PMID- 30482276
OWN - NLM
STAT- MEDLINE
DCOM- 20190123
LR  - 20190123
IS  - 2214-5532 (Electronic)
IS  - 2214-5524 (Linking)
VI  - 19
DP  - 2018 Nov
TI  - Tardigrade indexing approach on exoplanets.
PG  - 13-16
LID - S2214-5524(18)30041-5 [pii]
LID - 10.1016/j.lssr.2018.08.001 [doi]
AB  - Finding life on other worlds is a fascinating area of astrobiology and planetary 
      sciences. Presently, over 3800 exoplanets, representing a very wide range of 
      physical and chemical environments, are known. Scientists are not only looking 
      for traces of life outside Earth, but they are also trying to find out which of 
      Earth's known organisms (ex: tardigrades (water bears)) would be able to survive 
      on other planets. In our study, we have established a metric tool for 
      distinguishing the potential survivability of active and cryptobiotic tardigrades 
      on rocky-water and water-gas planets in our solar system and exoplanets, taking 
      into consideration the geometrical means of six physical parameters such as 
      radius, density, escape velocity, revolution period, surface temperature, and 
      surface pressure of the considered planets. More than 3800 exoplanets are 
      available as the main sample from Planetary Habitable Laboratory - Exoplanet 
      Catalog (PHL-EC), from which we have chosen 57 exoplanets in our study including 
      Earth and Mars, with water composition as reference. The Active Tardigrade Index 
      (ATI) and Cryptobiotic Tardigrade Index (CTI) are two metric indices with minimum 
      value 0 (= tardigrades cannot survive) and maximum 1 (= tardigrades will survive 
      in their respective state). Values between 0 and 1 indicate a percentage chance 
      of the active or cryptobiotic tardigrades surviving on a given exoplanet. Among 
      known planets some of the exoplanets are tabulated as ATI and CTI indices for 
      sample representation like: Kepler-100d, Kepler-48d, Kepler-289b, TRAPPIST-1 f 
      and Kepler-106e. The results with Mars as the threshold indicates that Mars could 
      be the only rock-water composition planet that could be more suitable for 
      tardigrades than other considered exoplanets.
CI  - Copyright (c) 2018. Published by Elsevier Ltd.
FAU - Jagadeesh, Madhu Kashyap
AU  - Jagadeesh MK
AD  - Department of Physics, Jyoti Nivas College, Bengaluru, Karnataka 560095, India. 
      Electronic address: kas7890.astro@gmail.com.
FAU - Roszkowska, Milena
AU  - Roszkowska M
AD  - Department of Animal Taxonomy and Ecology, Faculty of Biology, Adam Mickiewicz 
      University, Poznan, Umultowska 89, Poznan 61-614, Poland; Department of 
      Bioenergetics, Faculty of Biology, Adam Mickiewicz University, Poznan, Umultowska 
      89, Poznan 61-614, Poland. Electronic address: mil.roszkowska@gmail.com.
FAU - Kaczmarek, Lukasz
AU  - Kaczmarek L
AD  - Department of Animal Taxonomy and Ecology, Faculty of Biology, Adam Mickiewicz 
      University, Poznan, Umultowska 89, Poznan 61-614, Poland. Electronic address: 
      kaczmar@amu.edu.pl.
LA  - eng
PT  - Journal Article
DEP - 20180808
PL  - Netherlands
TA  - Life Sci Space Res (Amst)
JT  - Life sciences in space research
JID - 101632373
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - Animals
MH  - Exobiology/*methods
MH  - *Extraterrestrial Environment
MH  - *Planets
MH  - *Solar System
MH  - *Tardigrada
MH  - Temperature
MH  - Water
EDAT- 2018/11/30 06:00
MHDA- 2019/01/24 06:00
CRDT- 2018/11/29 06:00
PHST- 2018/05/01 00:00 [received]
PHST- 2018/08/03 00:00 [revised]
PHST- 2018/08/06 00:00 [accepted]
PHST- 2018/11/29 06:00 [entrez]
PHST- 2018/11/30 06:00 [pubmed]
PHST- 2019/01/24 06:00 [medline]
AID - S2214-5524(18)30041-5 [pii]
AID - 10.1016/j.lssr.2018.08.001 [doi]
PST - ppublish
SO  - Life Sci Space Res (Amst). 2018 Nov;19:13-16. doi: 10.1016/j.lssr.2018.08.001. 
      Epub 2018 Aug 8.