J/ApJ/837/15 WISE IR excesses among main sequence stars (Da Costa+, 2017)
On the incidence of WISE Infrared excess among solar analog, twin, and
sibling stars.
Da Costa A.D., Canto Martins B.L., Leao I.C., Lima Jr J.E.,
Freire da Silva D., de Freitas D.B., de Medeiros J.R.
<Astrophys. J., 837, 15-15 (2017)>
=2017ApJ...837...15D 2017ApJ...837...15D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, G-type ; Photometry, infrared
Keywords: circumstellar matter; infrared: stars;
stars: individual: HD 86087; stars: solar-type
Abstract:
This study presents a search for infrared (IR) excess in the 3.4, 4.6,
12, and 22µm bands in a sample of 216 targets, composed of solar
sibling, twin, and analog stars observed by the Wide-field Infrared
Survey Explorer (WISE) mission. In general, an IR excess suggests the
existence of warm dust around a star. We detected 12µm and/or
22µm excesses at the 3σ level of confidence in five solar
analog stars, corresponding to a frequency of 4.1% of the entire
sample of solar analogs analyzed, and in one out of 29 solar sibling
candidates, confirming previous studies. The estimation of the dust
properties shows that the sources with IR excesses possess
circumstellar material with temperatures that, within the
uncertainties, are similar to that of the material found in the
asteroid belt in our solar system. No photospheric flux excess was
identified at the W1 (3.4µm) and W2 (4.6µm) WISE bands,
indicating that, in the majority of stars of the present sample, no
detectable dust is generated. Interestingly, among the 60 solar twin
stars analyzed in this work, no WISE photospheric flux excess was
detected. However, a null-detection excess does not necessarily
indicate the absence of dust around a star because different causes,
including dynamic processes and instrument limitations, can mask its
presence.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 173 216 Stellar parameters, including V, 2MASS and WISE
magnitudes and excess significance
χλ for the four WISE bands of the
216 Sun-like stars
--------------------------------------------------------------------------------
See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+, 2007)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
II/328 : AllWISE Data Release (Cutri+ 2013)
J/ApJ/497/330 : Candidate main-sequence stars (Mannings+, 1998)
J/A+AS/141/371 : Low-mass stars isochrones (Girardi+, 2000)
J/A+A/365/545 : Remnant disks around MS stars IR flux (Habing+, 2001)
J/AJ/124/1670 : Post-T Tauri Stars in Sco-Cen Association (Mamajek+, 2002)
J/ApJ/620/1010 : Spitzer 24µm photometry of A dwarfs (Rieke+, 2005)
J/ApJ/636/1098 : Debris disks around solar-type stars (Bryden+, 2006)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/ApJ/653/675 : Spitzer 24µm photometry of A dwarfs (Su+, 2006)
J/A+A/492/277 : Analysis of Collinder 69 stars with VOSA (Bayo+, 2008)
J/MNRAS/427/343 : Infrared excesses of Hipparcos stars (McDonald+, 2012)
J/ApJ/750/98 : 24um observations of AFGKM stars of 3 clusters (Urban+, 2012)
J/ApJ/775/55 : Spitzer IR excesses in A-K stars (Ballering+, 2013)
J/A+A/555/A11 : DUNES survey observational results (Eiroa+, 2013)
J/ApJ/768/25 : Spitzer & Herschel obs. of debris disks (Gaspar+, 2013)
J/ApJS/208/29 : HIP stars with 22µm excess (Wu+, 2013)
J/ApJS/211/25 : Spitzer/IRS debris disk catalog. I. (Chen+, 2014)
J/MNRAS/437/391 : IR excess in Sun-like stars from WISE (Cruz-Saenz+, 2014)
J/AJ/148/3 : Debris disk candidates detected with AKARI/FIS (Liu+, 2014)
J/ApJS/212/10 : WISE IR excesses for stars within 75pc (Patel+, 2014)
J/ApJ/787/154 : Elemental abundances of solar sibling cand. (Ramirez+, 2014)
J/ApJ/785/33 : F4-K2 stars high quality Spitzer/MIPS obs. (Sierchio+, 2014)
J/A+A/574/A124 : Spectroscopy of solar twins and analogues (Datson+, 2015)
