Questions tagged [exoplanet]
Questions regarding planets that lie outside the Solar System.
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Provided a relative flux v/s wavelength plot, how can I calculate the radial velocity of an exoplanet? [closed]
I imagine the relativistic version of the Doppler effect would be appropriate but I'm not entirely sure since flux is a measure of intensity. Alternatively, where could I find redshift data for ...
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Determining period of an exoplanet using radial velocity data
I've spent an incredibly large amount of time trying to wrap my head around how the period is computed using just solely the raw data for the radial velocity. I've tried my hand with some nonlinear ...
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What data has JWST obtained of the Trappist-1 exoplanets and where is it? [duplicate]
I have been long waiting spectral data regarding the exoplanets around Trappist-1 and their atmospheres, and I was also long awaiting JWST's launch to get to know more about the system. However, now ...
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How would a person know if a planet is orbiting a binary star?
I read in Neil deGrasse Tyson's book Astrophysics for People in a Hurry that scientists can tell if a star has a planet orbiting it because the light appears to shake.
So if in the case of a binary ...
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What Simple and Multiple Linear and Logistic Regressions Would Be Valuable for a Celestial Mechanical Data Set for Exoplanets with Density?
I have created a celestial mechanical data set for exoplanets with density values (https://github.com/tslever/Tom_Levers_Git_Repository/blob/main/UVA/2--Linear_Models_For_Data_Science/Project_2/...
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Where can I find datasets for all confirmed exoplanets, terrestrial exoplanets, and Super-Earth exoplanets?
The NASA Exoplanet Archive has a Planetary Systems dataset offers celestial mechanical data for 5,197 confirmed exoplanets. The Exoplanets Catalog classifies these exoplanets as terrestrial, super-...
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What is the mass of exoplanet HD 100546b?
What is HD 100546b's real mass?
In Wikipedia I found that its mass is 3.1 Jupiter's masses but at Nasa official site I found that it was 752 Jupiter masses, which sounds unbelievable.
And on the ...
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Do these results mean that I have found this exoplanet?
Yesterday I was going through the TESS mission data on mast portal and after applying some filters I found some data. I started analyzing that data using the lightkurve library.
plot without using the ...
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How are planets detected from the pull their gravity exerts on their parent stars?
"The planets we have so far discovered orbiting other stars were found from the pull their gravity exerts on their
parent stars, or from the light they block from their stars when they pass in ...
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How to know if an exoplanet is terrestrial?
NASA exoplanet archive, open exoplanet catalog and exoplanet.eu are some of the most famous catalog of exoplanet discovered by all techniques. However, all of these catalogs are missing the ...
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If Ganymede had a thick, Earth-like atmosphere, would the surface be protected from Jupiter's intense radiation?
Obviously, this is a totally hypothetical, alternate version of Ganymede, since it would also need to have more mass and a stronger intrinsic magnetic field to hold onto a substantial atmosphere. But ...
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Which of the exoplanets are having retrograde rotation?
By exoplanet, I mean planets outside of our solar system(i.e., planets in other solar systems). If we talk about our solar system, then Venus, Uranus, and Pluto have retrograde rotation. Most of the ...
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Fourier analysis of exoplanet transit to determine the number of planets in the system
Although I think that this can be done by simply looking at the transit graph, I was wondering if a Fourier transform of a transit (basically transforming transit depth/amplitude vs time graph to ...
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Why use a large separate starshade instead of an occulting disk?
The New Worlds Mission proposal has a large occulter on a different spacecraft from the space telescope to block glare from a star to reveal its planets. What is its advantage compared to a disk on an ...
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If you were standing on a habitable moon of a gas giant, what would the planet look like during the day vs the night? [closed]
If you were standing on the proplanetary side of a habitable moon of a gas giant, and the moon had a thick enough atmosphere to make the sky blue, how would the gas giant look during the day? Would it ...
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easy curve modeling package for transits that fits the data not just the parameters?
Does anyone have any recommendations for easy-to-use exoplanet transit light curve model fitting packages like batman, but that fits the data, not just the model parameters?
