S&T - Surf’s Up: Waves Might Be Breaking on This Star
W - Heartbeat star
Arxive - A star with a heartbeat & without a magnetic field discovered
Interesting, are there heartbeat stars in VSX? Maybe someone observes them?
Hmmm, noted in Wiki bright HD 74423 is presented in VSX as ACV:, but does not have UID. The star may has tidal heartbeat, however effect is almost invisible from backyard 
Hi Mikhail,
It is not a hearbeat, pulsations are not tidally-induced and the orbit is circular.
Thanks for calling our attention to it.
It has been revised in VSX.
1 Like
Hello Mikhail,
Yes this particular heartbeat would be nearly impossible to see from the ground. However, there are some that are much more visible. Stars like Iota Ori have a heartbeat of a couple of percent that can be seen from the ground. Also, I’m looking to start a project soon on what I’m calling Extreme Heartbeats. These look very much like heartbeats but have almost impossibly large amplitudes. A good example would be V0914 Car or HD 322956. They have periods that are months long, but can be seen from the ground. These are just a few examples, but VSX has quite the list.
Thanks,
Bert Pablo
Staff Astronomer, AAVSO
2 Likes
Thank you, Bert! I wish success to your project!
How to find tidal heartbit stars in VSX, what (sub)type of variability is used?
Hello Mikhail,
They have the variability type “HB” in VSX. I typically look for them by putting “HB%” in the variability type so it finds all HB with other variability types as well.
Thanks,
Let me recommend %HB% because there is a large number of EA+HB stars.
Cheers,
Sebastian
Of course, Bert and Sebastian are right, but simple HB seach clear shows how effect of tidal tsunami is small. Maybe, only exoplanets observers may detect some heartbits…
It will be interesting to know when HB type appeared in VSX. This type is not presented in GCVS and, truly speaking, I did not know it until S&T article.
Fortunately the nearest calculated minimum of ASAS J072332+0926.7 should be about 2026-01-01, which gives the opporrunity to observe (probable?) HB pulsation during current CMi season.
Proposal on BVR observations with AAVSOnet BSM was accepted, Sequence Team has prepared comp stars, and first points have been got already.
If someone would be interested by this object - please, join to the company!
1 Like
HI,
I have added it to my observing program in BVI filters.
Josch
1 Like
Thank you, Josch! Please, keep the star in your program until April, if possible.
I see, you use untransformed data, gotten with LesvePhotometry, but our BV points are close enough. If someone else will decide to participate - please, use AAVSO sequence presented on the image below. Maybe, check star 127 is not the best choise, but three nearest comps give low error with VPhot reduction.
It seems, rare heartbit of ASAS J072332+0926.7
should begin soon…