J/A+A/575/A51 : Line lists in Sun siblings (Liu+, 2015)
J/ApJS/225/15 : IR excess stars from Tycho-2 and AllWISE (Cotten+, 2016)
J/A+A/593/A51 : Debris discs around nearby FGK stars (Montesinos+, 2016)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 A18 --- Type Solar type (1)
20- 28 A9 --- Name Star identifier (HD or HIP number)
30- 34 F5.2 mag Vmag [3.8/15] The V band magnitude
36- 45 A10 --- SpType MK spectral type
47- 51 I5 K Teff [3925/10500]? Effective temperature
53- 58 F6.2 K e_Teff [4/110]? Uncertainty in Teff
60- 63 F4.2 [cm/s2] log(g) [3.2/5.4]? Log surface gravity
65- 70 F6.2 [cm/s2] e_log(g) [0.01/3]? Uncertainty in log(g)
72- 77 F6.3 [Sun] [Fe/H] [-0.5/0.4]? Metallicity
79- 83 F5.3 [Sun] e_[Fe/H] [0.004/0.1]? Uncertainty in [Fe/H]
85- 97 A13 --- Ref Reference codes (2)
99-103 F5.2 mag Jmag [3.6/13.6] 2MASS J band magnitude
105-109 F5.2 mag Hmag [3.5/13.2] 2MASS H band magnitude
111-115 F5.2 mag Kmag [3.5/13.1] 2MASS Ks band magnitude
117-121 F5.2 mag W1mag [3.4/13.2] WISE 3.4um (W1) band magnitude
123-127 F5.2 mag W2mag [3.1/13.2] WISE 4.6um (W2) band magnitude
129-133 F5.2 mag W3mag [2.5/12.5] WISE 12um (W3) band magnitude
135-139 F5.3 mag W4mag [0.01/9.1]? WISE 22um (W4) band magnitude
141-146 F6.3 --- chi3.4 [-6/8.3] Excess significance at 3.4um (3)
148-153 F6.3 --- chi4.6 [-4.7/7.5] Excess significance at 4.6um (3)
155-155 A1 --- l_chi12 Limit flag on chi12
158-163 F6.3 --- chi12 [-3/20.1] Excess significance at 12um (3)
165-165 A1 --- l_chi22 Limit flag on chi22
168-173 F6.3 --- chi22 [-1.7/17]? Excess significance at 22um (3)
--------------------------------------------------------------------------------
Note (1): Object type as follows:
Siblings = Solar siblings: stars that were born simultaneously with
the Sun (6 occurrences)
Siblings candidates = Solar siblings candidates (29 occurrences)
Twins = Solar twins: stars with high-resolution,
high signal-to-noise ratio (S/N) spectra that are
identical to the spectrum of the Sun, regardless of
their origin (60 occurrences)
Analogs = Solar analogs: stars that are spectroscopically similar
to the Sun and that are known to have stellar
properties close to solar values (121 occurrences)
Note (2): Reference for Vmag, SpType, Teff, logg, [Fe/H] as follows:
1 = Hipparcos (ESA 1997, I/239);
2 = Datson et al. (2015, J/A+A/574/A124);
3 = Hog et al. (2000, I/259);
4 = Houk & Swift (1999, III/214);
5 = Ramirez et al. (2012ApJ...752....5R 2012ApJ...752....5R);
6 = Ramirez et al. (2014, J/ApJ/787/154);
7 = Pasquini et al. (2008A&A...489..677P 2008A&A...489..677P);
8 = Liu et al. (2015, J/A+A/575/A51);
9 = Ducati (2002, II/237);
10 = Gray et al. (2006, J/AJ/132/161);
11 = Chen et al. (2014, J/ApJS/211/25);
12 = Stauffer et al (1995ApJ...454..910S 1995ApJ...454..910S);
13 = Nordstrom et al. (2004, V/117; superseded by V/130);
14 = Chen et al. (2006ApJS..166..351C 2006ApJS..166..351C);
15 = Batista et al. (2014A&A...564A..43B 2014A&A...564A..43B);
16 = Saffe et al. (2008A&A...490..297S 2008A&A...490..297S);
17 = Henden et al (2016, II/336);
18 = Houk & Smith-Moore (1988, III/133).
Note (3): Measurements of the WISE IR excess for each source were made using
the excess significance χλ (Beichman+ 2006ApJ...652.1674B 2006ApJ...652.1674B),
which can be defined as Equation (1):
(Fλobs-Fλphot)/(σobs2+σcal2)0.5
where Fλobs is the observed flux value in the [3.4], [4.6], [12],
or [22] bands; Fλphot is the theoretical photospheric flux value
at the same wavelength computed from photospheric modeling; σobs
represents the errors at F_λobs and σcal are the absolute
calibration uncertainties of the WISE estimated at 2.4%, 2.8%, 4.5%, and
5.7% in the [3.4], [4.5], [12], and [22] bands, respectively.
See section 2.1.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Oct-2017