J/ApJ/877/29 Opt & NIR SMARTS/ANDICAM photometry for DQ Tau (Muzerolle+, 2019)
The inner disk and accretion flow of the close binary DQ Tau.
Muzerolle J., Flaherty K., Balog Z., Beck T., Gutermuth R.
<Astrophys. J., 877, 29 (2019)>
=2019ApJ...877...29M 2019ApJ...877...29M
ADC_Keywords: Binaries, spectroscopic; Stars, pre-main sequence;
Photometry, UBVRI; Photometry, infrared
Keywords: accretion, accretion disks ; binaries: close ; protoplanetary disks ;
stars: individual (DQ Tau) ; stars: pre-main sequence
Abstract:
We present multiepoch optical and near-infrared (NIR) photometry and
spectroscopy of the spectroscopic binary T Tauri star DQ Tau. The
photometric monitoring, obtained using SMARTS ANDICAM, recovers the
previously seen correlation between optical flux and the 15.8d
binary orbital period, with blue flux peaks occurring close to most
observed periastron passages. For the first time, we find an even more
consistent correlation between orbital period and NIR brightness and
color. The onset of pulse events in the NIR precedes those in the
optical by a few days, on average, with the rise usually starting near
apastron orbital phase. We further obtained five epochs of
spectroscopy using Infrared Telescope Facility (IRTF) SpeX, with a
wavelength range of 0.8-5µm, and derived spectra of the infrared
excess emission. The shape and strength of the excess varies with
time, with cooler and weaker characteristic dust emission
(T∼1100-1300K) over most of the binary orbit, and stronger/warmer dust
emission (T∼1600K, indicative of dust sublimation) just before
periastron passage. We suggest that our results are broadly consistent
with predictions of simulations of disk structure and accretion flows
around close binaries, with the varying dust emission possibly tracing
the evolution of accretion streams falling inward through a
circumbinary disk cavity and feeding the accretion pulses traced by
the optical photometry and NIR emission lines. However, our results
also show more complicated behavior that is not fully explained by
this simple picture, and will require further observations and
modeling to fully interpret.
Description:
We observed DQ Tau, during 2012 Nov 15-2013 Jan 30 and 2013 Sep 9 -
2014 Feb 3, with the ANDICAM instrument on the CTIO 1.3m telescope,
operated by the SMARTS Consortium. The optical channel has a field of
view of ∼6'x6' and detector pixel scale of ∼0.3", while the NIR
channel has a field of view of ∼2.4'x2.4' and detector pixel scale of
∼0.2". We used BVI filters (standard KPNO Johnson-Cousins) with the
optical channel and JHK filters (CIT/CTIO) with the infrared channel.
We observed DQ Tau with the SpeX spectrograph at Infrared Telescope
Facility (IRTF) on 2012 Dec 13, 22, and 30 and 2013 Jan 5 and 8; with
a combined wavelength coverage of 0.8 to 5um for a spectral resolution
of ∼1000 (see Figure 1).
Objects:
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RA (ICRS) DE Designation(s)
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04 46 53.06 +17 00 00.1 DQ Tau = Gaia DR2 3406269842981827712
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 127 166 SMARTS/ANDICAM photometry for DQ Tau
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See also:
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer- Jones+, 2018)
J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)
J/AJ/118/1043 : Herbig Ae/Be stars catalog (Herbst+, 1999)
J/ApJ/704/531 : The coevality of young binary systems (Kraus+, 2009)
J/ApJS/186/111 : Spitzer observations of Taurus members (Luhman+, 2010)
J/ApJ/751/115 : Millimeter emission from Taurus binary systems (Harris+, 2012)
J/other/Nat/493.378 : LRL 54361 Spitzer light curves (Muzerolle+, 2013)
J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)
J/ApJ/784/126 : IR photometry of all known members in Taurus (Esplin+, 2014)
J/ApJ/786/97 : Photospheric properties of T Tauri stars (Herczeg+, 2014)
J/ApJ/811/131 : UBV light curves of DQ Tau and UZ Tau E (Ardila+, 2015)
J/A+A/594/A59 : Far-IR lines in YSOs Herschel-PACS (Riviere-Marichalar+, 2016)
J/AJ/151/146 : IRS spectra with features of silicates (Chen+, 2016)
J/ApJ/835/8 : UBVR phot. of the T Tauri binary DQ Tau (Tofflemire+, 2017)
J/AJ/153/46 : Spectroscopy of candidate members in Taurus (Luhman+, 2017)
J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)
J/A+A/619/A32 : CARMENES SB2 orbital parameters (Baroch+, 2018)
J/A+A/630/A137 : Structure and kinematics of the Taurus region (Galli+, 2019)
J/A+A/638/A85 : 3D view of Taurus with Gaia & Herschel (Roccatagliata+, 2020)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 d JD [6246.72/6691.57] Julian Date; JD-2450000
9- 17 F9.4 mag Bmag [11.6/15.4]?=-999 The B band magnitude
19- 27 F9.4 mag e_Bmag [0.007/0.3]?=-999 1σ uncertainty in Bmag
29- 37 F9.4 mag Vmag [10.8/13.7]?=-999 The V band magnitude
39- 47 F9.4 mag e_Vmag [0.004/0.6]?=-999 1σ uncertainty in Vmag
49- 57 F9.4 mag Imag [9.5/11.4]?=-999 The I band magnitude
59- 67 F9.4 mag e_Imag [0/0.05]?=-999 1σ uncertainty in Imag
69- 77 F9.4 mag Jmag [8.4/9.6]?=-999 The J band magnitude
79- 87 F9.4 mag e_Jmag [0.0003/0.4]?=-999 1σ uncertainty in Jmag
89- 97 F9.4 mag Hmag [7.6/8.6]?=-999 The H band magnitude
99-107 F9.4 mag e_Hmag [0.0002/0.3]?=-999 1σ uncertainty in Hmag
109-117 F9.4 mag Kmag [7/8.3]?=-999 The K band magnitude
119-127 F9.4 mag e_Kmag [0.0001/0.4]?=-999 1σ uncertainty in Kmag
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 20-Nov-2020