בית     התחל מכאן     To Survive in the Universe    
Inhabited Sky
    News@Sky     תמונת אסטרו     האוסף     קבוצת דיון     Blog New!     שאלות נפוצות     עיתונות     כניסה  

TYC 6706-861-1


תוכן

תמונות

הוסף תמונה שלך

DSS Images   Other Images


מאמרים קשורים

Evidence of Possible Spin-orbit Misalignment Along the Line of Sight in Transiting Exoplanet Systems
Of the 26 transiting exoplanet systems with measurements of theRossiter-McLaughlin (RM) effect, eight have now been found to besignificantly spin-orbit misaligned in the plane of the sky (i.e., RMmisalignment angle |?| >~ 30° and inconsistent with? = 0°). Unfortunately, the RM effect does not constrain thecomplement misalignment angle between the orbit of the planet and thespin of its host star along the line of sight (LOS). I use a simplemodel of stellar rotation benchmarked with observational data tostatistically identify 10 exoplanet systems from a sample of 75 forwhich there is likely a significant degree of spin-orbit misalignmentalong the LOS: HAT-P-7, HAT-P-14, HAT-P-16, HD 17156, Kepler-5,Kepler-7, TrES-4, WASP-1, WASP-12, and WASP-14. All 10 systems have hoststellar masses M * in the range 1.2 M sun <~ M* <~ 1.5 M sun, and the probability of thisoccurrence by chance is less than one in ten thousand. In addition, theplanets in the candidate-misaligned systems are preferentially massiveand eccentric. The coupled distribution of misalignment from the RMeffect and from this analysis suggests that transiting exoplanets aremore likely to be spin-orbit aligned than expected given predictions fora transiting planet population produced entirely by planet-planetscattering or Kozai cycles and tidal friction. For that reason, thereare likely two populations of close-in exoplanet systems: a populationof aligned systems and a population of apparently misaligned systems inwhich the processes that lead to misalignment or to the survival ofmisaligned systems operate more efficiently in systems with massivestars and planets.

הכנס מאמר חדש


לינקים קשורים

  • - לא נמצאו לינקים -
הכנס לינק חדש


משמש של הקבוצה הבאה


תצפית ומידע אסטרומטרי

קבוצת-כוכבים:נחש מים
התרוממות ימנית:13h01m26.36s
סירוב:-27°31'20.0"
גודל גלוי:11.883
תנועה נכונה:-27
תנועה נכונה:-12.9
B-T magnitude:12.345
V-T magnitude:11.922

קטלוגים וכינוים:
שם עצם פרטי   (Edit)
TYCHO-2 2000TYC 6706-861-1
USNO-A2.0USNO-A2 0600-15334628

→ הזמן עוד קטלוגים וכינוים מוזיר