Show simple item record

dc.contributor.authorDuffy, CDP
dc.contributor.authorCanchon, G
dc.contributor.authorHaworth, TJ
dc.contributor.authorGillen, E
dc.contributor.authorChitnavis, S
dc.contributor.authorMullineaux, CW
dc.date.accessioned2023-11-03T09:53:33Z
dc.date.available2023-11-03T09:53:33Z
dc.date.issued2023
dc.identifier.issn0035-8711
dc.identifier.urihttps://qmro.qmul.ac.uk/xmlui/handle/123456789/91643
dc.description.abstractHere, we discuss the feasibility of photosynthesis on Earth-like rocky planets in close orbit around ultracool red dwarf stars. Stars of this type have very limited emission in the photosynthetically active region of the spectrum (400–700 nm), suggesting that they may not be able to support oxygenic photosynthesis. However, photoautotrophs on Earth frequently exploit very dim environments with the aid of highly structured and extremely efficient antenna systems. Moreover, the anoxygenic photosynthetic bacteria, which do not need to oxidize water to source electrons, can exploit far-red and near-infrared light. Here, we apply a simple model of a photosynthetic antenna to a range of model stellar spectra, ranging from ultracool (2300 K) to Sun-like (5800 K). We assume that a photosynthetic organism will evolve an antenna that maximizes the rate of energy input while also minimizing fluctuations. The latter is the noise cancelling principle recently reported by Arp et al. Applied to the solar spectrum, this predicts optimal antenna configurations in agreement with the chlorophyll Soret absorption bands. Applied to cooler stars, the optimal antenna peaks become redder with decreasing stellar temperature, crossing to the typical wavelength ranges associated with anoxygenic photoautotrophs at ∼3300 K. Lastly, we compare the relative input power delivered by antennae of equivalent size around different stars and find that the predicted variation is within the same order of magnitude. We conclude that low-mass stars do not automatically present light-limiting conditions for photosynthesis, but they may select for anoxygenic organisms.en_US
dc.format.extentstad2823 - ?
dc.publisherOxford University Press (OUP)en_US
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsThis is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.subject7 Affordable and Clean Energyen_US
dc.titlePhotosynthesis Under a Red Sun: Predicting the absorption characteristics of an extraterrestrial light-harvesting antennaen_US
dc.typeArticleen_US
dc.rights.holder© 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society
dc.identifier.doi10.1093/mnras/stad2823
pubs.notesNot knownen_US
rioxxterms.funderDefault funderen_US
rioxxterms.identifier.projectDefault projecten_US


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.