Questions tagged [exoplanet]
Questions regarding planets that lie outside the Solar System.
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What are the analysis steps in taking raw data from Kepler to a planetary system determination
I wish to get a concise list of the analysis steps required to take raw light data from a Kepler data set of a star through the steps needed to get to an analytical determination of the existence of a ...
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How to calculate the temperature of an exoplanet?
I was given an exoplanet similar in size and distance to host star to our own earth. It's orbiting a star with luminosity six times our sun, the greenhouse coefficient 0.3, bond albedo 0.3.
I would ...
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Could an ultra-hot Jupiter flare?
Some of the ultra-hot Jupiters (WASP-33b, KELT-9b) have dayside surface temperatures similar to low-mass stars. Would they be capable of producing flares? To be specific, I am asking about the ...
user24157
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Can primordial black holes be found orbiting other stars?
A recent study suggests a that a primordial black hole may be orbiting the sun at and that they can be common near other star systems.
What measurements and equipment can perhaps find BH's near ...
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What could successive double dips in the light-curve mean?
I was going through some analysis of the TESS light-curve data and I stumbled upon an interesting example (see below figures, where the blue line is simply a moving average), where the light-curve ...
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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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Radial velocity exoplanet search - can mathematical details be explained? (Bayesian periodogram MCMC)
Radial velocity (RV) is one of main methods for exoplanet search.
The popular description of the method sounds simple - one should measure periodic Doppler variation of a spectral line of a star and ...
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Where did the idea that tidally-locked planets have a big hurricane come from?
I've been noticing a bit of a trend in the depiction of tidally-locked habitable planets, where they are shown having a huge hurricane-like storm over the daylight hemisphere. Here's an example, and ...
user24157
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Just how resonant is the "resonant sextuplet of sub-Neptunes transiting the bright star HD 110067"?
The November 29, 2023 arXiv preprint A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067 constructs a resonant chain of orbital periods based on mean motion resonances (MMRs) and ...
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Mega Telescope using gravitational lensing and interferometry
I have been thinking about this crazy telescope idea, but I am not smart enough to understand if it's technically possible. I understand from an engineering and practical point of view it's a long way ...
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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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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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Precision of orbital period of exoplanets vs solar system planets (Extrasolar Planets Encyclopedia)
I noticed that the Extrasolar Planets Encyclopedia lists the orbital period of L 98-59 b in days to 7 decimal places. Can astronomers really measure orbital period of exoplanets to greater precision ...
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If all the Trappist-1 planets are tidally locked, which ones may have temperate zones?
Since all the Trappist-1 planets have circular orbits, it is entirely likely that all them are tidally locked.
If so, which ones of the planets may have temperate zones either on the bright or dark ...
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New method for exoplanet detection based on iridescence?
Could it be possible to detect exoplanets that have an abundance of iridescent minerals by analyzing their star's spectra over time as the angle in observation would lead to changes in absorbed ...
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Simulating oceans and ice sheets on other planets or moons?
From my friends in geosciences I learned a lot about General Circulation Models (GCMs) (for Earth's atmosphere and oceans). I also learned about ice sheet models for floating ice (like sea ice or ...
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Is it possible to build a ground-based telescope that can directly image Earth-like planets orbiting in the habitable zone of sunlike stars?
In the following discussion I will refer to Earth-like exoplanets planets orbiting in the habitable zone of sunlike stars simply as “Earth-like exoplanets."
NASA is currently developing or ...
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What maintains the high orbital eccentricity of many exo-planets near their sun?
Over the last decade we've discovered that many exoplanets not only have highly eccentric orbits, but also orbit very close to their sun. This is true of many classes of stars.
I definitely have a ...
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What have we ruled out as far as planets orbiting Gliese 710 goes?
My thoughts are that, if we are still around 1.3 million years from now, we might actually be able to send a mission there. Will the spectrometers of the 30 meter telescopes that are coming on line ...
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How is the extent of the rings of J1407b, a "Super Saturn," compatible with the Roche limit?
J1407 is a Sun-like star in Centaurus. Astronomers observed its exoplanet J1407b pass before it over several weeks and the details of the light curves indicate the exoplanet has over thirty rings, ...
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Are stagnant-lid Earth analogues guaranteed to become Venus-like?
In our current understanding of Venus, two things are generally accepted:
Venus reached its thermal tipping point at least 700 Ma. As the Sun's luminosity gradually increased with age, its average ...
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would the Solar Gravitational Lens Mission be looking at a specific exoplanet?
