J/AJ/159/135 VRIJHK LCs of the binary T Tauri star V582 Mon (Garcia Soto+, 2020)
Evidence for transparency and clumps in the circumbinary ring of the T Tauri
star V582 Mon (KH 15D).
Garcia Soto A., Ali A., Newmark A., Herbst W., Windemuth D., Winn J.N.
<Astron. J., 159, 135 (2020)>
=2020AJ....159..135G 2020AJ....159..135G
ADC_Keywords: Stars, variable; Stars, pre-main sequence;
Stars, double and multiple; Photometry, VRI; Photometry, infrared
Keywords: Weak-line T Tauri stars ; T Tauri stars ; Binary stars ;
Protoplanetary disks
Abstract:
The binary T Tauri star V582Mon (KH15D) is surrounded by a tilted and
nodally precessing ring of dusty material, which has caused periodic
occultations of one or both stars over the last 50 years. Here, we
present multi-color time-series photometry (VRIJHK) throughout the
2017/2018 observing season, when the ring was covering the entire
orbit of star A and gradually exposing the orbit of star B. We
calculate the mean apparent magnitude of star B to be I=14.08. Besides
the periodic eclipses of star B due to its orbital motion, we observed
unexpected dips in brightness indicative of partially transparent
stellar-sized clumps within the ring. The wavelength dependence of
these events is suggestive of extinction by dust grains significantly
larger than typical interstellar dust grains. The photometric
variability observed while star B is being uncovered by the trailing
edge of the ring is not simply the time reversal of the behavior seen
when star A was being covered by the leading edge. Whereas the leading
edge appeared to be very sharply defined, the trailing edge is
"clumpy" and "fuzzy" (transparent), with a more gradual transition in
opacity. The clumpiness and transparency of the occulting material
provide a unique opportunity to study the properties of dust grains in
a likely planet-forming zone.
Description:
The new optical and near-IR data presented in this paper was obtained
between 2017 October and 2018 April. Images were acquired in the
VRIJHK bands with the 1.3m telescope operated by the Small and
Moderate Aperture Research Telescope System at the Cerro-Tololo
Inter-American Observatory (CTIO) using A Novel Dual Imaging CAMera
(ANDICAM). Each nightly optical observation included four 150s
exposures. Each nightly near-IR observation included 10-15 dithered
30s exposures.
Objects:
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RA (2000) DE Designation(s) (Period)
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06 41 10.34 +09 28 33.5 V582Mon = NAME KH 15D (P = 48.37)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 99 9362 VRIJHK photometry of V582 Mon
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+, 2017)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/A+A/363/1081 : Non-linear limb-darkening law for LTE models (Claret 2000)
J/AJ/140/2025 : KH 15D (V582 Mon) VI light curves (Herbst+, 2010)
J/A+A/548/A97 : Catalogue of variable stars in open clusters (Zejda+, 2012)
J/ApJ/773/54 : Var. stars in and around NGC 2264 with BEST (Klagyivik+, 2013)
J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)
J/AJ/147/9 : VRIJHK light curves of V582 Mon (Windemuth+, 2014)
J/A+A/581/A52 : Gaia-ESO Survey: Hα em. stars catalogue (Traven+, 2015)
J/AJ/151/90 : Spitzer and VRIJHK photometry of V582 Mon (Arulanantham+,2016)
J/A+A/599/A23 : Accretion-rotation connection in NGC 2264 (Venuti+, 2017)
J/AJ/155/47 : VRIJHK photometry of the T Tauri binary KH 15D (Aronow+, 2018)
J/A+A/630/A119 : Gaia DR2 distances to two clusters (Maiz, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD [2450017/2458211] Julian date of observation
14- 19 F6.3 mag Vmag [15.34/21.74]? The V band magnitude
21- 25 F5.3 mag e_Vmag [0/1.7]? The one sigma error in Vmag
27- 32 F6.3 mag Rmag [14.62/19.4]? The R band magnitude
34- 38 F5.3 mag e_Rmag [0.003/0.3]? The one sigma error in Rmag
40- 45 F6.3 mag Imag [14/19.8]? The I band magnitude
47- 51 F5.3 mag e_Imag [0.001/1.1]? The one sigma error in Imag
53- 58 F6.3 mag Jmag [13.16/18.33]? The J band magnitude
60- 64 F5.3 mag e_Jmag [0/0.4]? The one sigma error in Jmag
66- 71 F6.3 mag Hmag [12.43/20]? The H band magnitude
73- 77 F5.3 mag e_Hmag [0/0.3]? The one sigma error in Hmag
79- 84 F6.3 mag Kmag [12.16/19.53]? The K band magnitude
86- 90 F5.3 mag e_Kmag [0.01/2.8]? The one sigma error in Kmag
92- 95 A4 --- Obs Observatory code (1)
97- 99 A3 --- Ref Reference code (2)
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Note (1): Observatory codes as follows:
IRSF = 1.4m Infrared Survey Facility telescope, Sutherland, South Africa
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
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, Middletown, CT
WISE = Wise Observatory, Israel.
Note (2): Reference codes as follows:
H05 = Hamilton+, 2005AJ....130.1896H 2005AJ....130.1896H
H10 = Herbst+, 2010, J/AJ/140/2025
K05 = Kusakabe+, 2005ApJ...632L.139K 2005ApJ...632L.139K
W13 = Windemuth+, 2014, J/AJ/147/9
A16 = Arulanantham+, 2017ApJ...834..119A 2017ApJ...834..119A
A17 = Aronow+, 2018, J/AJ/155/47
A18 = This work.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 04-May-2020