Planet at 30 Arietis B?

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Planet at 30 Arietis B?

Post by Edasich on 5th October 2009, 4:04 am

A substellar component orbiting the F-star 30 Arietis B
E. W. Guenther, M. Hartmann, M. Esposito, A. P. Hatzes, F. Cusano, and D. Gandolfi
Accepted: 14 September 2009
DOI: 10.1051/0004-6361/200912112
PDF file (1.223 MB)

If someone has access, please notify
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Re: Planet at 30 Arietis B?

Post by Edasich on 13th October 2009, 4:07 am

I have downloaded discovery paper from athenaeum's library. I ask you permission before posting any information about the planet, in order to avoid possible embargo breach.
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Re: Planet at 30 Arietis B?

Post by Sirius_Alpha on 13th October 2009, 8:45 am

Is the paper publicly available?

Edit:
Yeah I guess it is, but behind a paywall. I'm truly unsure if posting it would be an embaro breach or not. There are those on this site that know more about that than I.

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Re: Planet at 30 Arietis B?

Post by Lazarus on 13th October 2009, 4:28 pm

It would almost certainly be a copyright violation to post the paper. I would suggest you don't do it.

Probably the paper will hit the arXiv at some point, if not when it is published it will probably be available through the Astronomy & Astrophysics Latest Articles Free service.
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Re: Planet at 30 Arietis B?

Post by Edasich on 14th October 2009, 4:08 am

Ok, then. I can figure out how your faces are turning green for envy because I have got the paper *lol*

Just kidding.
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Re: Planet at 30 Arietis B?

Post by Sirius_Alpha on 14th October 2009, 7:21 am

Not going to lie, I am indeed envious. Are the orbital parameters copyright?

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Re: Planet at 30 Arietis B?

Post by Lazarus on 14th October 2009, 3:24 pm

Probably not, but whether it's really worth putting them up when they'll be freely available post-publication via EPE is another matter. I'd personally recommend erring on the side of caution for now.
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Re: Planet at 30 Arietis B?

Post by Edasich on 27th November 2009, 6:05 am

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Re: Planet at 30 Arietis B?

Post by Lazarus on 27th November 2009, 2:24 pm

Thanks for the info! The paper is currently available via the Astronomy & Astrophysics Latest Articles Free service (link to the abstract here)
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Re: Planet at 30 Arietis B?

Post by Sirius_Alpha on 23rd December 2009, 9:12 pm

A substellar component orbiting the F-star 30 Ari B
http://arxiv.org/abs/0912.4619

Abstract wrote:CONTEXT: Most current radial velocity planet search programs have concentrated on stars of one solar mass. Our knowledge on the frequency of giant planets and brown dwarf companions to more massive stars is thus rather limited. In the case of solar-like stars, the frequency of short-period brown dwarf companions and very massive planets seems to be low. AIMS: Here we present evidence for a substellar companion to 30 Ari B, an F-star of 1.16 $\pm$ 0.04 $\rm M_\odot$ that is a member of a hierarchical triple system. METHODS: The companion was detected by means of precise radial velocity measurements using the 2-m Alfred-Jensch telescope and its 'echelle spectrograph. An iodine absorption cell provided the wavelength reference for precise stellar radial velocity measurements. RESULTS: We analyzed our radial velocity measurements and derived an orbit to the companion with period, P= 335.1+/-2.5 days, eccentricity e = 0.289+/-0.092, and mass function f(m) = (6.1+/-1.7)*10E-7 Modot. CONCLUSIONS: We conclude that the radial velocity variations of 30 Ari B are due to a companion with $m$ sin $i$ of $9.88\pm0.94$ $\rm M_{Jup}$ that is either a massive planet or a brown dwarf. {The object thus belongs to the rare class of massive planets and brown dwarfs orbiting main- sequence stars.

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Four-star planetary sytem 30 Ari

Post by Led_Zep on 4th March 2015, 6:27 pm

http://www.nasa.gov/jpl/planet-reared-by-four-parent-stars/

The newfound four-star planetary system, called 30 Ari, is located 136 light-years away in the constellation Aries. The system's gaseous planet is enormous, with 10 times the mass of Jupiter, and it orbits its primary star every 335 days. The primary star has a relatively close partner star, which the planet does not orbit. This pair, in turn, is locked in a long-distance orbit with another pair of stars about 1,670 astronomical units away (an astronomical unit is the distance between Earth and the sun). Astronomers think it's highly unlikely that this planet, or any moons that might circle it, could sustain life.



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Re: Planet at 30 Arietis B?

Post by Lazarus on 4th March 2015, 6:35 pm

Nice! (I guess the designations question is open)
Also HD 2638 turns out to be a triple system. My quick search of SIMBAD turned up no references to any stellar companions to HD 2638, so I guess both are new.
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Re: Planet at 30 Arietis B?

Post by Led_Zep on 4th March 2015, 7:16 pm

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Re: Planet at 30 Arietis B?

Post by Led_Zep on 4th March 2015, 10:32 pm

http://arxiv.org/abs/1503.01211

Know the Star, Know the Planet.
III. Discovery of Late-Type Companions to Two Exoplanet Host Stars


We discuss two multiple star systems that host known exoplanets: HD 2638 and 30 Ari B. Adaptive optics imagery revealed an additional stellar companion to both stars. We collected multi-epoch images of the systems with Robo-AO and the PALM-3000 adaptive optics systems at Palomar Observatory and provide relative photometry and astrometry. The astrometry indicates that the companions share common proper motion with their respective primaries. Both of the new companions have projected separations less than 30 AU from the exoplanet host star. Using the projected separations to compute orbital periods of the new stellar companions, HD 2638 has a period of 130 yrs and 30 Ari B has a period of 80 years. Previous studies have shown that the true period is most likely within a factor of three of these estimated values. The additional component to the 30 Ari makes it the second confirmed quadruple system known to host an exoplanet. HD 2638 hosts a hot Jupiter and the discovery of a new companion strengthens the connection between hot Jupiters and binary stars. We place the systems on a color-magnitude diagram and derive masses for the companions which turn out to be roughly 0.5 solar mass stars
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Re: Planet at 30 Arietis B?

Post by Sirius_Alpha on 5th March 2015, 2:36 am

Led_Zep wrote:I realize there' s a thread :
http://solar-flux.forumandco.com/t394-planet-at-30-arietis-b

Merged.

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Re: Planet at 30 Arietis B?

Post by Lazarus on 5th March 2015, 3:59 pm

HD 2638 is a bit of a mess... the A star is HD 2567, while HD 2638 comprises HD 2638 B (the planet host) and HD 2638 C. Finding a planet orbiting one of the close binary in a triple system is fairly rare, most of the time the planets in triple systems have been found around the distant tertiary star.
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