# Hα Variability in PTFO8-8695 and the Possible Direct Detection of Emission from a 2 Million Year Old Evaporating Hot Jupiter

@article{JohnsKrull2016HVI,
title={H$\alpha$ Variability in PTFO8-8695 and the Possible Direct Detection of Emission from a 2 Million Year Old Evaporating Hot Jupiter},
author={Christopher M. Johns–Krull and Lisa Prato and J. N. Mclane and David R. Ciardi and Julian Christopher van Eyken and Weimin Chen and John R. Stauffer and Charles A. Beichman and Sarah A. Frazier and Andrew F. Boden and M. Morales-Calder{\'o}n and Luisa M. Rebull},
journal={The Astrophysical Journal},
year={2016},
volume={830},
pages={15}
}
We use high time cadence, high spectral resolution optical observations to detect excess Hα emission from the 2–3 Myr old weak-lined T Tauri star PTFO 8-8695. This excess emission appears to move in velocity as expected if it were produced by the suspected planetary companion to this young star. The excess emission is not always present, but when it is, the predicted velocity motion is often observed. We have considered the possibility that the observed excess emission is produced by stellar… Expand

#### Figures and Tables from this paper

Star-disk interaction in the T Tauri star V2129 Ophiuchi: An evolving accretion-ejection structure
Context. Classical T Tauri stars are young low-mass systems still accreting material from their disks. These systems are dynamic on timescales of hours to years. The observed variability can help usExpand
X-ray emission in the enigmatic CVSO 30 system
• Physics
• Astronomy & Astrophysics
• 2019
CVSO 30 is a young, active, weak-line T Tauri star; it possibly hosts the only known planetary system with both a transiting hot-Jupiter and a cold-Jupiter candidate (CVSO 30 b and CVSO 30 c). WeExpand
Orbiting Clouds of Material at the Keplerian Co-rotation Radius of Rapidly Rotating Low-mass WTTs in Upper Sco
Using K2 data, we identified 23 very-low-mass members of the ρ Oph and Upper Scorpius star-forming region as having periodic photometric variability not easily explained by well-established physicalExpand
Evidence for planetary hypothesis for PTFO 8-8695 b with five-year optical/infrared monitoring observations
PTFO 8-8695b (CVSO 30b) is a young planet candidate whose host star is a $\sim$ 2.6 Myr-old T-Tauri star, and there have been continuous discussions about the nature of this system. To unveil theExpand
A Transient Transit Signature Associated with the Young Star RIK-210
We find transient transit-like dimming events within the K2 time series photometry of the young star RIK-210 in the Upper Scorpius OB association. These dimming events are variable in depth,Expand
Properties of CVSO 30 from TESS measurements: probably a binary T Tauri star with complex light curves and no obvious planets
• C. Koen
• Physics
• Monthly Notices of the Royal Astronomical Society
• 2020
‘Transiting Exoplanet Survey Satellite’ (TESS) photometry of CVSO 30 spanned 21.8 d, with a single large gap of 1.1 d. This allows alias-free determination of the two periodicities in the data. ItExpand
Rocky Planet Formation: Quick and Neat
• Physics
• 2016
We reconsider the commonly held assumption that warm debris disks are tracers of terrestrial planet formation. The high occurrence rate inferred for Earth-mass planets around mature solar-type starsExpand
Multi-color simultaneous photometry of the T-Tauri star with planetary candidate, CVSO 30
We present three-band simultaneous observations of a weak-line T-Tauri star CVSO~30 (PTFO~8-8695), which is one of the youngest objects having a candidate transiting planet. The data were obtainedExpand
9 Series of Evidences of Periodical Bursts of Young Stars and Planets
Fred Hoyle, the famous British astronomer, had the idea that matters explode from the Sun form planets. This paper develops this idea into the theory of periodical bursts of young stars and planets,Expand
Kepler-78 and the Ultra-Short-Period planets
• Physics
• New Astronomy Reviews
• 2018
Compared to the Earth, the exoplanet Kepler-78b has a similar size (1.2 $R_\oplus$) and an orbital period a thousand times shorter (8.5 hours). It is currently the smallest planet for which the mass,Expand

#### References

SHOWING 1-10 OF 103 REFERENCES
FOLLOW-UP OBSERVATIONS OF PTFO 8-8695: A 3 MYR OLD T TAURI STAR HOSTING A JUPITER-MASS PLANETARY CANDIDATE
We present Spitzer 4.5 μm light curve observations, Keck NIRSPEC radial velocity observations, and LCOGT optical light curve observations of PTFO 8-8695, which may host a Jupiter-sized planet in aExpand
A HUBBLE SPACE TELESCOPE SURVEY OF H2 EMISSION IN THE CIRCUMSTELLAR ENVIRONMENTS OF YOUNG STARS
The formation timescale and final architecture of exoplanetary systems are closely related to the properties of the molecular disks from which they form. Observations of the spatial distribution andExpand
COMPLEX VARIABILITY OF THE Hα EMISSION LINE PROFILE OF THE T TAURI BINARY SYSTEM KH 15D: THE INFLUENCE OF ORBITAL PHASE, OCCULTATION BY THE CIRCUMBINARY DISK, AND ACCRETION PHENOMENA
• Physics
• 2012
We have obtained 48 high-resolution echelle spectra of the pre-main-sequence eclipsing binary system KH 15D (V582 Mon, P = 48.37 days, e ~ 0.6, MA = 0.6 M ☉, MB = 0.7 M ☉). The eclipses are caused byExpand
The weak-line T Tauri star V410 Tau - II. A flaring star
We show that V410 Tau, a weak-line T Tauri star, is a flaring star. This result comes from an intensive, coordinated monitoring campaign carried out in November 2001 at visible and X-ray wavelengthExpand
TW Hydrae: evidence of stellar spots instead of a Hot Jupiter
Context. TW Hya is a classical T Tauri star that shows significant radial-velocity variations in the optical regime. These variations have been attributed to a 10 MJup planet orbiting the star atExpand
Periodic Accretion from a Circumbinary Disk in the Young Binary UZ Tau E
Close pre-main-sequence binary stars are expected to clear central holes in their protoplanetary disks, but the extent to which material can flow from the circumbinary disk across the gap onto theExpand
Tests of the planetary hypothesis for PTFO 8-8695b
The T Tauri star PTFO 8-8695 exhibits periodic fading events that have been interpreted as the transits of a giant planet on a precessing orbit. Here we present three tests of the planet hypothesis.Expand
MASS TRANSFER, TRANSITING STREAM, AND MAGNETOPAUSE IN CLOSE-IN EXOPLANETARY SYSTEMS WITH APPLICATIONS TO WASP-12
• Physics, Biology
• 2010
It is shown that the cylinder-shaped accretion stream can have an area comparable to that of the planet and a significant optical depth to spectral line absorption, and may produce an earlier ingress of thePlanet transit, as suggested by recent Hubble Space Telescope observations of the WASP-12 system. Expand
The Planet-Metallicity Correlation
• Physics
• 2005
We have recently carried out spectral synthesis modeling to determine Teff, log g, v sin i, and [Fe/H] for 1040 FGK-type stars on the Keck, Lick, and Anglo-Australian Telescope planet searchExpand
The PTF Orion Project: a Possible Planet Transiting a T-Tauri Star
We report observations of a possible young transiting planet orbiting a previously known weak-lined T-Tauri star in the 7–10 Myr old Orion-OB1a/25-Ori region. The candidate was found as part of theExpand