Warm Neptune at HD 164595

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Warm Neptune at HD 164595

Post by Lazarus on 24th June 2015, 3:58 am

...and an update to the parameters of the GJ 777 A system.

Courcol et al. "The SOPHIE search for northern extrasolar planets VIII. A warm Neptune orbiting HD164595"
http://arxiv.org/abs/1506.07144
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Re: Warm Neptune at HD 164595

Post by Shellface on 26th June 2015, 5:25 pm

Impressive to see that SOPHIE is doing just as well as, if not better than HIRES after those upgrades. Having another ~1 m/s precision spectrograph is going to be useful, I imagine.

Given that such low-mass planets are often in multiple systems, it looks like there's a lot of room for extra planets in that system - particularly that (tentatively non-linear) trend. I expect we'll be seeing this name again within a few years.

And hey, good to see an update to HD 190360. It's one of the nearest systems with a long-period giant planet (52 light-years), so as we progress ever closer to imaging truly Jupiter-like planets, I expect HD 190360 b will be one of the first to be detected.

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Re: Warm Neptune at HD 164595

Post by Sirius_Alpha on 27th August 2016, 10:39 am

SETI has detected a signal from HD 164595. Unknown origin. Could be astrophysical noise. More monitoring required.
http://www.centauri-dreams.org/?p=36248

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Re: Warm Neptune at HD 164595

Post by Led_Zep on 27th August 2016, 10:48 am

CONTACT !!!

affraid
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Re: Warm Neptune at HD 164595

Post by matthew27 on 27th August 2016, 9:01 pm

Led_Zep wrote:CONTACT !!!

affraid

well, who said a gasses Neptune planet couldn't have technologically advanced life(If this signal were to turn out to be true). Very unexpected but the more we learn the stranger things become. What a Face

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Re: Warm Neptune at HD 164595

Post by Sirius_Alpha on 27th August 2016, 9:12 pm

It's also possible there's more planets in the system that haven't been detected...

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Re: Warm Neptune at HD 164595

Post by Stalker on 28th August 2016, 3:46 am

Or the signal is comming from another astrometricaly close star?

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Re: Warm Neptune at HD 164595

Post by tommi59 on 28th August 2016, 5:53 am

If they aliens are able to have ship size of a planet taking plasma from our sun that is no problem to remove hydrogen helium atmosphere from such warm Neptune Cool .Nevertheless any moon of such planet could be earth like
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Re: Warm Neptune at HD 164595

Post by Sirius_Alpha on 30th August 2016, 6:08 pm

Follow-up with the Green Bank Telescope fails to detect any evidence of the signal.

"The fact that they are not frequently seen in continuum imaging surveys suggests that the RATAN transient is likely due to instrumental interference or to some other artifact of human technology. While absence of evidence for extraterrestrial intelligence is by no means evidence of absence, our GBT observations did not detect ongoing emission from the direction of HD 164595 between 9.1 and 11.6 GHz to a sensitivity of ~10 mJy (10σ). Single-epoch transients are by their nature hard to confirm or deny, illustrating the need for confirming followup, either at a later time, or as part of the observing strategy (whether triggered follow-up of interesting sources, or some form of on-off observing). We intend to reobserve HD 164595 as part of the Breakthrough Listen target list, along with ongoing observations of targets selected using a range of criteria."
https://seti.berkeley.edu/HD164595.pdf

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Re: Warm Neptune at HD 164595

Post by rostronen on 28th September 2016, 7:26 am

The presentation of the "SETI signal" from HD 164595 by Claudio Maccone
in Guadalajara on Sep. 27 has been withdrawn..
All that is a deplorable stoty.

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