J/AJ/151/90 Spitzer and VRIJHK photometry of V582 Mon (Arulanantham+, 2016)
Seeing through the ring: near-infrared photometry of V582 Mon (KH 15D).
Arulanantham N.A., Herbst W., Cody A.M., Stauffer J.R., Rebull L.M.,
Agol E., Windemuth D., Marengo M., Winn J.N., Hamilton C.M., Mundt R.,
Johns-Krull C.M., Gutermuth R.A.
<Astron. J., 151, 90 (2016)>
=2016AJ....151...90A 2016AJ....151...90A (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, variable ; Photometry, UBVRIJKLMNH ;
Photometry, infrared
Keywords: open clusters and associations: individual (NGC 2264) -
protoplanetary disks - stars: individual (KH15D) -
stars: pre-main sequence
Abstract:
We examine the light and color evolution of the T Tauri binary KH 15D
through photometry obtained at wavelengths between 0.55 and 8.0µm.
The data were collected with A Novel Dual Imaging CAMera (ANDICAM) on
the 1.3m SMARTS telescope at Cerro-Tololo Inter-American Observatory
and with InfraRed Array Camera on the Spitzer Space Telescope. We show
that the system's circumbinary ring, which acts as a screen that
covers and uncovers different portions of the binary orbit as the ring
precesses, has reached an orientation where the brighter component
(star B) fully or nearly fully emerges during each orbital cycle. The
fainter component (star A) remains fully occulted by the screen at all
phases. The leading and trailing edges of the screen move across the
sky at the same rate of ∼15m/s, consistent with expectation for a ring
with a radius and width of ∼4 au and a precession period of ∼6500
years. Light and color variations continue to indicate that the screen
is sharp edged and opaque at VRIJH wavelengths. However, we find an
increasing transparency of the ring edge at 2.2, 3.6, and 4.5µm.
Reddening seen at the beginning of the eclipse that occurred during
the CSI 2264 campaign particularly suggests selective extinction by a
population of large dust grains. Meanwhile, the gradual bluing
observed while star B is setting is indicative of forward scattering
effects at the edge of the ring. The spectral energy distribution of
the system at its bright phase shows no evidence of infrared excess
emission that can be attributed to radiation from the ring or other
dust component out to 8µm.
Description:
We have continued to obtain ground-based optical and near-infrared
photometry over the last two years using A Novel Dual Imaging CAMera
(ANDICAM) on the 1.3m telescope at Cerro-Tololo Inter-American
Observatory (CTIO) in Chile. The instrument is operated by the SMARTS
consortium. Data were collected almost nightly from 2013 October
through 2014 April. Observations were resumed in 2014 September and
continued until 2015 April. Each night, four 150s exposures were
obtained in each of the three optical bands (VRI) along with 10-15
dithered exposures (30s each) in the near-infrared bands (JHK). All
images have a 10.2'*10.2' field of view. The data acquisition and
reduction processes are discussed briefly in Appendix A, and a more
complete description is given by Windemuth & Herbst 2014 (cat.
J/AJ/147/9). The VRIJHK magnitudes from the last two observing seasons
have been added to the entire set of CCD data obtained since 1995,
which is presented here as Table1.
