Simultaneous multicolour optical and near-IR transit photometry of GJ 1214b with SOFIA

Angerhausen, Daniel; Dreyer, C.; Placek, Ben; Csizmadia, Sz.; Eigmüller, Philipp; Godolt, M.; Kitzmann, Daniel; Mallonn, M.; Becklin, E. E.; Collins, Peter L.; Dunham, E. W.; Grenfell, John Lee; Hamilton, Ryan; Kabáth, P.; Logsdon, Sarah E.; Mandell, Avi M.; Mandushev, Georgi; McElwain, Michael W.; McLean, Ian S.; Pfueller, E.; Rauer, H.; Savage, Maureen L.; Shenoy, S.; Vacca, William D.; Cleve, Jeffrey E. Van; Wiedemann, Manuel; Wolf, J.

doi:10.1051/0004-6361/201730914

Cited by 6 publications

(9 citation statements)

References 88 publications

(95 reference statements)

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“…It has been shown that in theory SOFIA has some distinct advantages for extremely precise time-domain spectrophotometric observations at optical and IR wavelengths (Angerhausen 2010;Angerhausen et al 2010Angerhausen et al , 2014Angerhausen et al , 2017. SOFIA op-erates in important wavelength regions, where the planet's black-body temperature peaks and contrast ratios between the star and planet improve.…”

Section: Exoplanets With Sofiamentioning

confidence: 99%

“…and 3.05 µm 'water ice' bands -that are not observable from the ground. Again only parts of the full program were observed and are published in Angerhausen et al (2017) and summarized below.…”

Section: Accepted Proposals In Cycles 1-4mentioning

confidence: 99%

“…In Angerhausen et al (2015), the resulting light-curves were then fitted using the Transit Analysis Package (TAP) (Gazak et al 2012) which is built on EXOFAST (Eastman et al 2013). In Angerhausen et al (2017) they used the 'Transit Light Curve Modeller (TCLM)' code (Csizmadia et al 2011(Csizmadia et al , 2015 and the Bayesian model selection, and parameter estimation code EXONEST Placek et al (2014); Placek and Knuth (2015); Placek et al (2015). Their final results are summarized in the following section.…”

Section: Observational Parameters In the Airborne Environment Noise mentioning

confidence: 99%

“…The observation proposed in the joint US-German Cycle 2 GI program (USproposal: Angerhausen (2013) ; German-proposal: Dreyer (2013), see Table 1) was performed on SOFIAs flight number 149 on UT February 27, 2014. Angerhausen et al (2017) observed a transit of GJ 1214b using the photometry mode of FLITECAM and HIPO in the 'FLIPO' configuration. GJ 1214b was monitored during one 52 min transit plus ca.…”

Section: Gj 1214b With Flipo and Fpi+mentioning

confidence: 99%

“…The beginning of ingress and end of egress are marked in blue and red vertical lines. Adapted fromAngerhausen et al (2017)…”

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confidence: 99%

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Exoplanet Research with the Stratospheric Observatory for Infrared Astronomy (SOFIA)

Angerhausen

2018

Handbook of Exoplanets

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When the Stratospheric Observatory for Infrared Astronomy (SOFIA) was conceived and its first science cases defined, exoplanets had not been detected. Later studies, however, showed that optical and near-infrared (NIR) photometric and spectrophotometric follow-up observations during planetary transits and eclipses are feasible with SOFIA's instrumentation, in particular with the HIPO-FLITECAM and FPI+ optical and near-infrared instruments. Additionally, the airborne-based platform SOFIA has a number of unique advantages when compared to other groundand space-based observatories in this field of research. Here we will outline these theoretical advantages, present some sample science cases and the results of two observations from SOFIA's first five observation cycles -an observation of the Hot Jupiter HD 189733b with HIPO and an observation of the Super-Earth GJ 1214b with FLIPO and FPI+. Based on these early products available to this science case, we evaluate SOFIA's potential and future perspectives in the field of optical and infrared exoplanet spectrophotometry in the stratosphere.

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Section: Exoplanets With Sofiamentioning

confidence: 99%

Section: Accepted Proposals In Cycles 1-4mentioning

confidence: 99%

Section: Observational Parameters In the Airborne Environment Noise mentioning

confidence: 99%

Section: Gj 1214b With Flipo and Fpi+mentioning

confidence: 99%

“…The beginning of ingress and end of egress are marked in blue and red vertical lines. Adapted fromAngerhausen et al (2017)…”

mentioning

confidence: 99%

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Exoplanet Research with the Stratospheric Observatory for Infrared Astronomy (SOFIA)

Angerhausen

2018

Handbook of Exoplanets

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Ephemeris refinement of 21 hot Jupiter exoplanets with high timing uncertainties

Mallonn

Essen

Herrero

et al. 2019

A&A

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Transit events of extrasolar planets offer a wealth of information for planetary characterization. However, for many known targets, the uncertainty of their predicted transit windows prohibits an accurate scheduling of follow-up observations. In this work, we refine the ephemerides of 21 hot Jupiter exoplanets with the largest timing uncertainties. We collected 120 professional and amateur transit light curves of the targets of interest, observed with a range of telescopes of 0.3m to 2.2m, and analyzed them along with the timing information of the planets discovery papers. In the case of WASP-117b, we measured a timing deviation compared to the known ephemeris of about 3.5 hours, and for HAT-P-29b and HAT-P-31b the deviation amounted to about 2 hours and more. For all targets, the new ephemeris predicts transit timings with uncertainties of less than 6 minutes in the year 2018 and less than 13 minutes until 2025. Thus, our results allow for an accurate scheduling of follow-up observations in the next decade.

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The impact of faculae on the radius determination of exoplanets: the case of the M-star GJ 1214

Guenther

2022

Monthly Notices of the Royal Astronomical Society

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Precise measurements of exoplanets radii are of key importance for our understanding of the origin and nature of these objects. Measurement of the planet radii using the transit method have reached a precision that the effects of stellar surface features have to be taken into account. While the effects from spots have already been studied in detail, our knowledge of the effects caused by faculae is still limited. This is particularly the case for M-stars. Faculae can pose a problem if they are inhomogeneously distributed on the stellar surface. Using the eclipse mapping method, we study the distribution of the faculae on the surface of GJ 1214 using the Ca ii H&K lines as tracers. In order to assess the homogeneity of the distribution in a quantitative way, we introduce the inhomogeneity factor IHF. IHF is 0 per cent if the distribution is homogeneous, positive, if the plage regions are preferentially located along the path of the planet, and negative, if they are preferentially located outside the path of the planet. For GJ 1214, we derive a rather small value of $\rm IHF=7.7_{-7.7}^{+12.0}{{\ \rm per\ cent}}$. We discuss the relevance of this result in the context of the PLATO and ARIEL missions.

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Simultaneous multicolour optical and near-IR transit photometry of GJ 1214b with SOFIA

Cited by 6 publications

References 88 publications

Exoplanet Research with the Stratospheric Observatory for Infrared Astronomy (SOFIA)

Exoplanet Research with the Stratospheric Observatory for Infrared Astronomy (SOFIA)

Ephemeris refinement of 21 hot Jupiter exoplanets with high timing uncertainties

The impact of faculae on the radius determination of exoplanets: the case of the M-star GJ 1214

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