# Encrenaz 2020: A stringent upper limit of the PH3 abundance at the cloud top of Venus

> T. Encrenaz, T. K. Greathouse, E. Marcq et al., 2020. 5 records on Mysteries Department cite it. An infrared upper limit at and above the cloud tops.

Source: https://mysteriesdept.com/sources/SRC0CQY1J645WRC/a-stringent-upper-limit-of-the-ph3-abundance-at-the-cloud  
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[Sources](https://mysteriesdept.com/sources)[Phosphine in the clouds of Venus](https://mysteriesdept.com/mysteries/venus-phosphine)Encrenaz 2020

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# A stringent upper limit of the PH3 abundance at the cloud top of Venus

T. Encrenaz, T. K. Greathouse, E. Marcq et al., 2020. _Astronomy & Astrophysics 643, L5_.

TEXES spectra from the NASA Infrared Telescope Facility, March 2015, near 950 cm⁻¹: no phosphine feature, a 3-sigma disk-integrated upper limit of 5 ppbv, four times below the millimetre value.

**Phosphine in the clouds of Venus** ArticleCopy of **[IRTF/TEXES infrared spectra of Venus, March 2015](https://mysteriesdept.com/mysteries/venus-phosphine/artifacts/ART0CQY28582797/irtf-texes-infrared-spectra-of-venus-march-2015)** doi: **[10.1051/0004-6361/202039559](https://doi.org/10.1051/0004-6361/202039559)** Checked against the original0

## What it's used for here

An infrared upper limit at and above the cloud tops.

## Cited by on this site 5 records

[IRTF/TEXES infrared spectra of Venus, March 2015](https://mysteriesdept.com/mysteries/venus-phosphine/artifacts/ART0CQY28582797/irtf-texes-infrared-spectra-of-venus-march-2015)

ART

[IRTF/TEXES infrared spectra of Venus, March 2015: document](https://mysteriesdept.com/mysteries/venus-phosphine/copies/CPY0CQY28D20SGF/irtf-texes-infrared-spectra-of-venus-march-2015-document)

CPY

[IRTF/TEXES infrared spectra give a 3-sigma limit of 5 ppbv near the cloud tops.](https://mysteriesdept.com/mysteries/venus-phosphine/evidence/EVD0CQY203E64PW/irtf-texes-infrared-spectra-give-a-3-sigma-limit-of-5-ppbv)

Evidence

EVD

[Phosphine in the clouds of Venus](https://mysteriesdept.com/mysteries/venus-phosphine)

The mystery article

MYS

[Can the claimed phosphine be reconciled with the upper limits from other instruments?](https://mysteriesdept.com/mysteries/venus-phosphine/questions/QST0CQY1TZC4EZE/can-the-claimed-phosphine-be-reconciled-with-the-upper)

Question

QST

## Cite it

```
Encrenaz, T., Greathouse, T. K., Marcq, E., Widemann, T., Bézard, B., & et al. (2020). A stringent upper limit of the PH3 abundance at the cloud top of Venus. Astronomy & Astrophysics 643, L5. https://doi.org/10.1051/0004-6361/202039559
```

[Read it free at doi.org](https://doi.org/10.1051/0004-6361/202039559)

Key

**SRC** 0CQY1J645WRC

Kind

Journal article

Rights

CC-BY-4.0

Checked

Against the published article

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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