F Type Stars - The Bridge Between Brilliance and Mystery

Hi and Welcome to our blog, Where we discuss astronomical objects and structures in easy and understandable yet informative words. In today's post, we are going to talk about F-type stars, which are intermediate mass stars. We will tell you some amazing facts that you can hardly find on the internet.

Let's Begin.

F-type star glowing amidst a multicolored nebula, with scattered background stars enhancing the cosmic depth.

Introduction

First off, Let's know what F stars are, Well, this is basically a group assigned to specific types of stars that are 1.04 to 1.4 times more massive than our sun, 1.15 - 1.4 times larger in radius and 1.5 to 5 times more luminous than the sun. As well as 7500-6000 K hot and they glow in yellowish-white. These stars are well populated in our local space and galaxy, they live 2 - 4 billion years. This timescale is enough for planetary formation hence we find several Planets around them. Their Ultraviolet radiation is a little bit stronger than the sun, on their planet, so it's possible to develop a life form if they meet all optimal conditions. Even though they have a significant number of stars most of them are not bright enough to be visible to the naked eye.

Let's see their some more variants:

Main Sequence (V):

A fun fact showing some F type stars can burn 15 Billion kg fuel per second in their core

After the protostar phase, When a star fuses Hydrogen and makes Helium, we say the star is in the Main sequence phase, in this phase Star is mostly productive and well-balanced by Gravity and nuclear force, so it is the longest period in a star's life. Since F type Stars burn their fuel at a higher rate than our sun their lifespan will indeed be shorter. For example, a Common F5V Star will burn 15 Billion Kilograms of fuel each second in its core while Our sun only 4 Billion Kgs per second. you can look at picture for some examples and their properties.

F-type main sequence stars comparison—spectral types, masses, radii, temperatures, and luminosities in a compact table.

Sub giant (IV):

Star fuse Hydrogen and create helium, which is inactive or degenerate. However, Inactive doesn't mean they are totally useless for the star but they are less important as fuel that's why we use the word inactive or degenerate.So, Hydrogen is about to exhaust and helium is increasing, so gravity is also becoming powerful in the core and the envelope or outer layers of the star will expand. it will increase their temperature (of the core) and luminosity. it will keep growing until it becomes a red giant due to temperature loss. So Here are some expanding Stars which is denoted by IV in their spectra:

F-type sub giant stars comparison—spectrum, mass, radius, temperature, volume, and luminosity in a structured table.

Giant (III):

In the last sub-section, we said they become red giant but here we see White balls, because when a massive star loses temperature due to expansion. it becomes Blue to white Therefore, we still have white stars in the picture. we talking about Whitish-yellow stars so it is a perfect group to keep them. The white main sequence stars will become Red giants it may remain white if it doesn't lose temperature but it rarely happens That's why we'll talk about those red giants in M Class Stars. Common Giants fuse helium and create Carbon and oxygen when they meet appropriate conditions You can look at this picture some of them have higher mass and size etc. than whole F type stars because they were powerful stars which have come to this place in the course of their lives.

F-type giant stars—comparison of spectral types, masses, radii, temperatures, volumes, and luminosities in a structured table.

Bright Giant (II):

These are again evolved from other than F-class and due to evolution they are leaving the giant phase and going towards the Supergiant phase but it will take some thousand years, in this stage, their luminosity and radius will increase more than the Giant group. So we can say this is a transitional phase. you can look at this picture.

F-type bright giants—stellar attributes mapped across spectral classification, size, heat intensity, and radiance.

Supergiant (I):

These stars were super giants since birth, They evolved and became White Supergiants. As well as they have multiple shell-burning layers. Also they are end of their lives because Massive stars don't last so long as compared to other smaller stars. If they have more than 8-10 Solar masses they will become supernova and the core turns into neutron stars.

F-type white supergiants—colossal stars mapped by spectral class, mass, heat intensity, and radiant power.

Image showing WTF (Where's the Flux) Star had some luminosity irrergularities which led to several confusions

Cultural Importance:

Let's look at some stars that have some kind of cultural or historical importance.

Polaris (α ursae minoris):

This star has been appearing near the northern rotation axis of the Earth for many thousands of years. It is a well known star in the entire world, it was a significant star for travelers and navigators before the GPS. It has a reach importance in cultures too.

Procyon (α canis minoris):

This star's name means "before the dog" in the Greek language. In mythology, it follows Sirius the Dogstar due to the earth's rotation.

Cor Caroli ( α canum venaticorum):

This star was unnamed until the 17 century, Cor Caroli means the heart of Charles. Named after his majesty of England.

F-type stars—first powerful stellar class capable of supporting life, blending energy and habitability.

Habitat and human life:

Image explaining when Charles II returned to England, that night This star was abnormally bright.

There is little possibility of Biology, due to its strong but moderate UV and large habitable zone. The minimum and maximum distance from the star for a planet, where Water can normally be found in liquid form is called the habitable zone or Goldilock zone. in this zone, when all the other conditions are met for human life are called Habitable planets. Its planets must have stronger magnetic fields and robust Ozone layers than the Earth. So If we think we have found a planet the same as the Earth along with all connections and interactions with planets in our solar system first. However, there are some Star systems that are being considered habitable by scientists, let's know them.

38 Virginis b of 38 Vir:

This planet orbits an F6 V Star, which is a gas giant like Jupiter and it completes an orbit in around 2 years or 825 days. this planet receives the same amount of light as our Earth Does. But we can't live in such a gas giant but how about living on one of its moon or many moons? some studies show it can have a moon system like our Gas giant planets.

Rocky moon under an F-type star—hazy terrain with a colossal gas giant looming in the sky, its faint atmospheric bands hinting at dynamic weather.

KOI 4878.01 of KOI- 4878:

This planet is not a gas giant but a rocky planet, it shares tremendous similarities with the Earth. This planet orbits its star from 168 Million kilometers within around 449 days whereas our earth has a distance from the sun of about 150 Million Kilometers and an average period of 365 days. it is also slightly larger than our Earth. Due to its distance from the star and orbital period, it is considered a habitable planet. it also has more greenhouse gases and can capture more heat.

Rocky exoplanet under an intense F-type star—scorching sunlight, rugged terrain, and an arid, reddish-brown landscape with deep ridges and valleys.

In the End.

Cor Caroli—its name honored kings and even a US Navy ship during World War II, blending royal and military history.

That's all for today, We hope you enjoyed our post while reading. If you wanna read such content then Follow our Blog and share our posts on social media. Thanks for Finding this post.
Have a nice day.

Emojis are Designed by Freepik