeffries, 1995MNRAS.273..559J 1995MNRAS.273..559J
8 = Mantegazza et al., 1992A&A...256..459M 1992A&A...256..459M
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Field Field name (1)
19- 33 A15 --- Name Target name (2)
34 A1 --- n_Name [*] RX J1048.9-7765 (original) corrected into
RX J1048.9-7655 by CDS
35- 45 A11 --- SpType Spectral type
47- 52 F6.3 Jy S60um Flux density at 60µm
54- 58 F5.3 Jy e_S60um rms uncertainty on S60um
60- 65 F6.3 Jy S100um Flux density at 100µm
67- 71 F5.3 Jy e_S100um rms uncertainty on S100um
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Note (1): Field names are:
-- Chamaeleon I, Coma Berenices, Ursa Major and
Young Field Stars in table3,
-- alpha Persei, Chamaeleon I, Hyades, Pleiades, Taurus, Upper Scorpius,
Ursa Major, Other and Young Field Stars in table4.
Note (2): Target names as follows:
Tr NNN = Cl Melotte 111 NNN in Simbad
HII NNN = Cl Melotte 22 NNN in Simbad
HE NNN = Heckmann et al., 1956AN....283..109H 1956AN....283..109H,
Cl Melotte 20 NNN in Simbad
AP NNN = Stauffer et al., 1985ApJ...289..247S 1985ApJ...289..247S,
Cl* Melotte 20 AP NNN in Simbad
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Field Field (1)
18 A1 --- n_Field [DN] D for detection stars,
N for nondetected or contaminated stars
20- 34 A15 --- Name Target name
36- 42 A7 --- SpType Spectral type
44- 47 F4.1 mag Vmag ? V magnitude
49- 52 F4.2 mag B-V ? B-V colour index
54 A1 --- l_vsini Limit flag on vsini
55- 56 I2 km/s vsini ? Rotational velocity
58- 62 F5.1 pc Dist Distance of the star
63 A1 --- u_Dist [?] Uncertainty flag on Dist
65 A1 --- l_Age Limit flag on Age
66- 68 I3 Myr Age ? Age
70-122 A53 --- Rem Remarks on multiplicity
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Note (1): Fields names are:
alpha Persei, Chamaeleon I, Coma Berenices, Hyades, Pleiades,
Upper Scorpius, Ursa Major, Other and Young Field Stars
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1 A1 --- Flag [ND] D for detected stars,
N for nondetected or contaminated PMS stars
3- 17 A15 --- Name Target name
19 A1 --- l_S12um1 Limit flag on S12um1
20- 24 I5 mJy S12um1 ? IRAS flux at 12µm
26 A1 --- l_S25um1 Limit flag on S25um1
27- 31 I5 mJy S25um1 ? IRAS flux at 25µm
33 A1 --- l_S60um1 Limit flag on S60um1
34- 37 I4 mJy S60um1 ? IRAS flux at 60µm
38 A1 --- n_S60um1 [b] Note on S60um1 (1)
40 A1 --- l_S100um1 Limit flag on S100um1
41- 45 I5 mJy S100um1 ? IRAS flux at 100µm
46 A1 --- n_S100um1 [b] Note on S100µm1
48- 49 A2 --- l_S60um2 [≤ ] Limit flag on S60um2
50- 54 I5 mJy S60um2 ISO flux at 60µm (2)
56- 57 A2 --- l_S100um2 [≤ ] Limit flag on S100um2
58- 62 I5 mJy S100um2 ISO flux at 100µm (2)
63 A1 --- n_S100um2 [c] Note on S100um2 (1)
64- 69 F6.1 10-4 fd ? Fractional excess luminosity (3)
71- 72 I2 --- Notes ? Notes in notes.dat file (4)
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Note (1): Notes as follows:
b = From co-added IRAS data and DECON (Weaver & Jones 1992,
Cat. J/ApJS/78/239).
c = Raster measurement at 90µm.
Note (2): Photospheric estimates have not been subtracted from the fluxes
presented. Upper limits given are 3σ.
Note (3): Dust to stellar bolometric luminosity ratio
Note (4): The list also contains the Chamaeleon I targets observed but not
clearly detected for comparison.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Field Field (1)
20- 28 A9 --- Name Target name
30 A1 --- l_S12um1 Limit flag on S12um1
31- 33 I3 mJy S12um1 ? IRAS flux density at 12µm
35 A1 --- l_S25um1 Limit flag on S25um1
36- 38 I3 mJy S25um1 ? IRAS flux density at 25µm
40 A1 --- l_S60um1 Limit flag on S60um1
41- 43 I3 mJy S60um1 ? IRAS flux density at 60µm
45 A1 --- l_S100um1 Limit flag on S100um1
46- 49 I4 mJy S100um1 ? IRAS flux density at 100µm
51 A1 --- l_S60um2 Limit flag on S60um2
52- 54 I3 mJy S60um2 ISO flux density at 60µm (2)
56 A1 --- l_S90um2 Limit flag on S90um2
57- 59 I3 mJy S90um2 ISO flux density at 90µm (2)
60 A1 --- n_S90um2 [b] if chopped upper limit at 100µm
62- 66 F5.2 10-4 fd Factional excess luminosity
68- 69 I2 --- Notes ? Notes in notes.dat file
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Note (1): Field names are:
alpha Persei, Coma Berenices, Hyades, Pleiades, Ursa Major, Other
and Young Field Stars
Note (2): Photospheric estimates have not been subtracted from the fluxes
presented. Upper limits given are 3σ
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Note Note number
4- 80 A77 --- Text Text of the note
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 24-Apr-2002