Images of KH 15D were collected with the InfraRed Array Camera (IRAC)
on the Spitzer Space Telescope during six observational runs with five
separate PI's spanning three distinct epochs since 2004 (2004 Mar 6
and 2004 Oct 08, PI Giovanni Fazio, Program ID=37; 2004 Oct 5-12 and
2005 Oct 21-29, PI Massimo Marengo, Program ID=3441; 2006 Mar 23-27,
PI Eric Agol, Program ID=3469; 2008 Nov 1-2, PI Lucas A. Cieza,
Program ID=50773). The fifth set of observations was obtained by the
CSI 2264 team (PI=John R. Stauffer, Program ID=61027, 80040) as part
of a large campaign to monitor young variable objects in NGC2264 (Cody
et al. 2014, cat. J/AJ/147/82). These data were obtained over 28
consecutive days of observation in 2011 December (2011 Dec 3-2012 Jan
1). A final set of observations was obtained on eight nights between
2013 December and 2014 January (2013 Dec 22-2014 Jan 20, PI William
Herbst, Program ID=90154, 90098). The full set of Spitzer photometry
at all epochs is given in Table3.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
06 41 10.31 +09 28 33.2 KH 15D = V* V582 Mon
----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 8946 VRIJHK photometry of KH 15D
table3.dat 63 356 Spitzer photometry of KH 15D
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See also:
J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)
J/AJ/147/9 : VRIJHK light curves of V582 Mon (Windemuth+, 2014)
J/AJ/140/2025 : KH 15D (V582 Mon) VI light curves (Herbst+, 2010)
J/AJ/114/2644 : UBVRIHa photometry of NGC2264 (Sung+, 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.2 d JD Observation Julian Date
12- 16 F5.2 mag Vmag [15.4/21.8]?=99.99 V band magnitude
18- 22 F5.3 mag e_Vmag [0/1.16]?=9.999 Uncertainty in Vmag
24- 28 F5.2 mag Rmag [14.7/19.4]?=99.99 R band magnitude
30- 34 F5.3 mag e_Rmag [0.003/0.29]?=9.999 Uncertainty in Rmag
36- 40 F5.2 mag Imag [14/19.8]?=99.99 I band magnitude
42- 46 F5.3 mag e_Imag [0.001/1.1]?=9.999 Uncertainty in Imag
48- 52 F5.2 mag Jmag [13.2/18.4]?=99.99 J band magnitude
54- 58 F5.3 mag e_Jmag [0/0.31]?=9.999 Uncertainty in Jmag
60- 64 F5.2 mag Hmag [12.5/20]?=99.99 H band magnitude
66- 70 F5.3 mag e_Hmag [0/0.22]?=9.999 Uncertainty in Hmag
72- 76 F5.2 mag Kmag [12.3/19.7]?=99.99 K band magnitude
78- 82 F5.3 mag e_Kmag [0.01/5.96]?=9.999 Uncertainty in Kmag
84- 87 A4 --- Obs Observatory and/or instrument (IRSF, ESO,
CTIO, KAIT, KONK, KPNO, MMO, TEN, TENE, USNO,
UZBK, VVO, or WISE) (1)
89- 91 A3 --- Ref Paper reference to original data (H05, H10,
K05, W13, or A16) (2)
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Note (1): Facility where data were obtained is defined as below:
IRSF = 1.4m Infrared Survey Facility telescope;
ESO = European Southern Observatory, La Silla, Chile;
CTIO = Cerro Tololo Inter-American Observatory SMARTS 1.3m telescope
ANDICAM;
KAIT = Katzman Automated Telescope, Mt. Hamilton, CA;
KONK = Konkoly Observatory, Hungary;
KPNO = Kitt Peak National Observatory telescopes;
MMO = Not explained in the text;
TEN = Tenagra Observatory, Nogales, AZ;
TENE = Teide Observatory, Tenerife, Spain;
USNO = US Naval Observatory's 1.3m and 1m telescopes;
UZBK = Mount Maidanak Observatory, Uzbekistan;
VVO = Van Vleck Observatory, Wesleyan University, Middletown, CT;
WISE = Wise Observatory, Israel.
Note (2): Code for paper references to original data is defined as below:
H05 = Hamilton et al. (2005AJ....130.1896H 2005AJ....130.1896H);
H10 = Herbst et al. 2010 (cat. J/AJ/140/2025);
K05 = Kusakabe et al. (2005ApJ...632L.139K 2005ApJ...632L.139K);
W13 = Windemuth & Herbst 2014 (cat. J/AJ/147/9);
A16 = Arulanantham et al. 2016 (cat. J/AJ/151/90; this paper).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 F10.2 d JD Observation Julian Date
12- 17 F6.3 mag [3.6] [12.5/18.91]?=99.999 Spitzer/IRAC 3.6µm band
magnitude
19- 23 F5.3 mag e_[3.6] [0.06/1.5]?=9.999 Uncertainty in [3.6]
25- 30 F6.3 mag [4.5] [11.8/22.3]?=99.999 Spitzer/IRAC 4.5µm band
magnitude
32- 37 F6.3 mag e_[4.5] [0.07/6.6]?=9.999 Uncertainty in [4.5]
39- 44 F6.3 mag [5.8] [12.3/15.5]?=99.999 Spitzer/IRAC 5.8µm band
magnitude
46- 50 F5.3 mag e_[5.8] [0.09/0.37]?=9.999 Uncertainty in [5.8]
52- 57 F6.3 mag [8.0] [11.8/14.5]?=99.999 Spitzer/IRAC 8.0µm band
magnitude
59- 63 F5.3 mag e_[8.0] [0.127/0.427]?=9.999 Uncertainty in [8.0]
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History:
From electronic version of the journal
(End) Prepared by [AAS]; Sylvain Guehenneux [CDS] 25-Jul-2016