Quoting https://www.nasa.gov/directorates/spacetech/niac/2020_Phase_I_Phase_II/Direct_Multipixel_Imaging_and_Spectroscopy_of_an_Exoplanet/, the proposed Solar Gravitational Lens Mission would "...
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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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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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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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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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Would Atlas Pro's prediction about the color of plant in Kepler-186F work as a biosignature to search for life?
The Atlas Pro video that prompted this question is this.
Tl;dr: it is argued that due to the different spectrum of radiation emitted by Kepler-186 and what is known about the evolution of ...
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Why did Gemini Planet Imager hardly detect anything?
GPI was originally thought able to directly image tens of planets but so far has only discovered one new planet?
Why is this?
From Gemini Observatory; Adaptive optics
Source
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Using the 'exoplanet' module to fit a radial velocity curve for a binary star system
As part of a project, I am trying to fit a radial velocity curve using the tutorial for the binary star system (EBLM J0608-59) My code is quite similar to the tutorial, but as it is only one body ...
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Abundance of penitente ice formations in the solar system
When researching for my question on extraterresitral snow, I learned about a rare snow formation called penitente which seems to be found on various (dwarf) planets, like Earth, Mars, and Pluto. ...
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How do HabEx's internal coronagraph and external starshade work together and complement each other? What is it that each can do that the other can't?
Limits of space telescope? links to the video 4 Future Space Telescopes NASA wants to build and that page links to The New Great Observatories. These cover the four space-based instruments proposed by ...
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The electron–cyclotron maser emissions from Earth
The first-ever detection of radio signals caused by the electron–cyclotron maser mechanism outside of the Solar System, on Tau Bootis b was recently published (here). This phenomenon causes huge radio ...
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Help understanding why these two sub-Hill sphere moon stability limits are so different?
Comments under this answer to What orbital period would produce one New Moon (and one Full Moon) each year? What other effects would this produce? link to
Stable satellites around extrasolar giant ...
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Would the WISE Survey pick up a large planetary collisions like Theia-Earth? And from how far?
WISE or Wide-Field Infrared Survey Explorer
Large body collisions are obviously, very very rare, locally speaking, and with stars, often spiraling inwards not direct collisions. I know that stellar ...
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Could an Applegate-like mechanism operate in AM CVn systems?
One of the controversies surrounding the detection of exoplanets around post-common envelope binaries is the possibility that the orbital period variations observed might be the result of the ...
user24157
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Frequency of Earth type cores?
I've read many interesting threads concerning the composition of different planet cores in the solar system while trying to see if this question has already been asked. It appears as if Earth is ...
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Predicting Temperature Variation on Planets with High Eccentricity or Long Diurnal Periods
Whew! That title was a mouth-full, but accurate I hope. What I'm trying to figure out is a model for calculating the approximate temperature variation for a generally earth-like planet (similar ...
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Given a collection of pixels, how to deduce the flux from them?
I've obtained the coordinates of brightest pixels from different images (.fits files) using Python. I want to get the flux of each pixel. How do I go about finding out the flux?
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Question regarding potential moon sizes
I am planning out ideas for a science-fiction world, and I want to make sure that what I include is reasonable and mathematically sound (outside of things like FTL as that is neccessary for the story ...
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How common are there planets with significant share of oxygen in atmosphere?
Has been there detected any exoplanets with significant share of oxygen in atmosphere? What does the theory predict?
Superficially this looks like it should be fairly common: there is a lot of water ...
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How can I find or calculate ephemeris data for the planets in an extrasolar system, specifically Trappist-1?
The ultimate, perfect answer would be a link to someone's ephemeris file in SPICE kernel format. That's not a realistic hope.
Googling and gnawing, I've found orbital periods, eccentricities, and ...
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What do chthonian planets look like?
Obviously, a chthonian is going to be hot, but what colours could it have? What would the surface composition be? Would it keep patterns from the gas-bands it used to have, or would those have been ...
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Imaging an exoplanet via brightness over time
We can't directly image an exoplanet. Most of the time we detect planets by occlusion of the stars light. However, we occasionally can filter out the star's light and measure the light from the planet ...
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Can JWST see Proxima C?
I know that Proxima B is too close for Webb. But Proxima C is >1'' away from Proxima. So Webb could see it. There have been some unconfirmed images from earth. Besides there seem to be dust bands ...
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Software to create exoplanet transit lightcurves of all stars in a series of images?
There is quite a bit software out there that can be used for the transit method analysis of single stars, is there software that can do it for many simultaneously?
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Best resource for exoplanet statistics?
While the number of detected exoplanets is still low, is there a model that, considering the number and duration of made observations, and the fact that (non)detections depend on orbital plane ...
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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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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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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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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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