CoRoT Results

Page 17 of 17 Previous  1 ... 10 ... 15, 16, 17

View previous topic View next topic Go down

Re: CoRoT Results

Post by tommi59 on 25th September 2015, 3:51 am

No I do not think is good idea stalker in my opinion. We have and will have much more exoplanets so we do not need low mass stars as such brown dwarf to be exoplanet
avatar
tommi59
Jovian
Jovian

Number of posts : 547
Age : 39
Location : Baile Atha Cliath
Registration date : 2010-07-31

View user profile

Back to top Go down

Re: CoRoT Results

Post by Edasich on 25th September 2015, 4:23 am

Stalker wrote:It's a good idea.

Well in this case "exoplanet" count would increase notably, also acconting candidate BDs detected by timing around many cataclysmic variables, Algol and W UMa-type eclipsing binaries.
avatar
Edasich
dM star
dM star

Number of posts : 1516
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

Re: CoRoT Results

Post by Stalker on 25th September 2015, 11:43 am

There is already many "brown dwarf" (understand "burned deuterium in childhood") in EPE, because the limit planet/BD is at 20MJ, not 13MJ. You wont be able to tell the difference between a brown dwarf and a planet, because the deuterium burning take place during the contraction of the object and have almost no effect on its further Úvolution.

Personnally I separated EPE friendly planets, desert brown dwarfs and planetary mass companions in different counts, and many as nu Ophiuchi orbiting objets are obviously of planetary nature.

And I found only 77 true desert brown dwarf to date, thats not very much.

_________________
avatar
Stalker
Jovian
Jovian

Number of posts : 529
Age : 26
Location : Paris, France
Registration date : 2008-06-16

View user profile http://exoplanetes.wetpaint.com/

Back to top Go down

Re: CoRoT Results

Post by Stalker on 25th September 2015, 11:52 am

Some papers to read, breaking the borders between planets and brown dwarfs.

A Definition for Giant Planet Based on the Mass-Density Relationship

Nuclear Fusion in the Deuterated cores of inflated hot Jupiters

I think the way of birth is now more important than mass.

Some young planets have to be considered as low mass "stellar" object aka brown dwarfs, even if the mass is below deuterium burning limit (for example almost all youg wide separation compagnions discovered by imaging)

In other hand, all substellar objets born in a protoplanetary disc must be called a planet, even if in the youth, the planet burned deuterium... And may be Jupiter and Saturn did it in the past according to some models!

Of course it's my point of view, but I think we need to rethink our classification, just like what we did in 2006 in our solar system.

_________________
avatar
Stalker
Jovian
Jovian

Number of posts : 529
Age : 26
Location : Paris, France
Registration date : 2008-06-16

View user profile http://exoplanetes.wetpaint.com/

Back to top Go down

Re: CoRoT Results

Post by Edasich on 28th September 2015, 12:15 pm

So should WASP-30 B and other transiting/non-transiting epistellar brown dwarfs (to say, MARVELS-1 b, MARVELS-4 Ab, MARVELS-5 b AND MARVELS-6 b) be listed then.
avatar
Edasich
dM star
dM star

Number of posts : 1516
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

Re: CoRoT Results

Post by Stalker on 28th September 2015, 1:33 pm

If CoRoT-15 b is listed, then yes.

_________________
avatar
Stalker
Jovian
Jovian

Number of posts : 529
Age : 26
Location : Paris, France
Registration date : 2008-06-16

View user profile http://exoplanetes.wetpaint.com/

Back to top Go down

Re: CoRoT Results

Post by Edasich on 5th October 2015, 9:48 am

Another >30 Mj companion classed as planet at EPE: NLTT 41135 b

Should we open a separate thread concerning massive substellar object treated ad "exoplanets"? In case I'd move this reply there.
avatar
Edasich
dM star
dM star

Number of posts : 1516
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

Re: CoRoT Results

Post by Stalker on 5th October 2015, 2:52 pm

I think we should talk more about Brown dwarf in general on tais forum. :-)

_________________
avatar
Stalker
Jovian
Jovian

Number of posts : 529
Age : 26
Location : Paris, France
Registration date : 2008-06-16

View user profile http://exoplanetes.wetpaint.com/

Back to top Go down

Re: CoRoT Results

Post by Sirius_Alpha on 5th October 2015, 4:03 pm

Edasich wrote:Should we open a separate thread concerning massive substellar object treated ad "exoplanets"? In case I'd move this reply there.

