J/ApJ/923/90 LCOGT V-band monitoring of TYC 8830 410 1 (Melis+, 2021)
Highly structured inner planetary system debris around the intermediate age
Sun-like star TYC 8830 410 1.
Melis C., Olofsson J., Song I., Sarkis P., Weinberger A.J., Kennedy G.,
Krumpe M.
<Astrophys. J., 923, 90-90 (2021)>
=2021ApJ...923...90M 2021ApJ...923...90M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, G-type; Photometry, UBV
Keywords: Circumstellar disks; Exoplanet systems; Variable stars
Abstract:
We present a detailed characterization of the extremely dusty
main-sequence star TYC 8830 410 1. This system hosts inner planetary
system dust (Tdust∼300K) with a fractional infrared luminosity of
∼1%. Mid-infrared spectroscopy reveals a strong, mildly crystalline
solid-state emission feature. TYC8830-410-1 (spectral type G9V) has a
49.5" separation M4-type companion comoving and co-distant with it,
and we estimate a system age of ∼600Myr. TYC8830-410-1 also
experiences "dipper"-like dimming events as detected by the All-Sky
Automated Survey for Supernovae, Transiting Exoplanet Survey
Satellite, and characterized in more detail with the Las Cumbres
Observatory Global Telescope. These recurring eclipses suggest at
least one roughly star-sized cloud of dust orbits the star in addition
to assorted smaller dust structures. The extreme properties of the
material orbiting TYC8830-410-1 point to dramatic dust-production
mechanisms that likely included something similar to the giant impact
event thought to have formed the Earth-Moon system, although hundreds
of millions of years after such processes are thought to have
concluded in the solar system. TYC 8830 410 1 holds promise to deliver
significant advances in our understanding of the origin, structure,
and evolution of extremely dusty inner planetary systems.
Description:
Multiple epochs of optical echelle spectroscopy (R∼48000) were
obtained for TYC 8830 410 1 with the Fiber-fed Extended Range Optical
Spectrograph (FEROS) at the MPG/ESO 2.2m telescope at La Silla
Observatory. See Section 3.1.
Observations with the Magellan Echellette (MagE) at Magellan/Baade
were obtained for the wide-separation companion on UT 2019 November 10
(R∼8000 from 4100-10600Å). See Section 3.2.
Mid-infrared imaging and spectroscopy were obtained with the VLT
Imager and Spectrometer for mid-InfraRed (VISIR) instrument mounted on
VLT-Melipal at Paranal Observatory. Imaging observations were
conducted on UT 2016 January 4. Observations were performed with the
PAH1 filter (8.59um central wavelength and a half bandwidth of 0.42um)
and exposed for a total of 2440s on source.
Spectroscopic observations were conducted over four nights:
UT 2016 September 23, 2016 September 25, 2016 October 1, and
2016 October 4 (R∼300 from 7.5-14um). See Section 3.3.
Las Cumbres Observatory Global Telescope (LCOGT) monitoring of
TYC8830-410-1 has been ongoing since 2020 April. In this paper we
present single-band monitoring data obtained through the end of
2020-September. Images were acquired with the 0.4m robotic telescope
network and were requested to be obtained with a cadence of 2hr.
See Section 3.7
Objects:
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RA (ICRS) DE Designation(s)
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23 01 12.63 -58 58 21.7 TYC 8830 410 1 = Gaia DR3 649160657412129971
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 22 484 TYC 8830 410 1 Las Cumbres Observatory Global
Telescope (LCOGT) V-band photometric monitoring
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See also:
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d MJD [58953.79/59122.83] Modified Julian Date
13- 17 F5.2 mag Vmag [11.45/12.62] Apparent V band Vega magnitude
19- 22 F4.2 mag e_Vmag [0.01/0.2] Uncertainty in Vmag
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 17-May-2023