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Questions tagged [nova]

For questions about stellar explosions on white dwarfs caused by runaway fusion reactions in an accreted hydrogen atmoshphere and visible as a "new star". Distinct from a supernova.

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4 votes
1 answer
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Can a Nova occur outside of a binary star system?

With the T Coronae Borealis nova likely to erupt soon, it got me thinking if novas could occur outside of a binary star system. On the wiki page titled Nova: All observed novae involve white dwarfs ...
Shawn Lim's user avatar
  • 385
2 votes
1 answer
60 views

Tracking variable stars?

Is there a website or application I can use do track the brightness of variable stars and notify of any unusual or particularly spectacular changes. I am particularly interested in tracking the blaze ...
Harrychink's user avatar
3 votes
1 answer
256 views

Automated (and hopefully free) systems I can subscribe to sending email or SMS text message when the T Coronae Borealis Nova becomes visible?

My earlier question about predicted potentially observable events Has a gravitational microlensing event ever been predicted? If so, has it been observed? is limited to microlensing. Now I have just ...
uhoh's user avatar
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6 votes
1 answer
100 views

Why does a white dwarf sometimes go 'nova' and sometimes supernova (type 1a)?

Obviously, when a white dwarf goes truly supernova, there is nothing left, not even, I have heard, a neutron star or black hole... But when certain white dwarf stars accrete certain amounts or types ...
Kurt Hikes's user avatar
  • 5,097
3 votes
1 answer
91 views

Has the rate of time passage been measured?

We know certain astronomical events in our neighborhood occur within a specific time interval,for example a solar flare, a nova, etc. Does the time interval of these 'standard metronomes' change if ...
aquagremlin's user avatar
2 votes
2 answers
58 views

How can photoionization release photons? As in the coronal emission of a nova star?

The photoionization process absorbs energy (light), it doesn't release it.... So how can some astrophysicists say that photoionization releases the light responsible for the coronal emission of a star ...
Kurt Hikes's user avatar
  • 5,097
4 votes
1 answer
73 views

How much time do I have left to easily spot the recently brightened Recurrent Nova RS Ophiuchi with binoculars and mild light pollution?

Excellent answers to Binocular-friendly star map to find the Recurrent Nova RS Ophiuchi? provide some helpful maps for circa 8° FOV binoculars, but due to spatial and potential meteorological ...
uhoh's user avatar
  • 30.7k
2 votes
3 answers
94 views

Binocular-friendly star map to find the Recurrent Nova RS Ophiuchi?

I'd like to find or generate a map that will be useful for someone with an 8° FOV pair of binoculars to locate the Recurrent Nova RS Ophiuchi. As linked in The Observatory Science alert's Epic Nova ...
uhoh's user avatar
  • 30.7k
5 votes
1 answer
2k views

Difference between Supernova Type Ia and Nova

What is the difference between Supernova Type Ia and Nova? Base on a web search, they seem to have a similar formation process, as they are both white dwarfs in a binary system who absorb masses from ...
Jack the Ranger's user avatar
0 votes
0 answers
136 views

Distance and absolute brightness

This is an exercise from a text, I’m learning from and I can’t understand it so I’m asking just to develop my knowledge: The explosion of V603 Aql (Nova Aquilae) took place in June 1918. The nova ...
Paulina Góra's user avatar
6 votes
1 answer
263 views

Assuming no light pollution, was "2C. 1406" ever visible to the naked eye?

Joseph Needham, in his Science and Civilisation in China Vol. III, claimed that there was an ancient record of a nova about three thousand years ago. As a result of private correspondences with a "Dr ...
dROOOze's user avatar
  • 163
1 vote
0 answers
77 views

Does Nickel show up in spectra of Nova?

Does a nova, not a supernova, get hot enough that nickel is produced despite its formation by fusion being an endothermic reaction? If nickel is made, does it make it out of the star into the nebula? ...
Wayfaring Stranger's user avatar
1 vote
0 answers
43 views

How to decide which part of the data is analyzed? [closed]

I need to get the X-ray light curve of Classical Nova V1494 Aquilae (1999 No. 2) in Outburst. It is done long time ago, but I need to this by myself. While reading the papaer about the V1494 Aquilae, ...
4pie0's user avatar
  • 11
29 votes
2 answers
3k views

We know what a nova is, but how?

I work with astrophysicists and require some basic knowledge of many astronomical sources, however research priorities often demand that most of human knowledge on a subject be taken for granted. I ...
Sam's user avatar
  • 489
1 vote
1 answer
148 views

Identifying cataclysmic stellar phenomena

Cataclysms such as novas, kilonovas, supernova, magnetars, quasars, gamma ray bursts are rarely visible from Earth. Under what conditions (such as distance, day vs. night, naked eye vs. level of ...
Michael's user avatar
  • 329
0 votes
1 answer
204 views

Do novas create a nebula? Could a planet survive if its star exploded in a nova?

Does a nova, caused by runaway fusion in hydrogen accreted onto a white dwarf from a companion star, create a visible nebula? If a planet were in a circumbinary orbit around a binary pair that ...
YottaEngineer's user avatar