Thank you so much. I need ...
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How to obtain exoplanets transmission spectra from JWST's NIRISS data of WASP96?
I was having a look at JWST's NIRISS data of WASP96 (specifically at the x1dints fits file which should be already calibrated). From this, I would like to obtain a result in a fashion similar to the ...
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Is the Michael H. Hart range for the Habitable Zone (Goldlocks Zone) still used?
We're having an argument on another site about the Hart definition of the CHZ. In 1979, Hart provided a very conservative estimate of habitable zone: 0.958 - 1.004 AU. This was used to substantiate ...
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Could we make ourselves detectable for aliens with JWST-like technology?
The James Webb Space Telescope is going to take spectra from planets during transit in front of their central star. By that, spectral changes can identify if the planet possesses an atmosphere and ...
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How it is not possible to say if Titius–Bode law is a "coincidence" or not?
From Wikipedia:
No solid theoretical explanation underlies the Titius–Bode law – but it is possible that, given a combination of orbital resonance and shortage of degrees of freedom, any stable ...
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What's the difference between an exoplanetary transit and eclipse? [duplicate]
This article states
Their data contained eclipses for all 25 exoplanets, and transits for 17 of them.
This page from NASA explains the difference between an eclipse and a transit:
Like an eclipse, ...
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Why do we estimate the Minimum mass when we are dealing with exoplanets?
While solving astronomy problems dealing with exoplanets, I always see that the question asks for minimum mass instead of the mass. Why is that so and why is the calculated mass minimum mass?
example ...
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Best way to quantify the tidal stress on an exoplanet?
I'm trying to assess the tidal stresses different exoplanets experience during their orbits. The known parameters are usually mass $M$, radius $R$, eccentricity $e$, orbital period $T$, and semi-major ...
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Is an extreme precession on a tidally locked planet possible?
Let's assume an exoplanet orbits a red dwarf star closely enough that is tidally locked to it. Is it possible for the planet to have a significant axial precession? If not naturally, is it possible to ...
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Data base of exoplanets with common names to use beside Nasa Exoplanet Archive
For a project I am working on, I use data from the NASA Exoplanet Archive at
https://exoplanetarchive.ipac.caltech.edu/TAP/sync?query=select+*+from+ps&format=json
I take this json data down and ...
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Astrophysics Ph.D. thesis on intergalactic rogue planets and their habitability; how active is this field of research?
Is the habitability of intergalactic rogue planets something that has been studied a lot?
The reason that I'm asking is that I've just started my PhD program last year and I'm wondering/concerned if ...
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Is one transit enough to be confident that we detected an exoplanet
Everything is pretty much in the title. I was thinking about the transit method and was wondering if the signature of a transit on the light curve of a star is distinctive enough to only need one ...
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What is the densest known exoplanet?
55 Cancri e is said to be 60 percent larger in diameter than Earth but have 8 times, the mass, making it twice as dense as Earth, and almost as dense as lead.
https://www.space.com/11544-densest-alien-...
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Accurate formula for calculating the mass of an exoplanet using the transit method
A friend and I did some work on exoplanets with the help of a research institute (IEEC in Spain) for a major high school project. What we did was to "redetect" the exoplanet XO-6b through ...
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Can we use atmospheric retrieval techniques on stars?
Although there are lots of examples of atmospheric retrieval techniques being used on exoplanets, and recently brown dwarfs, I can't find any mention of atmospheric retrieval techniques being used on ...
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What does "RV model including a GP with a quasi-periodic covariance structure" mean?
A candidate short-period sub-Earth orbiting Proxima Centauri says:
4.1 Simple periodogram analysis
]We first consider a very simple pre-whitening procedure applied to the CCF RVs in order to ...
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Contradictory errors in python package VESPA
VESPA is a python package that can calculate the False Positive Probability for Exoplanets. Here is the link to the repository
https://pypi.org/project/VESPA/
https://github.com/timothydmorton/VESPA
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What is a Keplerian shear
I was reading an article on Gas Giants and how some form close to their host star.
