(cba:news) V1674 Her... once more with feeling! (Joe Patterson) [2022-04-08T10:53:24Z]

Hi CBAers,

                                                                  A 
recent ATel suggests that V1674 Her has "returned to quiescence".  I'm 
not sure exactly what the authors meant by this... maybe simply that the 
spectrum now resembles a CV rather than a nova.  But all of our data 
shows that it's still 3 magnitudes above quiescence, and exhibiting the 
same periodic phenomena which characterized the eruptive state (3.5 
hours and 8 minutes).  In particular, the pulsation period continues to 
speed up, as it did throughout 2021.

There's a lot of physics in that change of pulse period.  And it's all 
NEW physics.  Never before have we had a star with known pulse period 
*before* eruption, known pulse period ~10 days after eruption, and then 
continuously known dP/dt for the next 300 days (and counting).

Maybe when we have 10 TESSs and ZTFs, such things will be routine.  But 
it's all terra incognita now, and I earnestly hope you guys keep the 
time series coming!  It gets 4 minutes better every day... but even now, 
Hercules is well up in the morning sky.

We are just getting started on this amazing star... and I bet others 
are, too.  In the history of novae, I think it will take a high place in 
the pantheon, alongside DQ Her, T Pyx, and V1500 Cyg.

joe

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