I think that's a wonderful idea.

_________________
Caps Lock: Cruise control for 'Cool'!
avatar
Sirius_Alpha
Admin
Admin

Number of posts : 3493
Location : Earth
Registration date : 2008-04-06

View user profile http://solar-flux.forumandco.com/

Back to top Go down

Re: CoRoT Results

Post by Stalker on 6th October 2015, 4:42 pm

I propose "General brown dwarf news and discoveries"

_________________
avatar
Stalker
Jovian
Jovian

Number of posts : 529
Age : 26
Location : Paris, France
Registration date : 2008-06-16

View user profile http://exoplanetes.wetpaint.com/

Back to top Go down

Re: CoRoT Results

Post by Edasich on 31st October 2015, 5:17 am

Stalker wrote:I propose "General brown dwarf news and discoveries"

Another (imaged) brown dwarf added to planet list at EPE. Are we going to expand the "planet" concept?

http://exoplanet.eu/catalog/beta_cir_b/
avatar
Edasich
dM star
dM star

Number of posts : 1516
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

Re: CoRoT Results

Post by Lazarus on 2nd February 2016, 4:02 pm

Remember CoRoT-29b with the asymmetric transit? Follow-up observations find no asymmetry.

Palle et al. "The GTC exoplanet transit spectroscopy survey. IV.: No asymmetries in the transit of Corot-29b"
http://arxiv.org/abs/1602.00506

(arXiv preprint appears to suffer from some BibTeX errors, probably because the entire references section is missing)

While it is not impossible that both the CoRoT and the FTN data suffered from unfortunate instrumental effects causing a similar asymmetry, another explanation is that the poorly understood source of this asymmetry disappeared sometimes between 2012 and 2014.
avatar
Lazarus
dG star
dG star

Number of posts : 2842
Registration date : 2008-06-12

View user profile

Back to top Go down

Re: CoRoT Results

Post by Daniel on 20th July 2016, 1:24 pm

Corot Releases over 160,000 stars light curves in it's final legacy

http://idoc-corot.ias.u-psud.fr/sitools/client-user/COROT_N2_PUBLIC_DATA/project-index.html
avatar
Daniel
SuperEarth
SuperEarth

Number of posts : 238
Registration date : 2009-11-14

View user profile

Back to top Go down

Re: CoRoT Results

Post by Sirius_Alpha on 4th September 2017, 9:15 am

A modified CoRoT detrend algorithm and the discovery of a new planetary companion
https://arxiv.org/abs/1709.00351

We present MCDA, a modification of the CoRoT detrend algorithm (CDA) suitable to detrend chromatic light curves. By means of robust statistics and better handling of short term variability, the implementation decreases the systematic light curve variations and improves the detection of exoplanets when compared with the original algorithm. All CoRoT chromatic light curves (a total of 65,655) were analysed with our algorithm. Dozens of new transit candidates and all previously known CoRoT exoplanets were rediscovered in those light curves using a box-fitting algorithm. For three of the new cases spectroscopic measurements of the candidates' host stars were retrieved from the ESO Science Archive Facility and used to calculate stellar parameters and, in the best cases, radial velocities. In addition to our improved detrend technique we announce the discovery of a planet that orbits a 0.79+0.08−0.09R⊙ star with a period of 6.71837▒0.00001 days and has 0.57+0.06−0.05RJ and 0.15▒0.10MJ. We also present the analysis of two cases in which parameters found suggest the existence of possible planetary companions.

_________________
Caps Lock: Cruise control for 'Cool'!
avatar
Sirius_Alpha
Admin
Admin

Number of posts : 3493
Location : Earth
Registration date : 2008-04-06

View user profile http://solar-flux.forumandco.com/

Back to top Go down

Re: CoRoT Results

Post by Edasich on 4th September 2017, 10:22 am

avatar
Edasich
dM star
dM star

Number of posts : 1516
Location : Tau Ceti g - Mid Latitudes
Registration date : 2008-06-02

View user profile

Back to top Go down

Re: CoRoT Results

Post by Sponsored content


Sponsored content


Back to top Go down

Page 17 of 17 Previous  1 ... 10 ... 15, 16, 17

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum