J/ApJ/945/114 Tuc-Hor members with TESS LCs & Gaia data (Popinchalk+, 2023)
Examining the rotation period distribution of the 40 Myr Tucana-Horologium
association with TESS.
Popinchalk M., Faherty J.K., Curtis J.L., Gagne J.,
Bardalez Gagliuffi D.C., Vos J.M., Ayala A., Gonzales L., Kiman R.
<Astrophys. J., 945, 114 (2023)>
=2023ApJ...945..114P 2023ApJ...945..114P
ADC_Keywords: Associations, stellar; YSOs; Photometry; Optical; Ultraviolet;
Parallaxes, trigonometric; Equivalent widths; X-ray sources
Keywords: Stellar rotation ; M dwarf stars ; Light curves ;
Young stellar objects ; Young star clusters
Abstract:
The Tucana-Horologium association (Tuc-Hor) is a 40Myr old moving
group in the southern sky. In this work, we measure the rotation
periods of 313 Tuc-Hor objects with TESS light curves derived from
TESS full-frame images and membership lists driven by Gaia EDR3
kinematics and known youth indicators. We recover a period for 81.4%
of the sample and report 255 rotation periods for Tuc-Hor objects.
From these objects we identify 11 candidate binaries based on multiple
periodic signals or outlier Gaia DR2 and EDR3 renormalized unit weight
error values. We also identify three new complex rotators (rapidly
rotating M dwarf objects with intricate light-curve morphology) within
our sample. Along with the six previously known complex rotators that
belong to Tuc-Hor, we compare their light-curve morphology between
TESS Cycle 1 and Cycle 3 and find that they change substantially.
Furthermore, we provide context for the entire Tuc-Hor rotation sample
by describing the rotation period distributions alongside other youth
indicators such as Hα and Li equivalent width, as well as
near-ultraviolet and X-ray flux. We find that measuring rotation
periods with TESS is a fast and effective means to confirm members in
young moving groups.
Description:
In this work, we used the bona fide (BF), high-likelihood (HM),
candidate members (CM) lists from the BANYAN Σ algorithm
(Gagne+ 2018ApJ...856...23G 2018ApJ...856...23G) using Gaia EDR3 to create our Tuc-Hor
sample and ignored the low-likelihood and rejected members. This led
to an initial list of 382 objects.
For our final Tuc-Hor sample we queried a database that includes
available literature measurements for various signatures of youth
(Gagne J. 2023, private communication); including NUV photometry from
a cross-match with GALEX and X-ray photometry from a cross-match with
ROSAT. See Section 2.1. for further explanations.
On average, four TESS sectors are available up to 2022 June for 313 of
our targets. See Section 2.2.
In all, we found that there were 20 pairs and one triple with
separations <10' within the full Tuc-Hor membership list. We identify
them in Table 3, with their magnitudes, separations, and period
assigned after visual analysis. See Section 4.1.
Objects:
-------------------------------------------------------------------------
RA (ICRS) DE Designation(s)
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00 00 00.00 -62 00 00.0 Tuc-Hor = NAME Tucana Horologium Association
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File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 238 382 Tuc-Hor sample
table2.dat 229 370 Tuc-Hor rotation periods
table3.dat 83 20 Tuc-Hor--Tuc-Hor contamination
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See also:
IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)
II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
J/A+A/460/695 : Search for Assoc. Containing Young stars (Torres+, 2006)
J/AJ/133/2524 : Spectra of young nearby stars (White+, 2007)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/AcA/62/67 : ASAS photometry of ROSAT sources (Kiraga, 2012)
J/AJ/143/93 : Rotational velocities in early-M stars (Reiners+, 2012)
J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)
J/AJ/147/146 : Spectroscopy of Tuc-Hor candidate members (Kraus+, 2014)
J/ApJ/788/81 : BANYAN III. RVel & rotation of low-mass stars (Malo+, 2014)
J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)
J/AJ/147/9 : VRIJHK light curves of V582 Mon (Windemuth+, 2014)
J/MNRAS/454/593 : Young moving groups in solar neighbourhood (Bell+, 2015)
J/A+A/583/A65 : Active Kepler stars differential rotation (Reinhold+, 2015)
J/ApJ/812/3 : MEarth mid-to-late M dwarfs rot. & kinematics (West+, 2015)
J/A+A/588/A103 : 2nd ROSAT all-sky survey (2RXS) source cat. (Boller+, 2016)
J/ApJS/225/10 : Kinematic analysis of M7-L8 dwarfs (Faherty+, 2016)
J/AJ/152/113 : Pleiades members with K2 LCs. I. Periods (Rebull+, 2016)
J/MNRAS/472/675 : Wide binaries in Tycho-Gaia: search method (Andrews+, 2017)
J/ApJ/842/83 : Praesepe members rot. periods from K2 LCs (Douglas+, 2017)
J/A+A/599/A70 : Young moving group M-dwarf multiplicity (Janson+, 2017)
J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017)
J/ApJ/846/93 : The mult. of M dwarfs in young moving groups (Shan+, 2017)
J/AJ/154/69 : ACRONYM II. β Pictoris Moving Group (Shkolnik+, 2017)
J/ApJ/862/33 : Expanded membership cat. for NGC752 (Agueros+, 2018)
J/MNRAS/474/2094 : Inferring probabilistic stellar rot. periods (Angus+, 2018)
J/A+A/613/A63 : Lithium content for 148 Pleiades stars (Bouvier+, 2018)
J/ApJ/862/138 : BANYAN. XIII. Nearby young assoc. with Gaia (Gagne+, 2018)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
J/AJ/155/196 : K2 LCs for members of USco & ρ Oph (Rebull+, 2018)
J/AJ/156/102 : TESS Input Cat. and Candidate Target List (Stassun+, 2018)
J/AJ/156/275 : Rot. evolution of young, binary M dwarfs (Stauffer+, 2018)
J/MNRAS/489/3625 : Applying Chronostar to β Pic group (Crundall+, 2019)
J/AJ/158/77 : Members of the Pisces-Eridanus stream (Curtis+, 2019)
J/AJ/158/122 : Local structure & SFH of the MW (Kounkel+, 2019)
J/A+A/622/L13 : Stellar stream in Gaia DR2 discovery (Meingast+, 2019)
J/AJ/157/234 : ACRONYM. III. Young low-mass stars (Schneider+, 2019)
J/ApJ/903/96 : The µTau Association (MUTA) (Gagne+, 2020)
J/AJ/161/277 : Sample of 45 HαEW outliers (Kiman+, 2021)
J/ApJ/916/77 : K2 rot. periods for SDSS & Gaia M dwarfs (Popinchalk+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR2 Gaia DR2 [source_id]
21- 39 I19 --- GaiaDR3 Gaia DR3 [source_id]
41- 50 F10.6 deg RAdeg Right Ascension (ICRS) at Epoch=2016
52- 61 F10.6 deg DEdeg Declination (ICRS) at Epoch=2016
63- 64 A2 --- Class BANYAN Σ class (1)
66- 71 F6.3 mag Gmag [3.55/21.12]? Gaia DR2 G-band magnitude
73- 78 F6.3 mag BPmag [3.5/23.12]? Gaia DR2 BP-band magnitude
80- 85 F6.3 mag RPmag [3.59/19.6]? Gaia DR2 RP-band magnitude
87- 97 F11.6 --- Gmag/e [52.32/5955.23]? Ratio, Gmag to Gmag error