One line in the article says:
A region of the proto-planetary disk will be susceptible to gravitational
instability ...
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How massive can a carbon planet be?
A carbon planet is a theoretical type of planet with more carbon than oxygen. How massive can a carbon planet be? Could you have a neptune-like planet except with all the water replaced with ...
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The reason for an exoplanet density increase of planets closer to a star
From the NASA exoplanet archive system it can be seen that in the range of $0.02-0.06~\text{AU}$ distance an exoplanet is to its star, as distance drops down, the planet density increases linearly:
A ...
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Probability of transit of an exoplanet in front of its star
I'm trying to calculate the probability of transit of an exoplanet in orbit around a star of diameter $d$, at a distance of $4d$ from its centre. Here's what I did:
In this figure, we are only ...
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Power law of object mass in Milky way
Red dwarfs are more common than larger stars. Does this trend continue to smaller objects? If you take every "condensed object" from dust grains through asteroids, planets, and stars in the ...
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Infrared ozone line detection
I was recently reading Jack R. Woods' response on this forum: Could the James Webb Space Telescope detect biosignals on exoplanets?
In an ideal situation (say looking at absorption lines of a
super-...
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Would a planet orbiting black hole be detectable?
Usually missions like Kepler are finding exoplanets orbiting (the barycenter of systems related to...) stars at distances that are not common if compared with the Solar System. This finding (as I ...
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Can we measure planetary Love number of exoplanets?
I understand that Love number is the ratio between the tide raising potential to the actual deformation of the body, however, I'm not sure if there are ways to detect the Love number from observations ...
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Can distribution of stars / planets formation be a long-tailed one?
We know that peak of star formation already passed
10.1146/annurev-astro-032620-021910
and it looks like peak of planet formation occurred slightly after formation of Earth
10.1017/S1473550415000208
...
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Is the closest planet to another planet always the innermost planet?
In our Solar system Mercury is not only the closest planet to Earth on average but also, for the same reason, the closest planet on average to all other planets (Jupiter, Neptune, etc...).
Does that ...
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What is sin i in this graph and why is it there?
This is some data presented in a lecture on exoplanets that depicts the distribution of the sizes of super-Earths in comparison to the mass of Jupiter. I would like to know what the argument of the ...
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Which studies prior to 2018 "claimed to find evidence of extragalactic planets in the Andromeda galaxy"? Which instrument was used?
After the first round of popular news items about the "first extragalactic exoplanet" discovery, CNET's Did astronomers find the first planet outside of the Milky Way? It's complicated ...
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Which University of Oklahoma research purported to "detect thousands of extragalactic planets back in 2018"? Which instrument was used?
After the first round of popular news items about the "first extragalactic exoplanet" discovery, CNET's Did astronomers find the first planet outside of the Milky Way? It's complicated ...
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Is there any planet bigger than a star?
Or a star smaller than a planet?
Which star and planet would be an example of this?
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After only one eclipse of its X-ray bright primary, how can astronomers estimate the first extragalactic exoplanet's period to be about 70 years?
Phys.org's Astronomers may have discovered the first planet outside of our galaxy links to Di Stefano et al. 2021 A possible planet candidate in an external galaxy detected through X-ray transit (...
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Was the First Extragalactic Planet discovered in Andromeda Galaxy
In the news today, they announce a first possible planet outside the Milky Way galaxy has been spotted, in the Whirpool Galaxy. https://www.bbc.co.uk/news/science-environment-59044650
Surely the ...
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How often does the configuration of the Trappist-1 system repeat
My question is simply how long it takes for the 7 known planets in Trappist-1 to be in the same configuration in relation to their host star, and to each-other. Those seven planets are in a 2:3:4:6:9:...
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What are opinions of most planetary scientists on this study (link below), were there already some complex reviews in scientific journals?
I remember this two year old article from Universe Today about this study, "Stepwise Earth oxygenation is an inherent property of global biogeochemical cycling", by Lewis J. Alcott, Benjamin ...
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