Habitable Exoplanet Observatory (HabEx) telescope and optical instruments

Martin, Stefan; Kuan, Gary M.; Stern, Daniel; Scowen, Paul A.; Krist, John; Mawet, Dimitri; Ruane, Garreth

doi:10.1117/12.2530737

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…IROV is expected to be some combination of The Large UV Optical Infrared Surveyor (LUVOIR) (The LUVOIR Team, 2019) with 8m diameter and HabEx (Martin et al, 2019) with a ∼4m diameter mirror, while including a coronagraph for direct imaging and spectroscopy of extrasolar planets. IROV would have a "light collecting area several times larger, 2-3 times sharper image quality, and instruments and detectors significantly more sensitive, providing 1-2 order-of-magnitude leaps in sensitivity and performance over HST."…”

Section: Future Space and Ground Based Exo-venus Observational Capabi...mentioning

confidence: 99%

Synergies between Venus & Exoplanetary Observations

Way

Ostberg

Foley

et al. 2022

Preprint

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In this chapter we examine how our knowledge of present day Venus can inform terrestrial exoplanetary science and how exoplanetary science can inform our study of Venus. In a superficial way the contrasts in knowledge appear stark. We have been looking at Venus for millennia and studying it via telescopic observations for centuries. Spacecraft observations began with Mariner 2 in 1962 when we confirmed that Venus was a hothouse planet, rather than the tropical paradise science fiction pictured. As long as our level of exploration and understanding of Venus remains far below that of Mars, major questions will endure. On the other hand, exoplanetary science has grown leaps and bounds since the discovery of Pegasus 51b in 1995, not too long after the golden years of Venus spacecraft missions came to an end with the Magellan Mission in 1994. Multi-million to billion dollar/euro exoplanet focused spacecraft missions such as JWST, ARIEL and their successors will be flown in the coming decades. At the same time, excitement about Venus exploration is blooming again with a number of confirmed and proposed missions in the coming decades from India, Russia, Japan, the European Space Agency (ESA) and the National Aeronautics and Space Administration (NASA). In this chapter, we review what is known and what we may discover tomorrow in complementary studies of Venus and its exoplanetary cousins.

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Section: Future Space and Ground Based Exo-venus Observational Capabi...mentioning

confidence: 99%

Synergies between Venus & Exoplanetary Observations

Way

Ostberg

Foley

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Spectroscopy at ultraviolet (UV), visible and near-infrared (NIR) wavelengths is key to atmospheric characterization of these planets, especially to measure abundances of biosignature gases such as O 2 , O 3 , CH 4 . Integral field spectrographs (IFS) were baselined for HabEx and LUVOIR, and were the choice for Roman-CGI until descoped (Stark et al 2014;Gong et al 2019;Martin et al 2019;The LUVOIR Team 2019;Gaudi et al 2020). By placing an lenslet array in the focal plane, an IFS can transfer the light at each individual location to prisms or gratings, which disperse the target photons into different detector pixels to retrieve the spectral content (Courtes 1982).…”

Section: Introductionmentioning

confidence: 99%

Direct Detection and Characterization of Exoplanets Using Imaging Fourier Transform Spectroscopy

Zhang 张,

Bottom,

Serabyn

2024

PASP

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Space-based direct imaging provides prospects for detection and spectral characterization of exoplanets at optical and near-infrared wavelengths. Integral field spectrographs (IFS) have been historically baselined for these mission concepts. However, multiple studies have revealed that detector noise is a serious obstacle for such instruments when observing extremely faint targets such as Earth-like planets. Imaging Fourier transform spectrographs (iFTS) are generally less sensitive to detector noise, and have several other compelling features such as simultaneous imaging and spectroscopy, smaller-format detector requirements, and variable spectral resolving power. To date, they have not been studied as options for such missions. Here, we compare the capabilities of IFS and iFTS for directly obtaining spectra from an Earth-like planet using both analytic and numerical models. Specifically, we compare the required exposure times to achieve the same signal-to-noise ratio with the two architectures over a range of detector and optical system parameters. We find that for a 6 m telescope, an IFS outperforms an iFTS at optical wavelengths due to the effects of distributed photon noise. In the near-IR, the relative efficiency of an IFS and iFTS depends critically on the instrument design and detector noise. An iFTS will be more efficient than an IFS if the readout noise of the near-IR detector is above ∼2–3 e− pix−1 frame−1 (t frm = 1000 s), which correspond to half to one-third of the state-of-art detector noise. However, if the readout noise is reduced below this threshold, the performance of an IFS will experience a substantial improvement and become more efficient. These results motivate consideration of an iFTS as an alternative option for future direct imaging space missions in the near-IR.

show abstract

Synergies Between Venus & Exoplanetary Observations

et al. 2023

View full text Add to dashboard Cite

Here we examine how our knowledge of present day Venus can inform terrestrial exoplanetary science and how exoplanetary science can inform our study of Venus. In a superficial way the contrasts in knowledge appear stark. We have been looking at Venus for millennia and studying it via telescopic observations for centuries. Spacecraft observations began with Mariner 2 in 1962 when we confirmed that Venus was a hothouse planet, rather than the tropical paradise science fiction pictured. As long as our level of exploration and understanding of Venus remains far below that of Mars, major questions will endure. On the other hand, exoplanetary science has grown leaps and bounds since the discovery of Pegasus 51b in 1995, not too long after the golden years of Venus spacecraft missions came to an end with the Magellan Mission in 1994. Multi-million to billion dollar/euro exoplanet focused spacecraft missions such as JWST, and its successors will be flown in the coming decades. At the same time, excitement about Venus exploration is blooming again with a number of confirmed and proposed missions in the coming decades from India, Russia, Japan, the European Space Agency (ESA) and the National Aeronautics and Space Administration (NASA). Here we review what is known and what we may discover tomorrow in complementary studies of Venus and its exoplanetary cousins.

show abstract

Habitable Exoplanet Observatory (HabEx) telescope and optical instruments

Cited by 4 publications

References 9 publications

Synergies between Venus & Exoplanetary Observations

Synergies between Venus & Exoplanetary Observations

Direct Detection and Characterization of Exoplanets Using Imaging Fourier Transform Spectroscopy

Synergies Between Venus & Exoplanetary Observations

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