99- 110 F12.7 --- BPmag/e [1.64/2682.5]? Ratio, BPmag to BPmag error
112- 122 F11.6 --- RPmag/e [8/2520.1]? Ratio, RPmag to RPmag error
124- 142 F19.16 mas plx [-0.94/75.42]? Gaia DR2 parallax
144- 155 F12.7 --- plx/e [-1.24/2203]? Ratio, plx to plx error
157- 167 F11.8 --- RUWE [0.74/32.73]? Gaia DR2 RUWE
169- 174 F6.2 0.1nm EWHa [-36.76/3.54]? Equivalent Width, Hα,
Angstroms
176- 179 F4.2 0.1nm e_EWHa [0.01/0.1]? Uncertainty in EWHa
181- 186 A6 --- r_EWHa Reference for EWHa (2)
188- 193 F6.1 0.1pm EWLi [-89/1340]? Equivalent Width, Li,
milli-Angstroms
195- 198 F4.1 0.1pm e_EWLi [10/50]? Uncertainty in EWLi
200- 205 A6 --- r_EWLi Reference for EWLi (2)
207- 214 E8.3 --- XFlux ? ROSAT X-ray Flux,
Boller+ 2016, J/A+A/588/A103
216- 222 E7.3 --- e_XFlux ? Uncertainty in XFlux
224- 229 F6.3 mag NUVmag [11.8/24]? GALEX NUV magnitude,
Martin+ 2005ApJ...619L...1M 2005ApJ...619L...1M
231- 235 F5.3 mag e_NUVmag [0.002/1.2]? Uncertainty in NUVmag
237- 238 I2 --- NTess [0/25] Number of TESS Sectors observed
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Note (1): Class as follows:
BF = bona fide member (61 occurrences)
HM = high-likelihood member (106 occurrences)
CM = candidate member (215 occurrences)
Note (2): References as follows:
Krau14 = Kraus+ (2014, J/AJ/147/146) Spectroscopy of Tuc-Hor candidate
members
Schn19 = Schneider+ (2019, J/AJ/157/234) ACRONYM. III.
Torr06 = Torres+ (2006, J/A+A/460/695) Search for associations containing
young stars (SACY). I.
Whit07 = White, Gabor, & Hillenbrand (2007, J/AJ/133/2524) High-Dispersion
Optical Spectra of Nearby Stars Younger Than the Sun
Shko17 = Shkolnik+ (2017, J/AJ/154/69) ACRONYM. II.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- GaiaDR2 Gaia DR2 source_id
21- 39 I19 --- GaiaDR3 Gaia DR3 source_id
41- 55 F15.11 d Prot [-22.8/10.3]? Final rotational period
57- 70 F14.12 --- Power-LS [0.002/0.99]?=0 Power of Lomb-Scargle
periodogram peak
72- 74 A3 --- Source Light-curve source (1)
76- 84 A9 --- Class Class (2)
86- 180 A95 --- Notes Notes
182- 196 F15.13 --- Amp [0.0004/2.11]? Normalized amplitude in the
light curve
198- 227 A30 --- Sectors TESS Sectors used
229 I1 --- Fl [0/1]? 1=Presence of flares in light curve
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Note (1): Light curve source as follows:
CPM = Casual pixel-modeling (266 occurrences)
SAP = Simple Aperture Photometry (37 occurrences)
Blank values for No TESS data (67 occurrences).
Note (2): Class as follows:
Publish = Objects with an exceptionally strong period; represent objects
with light curves with distinct and obvious starspot-induced
rotation periods (176 occurrences)
Good = objects with recovered rotation periods but that are not as
strikingly obvious as "Publish" objects (76 occurrences)
Follow up = 16 occurrences
Flat = the light curve showed no rotation period but otherwise
looked astrophysical (no value in Prot; 30 occurrences)
Garbage = light curve looked to be dominated by non-physical systematics
or detrending errors (no value in Prot; 5 occurrences)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- GaiaDR2-1 Gaia DR2 identifier of object 1
21- 39 I19 --- GaiaDR2-2 Gaia DR2 identifier of object 2
41- 46 F6.3 mag Gmag1 [9.4/20.7] Gaia DR2 G-band magnitude of
object 1
48- 53 F6.3 mag Gmag2 [7.38/16] Gaia DR2 G-band magnitude of
object 2
55- 59 F5.3 mag dGmag [0.2/6.2] G-band magnitude difference
61- 67 F7.3 arcsec Sep [2.3/406] Separation between objects
69 A1 --- u_Per1 Uncertain flag on Per1
71- 75 F5.3 d Per1 [0.44/8.4]? Period, days of object 1
77 A1 --- u_Per2 Uncertain flag on Per2
79- 83 F5.3 d Per2 [0.39/4]? Period, days of object 2
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 06-Feb-2025