Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

28 March 2024
 
  » arxiv » astro-ph/0209144

 Article overview


Infrared imaging and spectroscopy of companion candidates near the young stars HD 199143 and HD 358623 in Capricornius
Ralph Neuhaeuser ; Eike Guenther ; Markus Mugrauer ; Thomas Ott ; Andreas Eckart ;
Date 9 Sep 2002
Journal Astron.Astrophys. 395 (2002) 877-884
Subject astro-ph
AffiliationMPE Garching), Eike Guenther (TLS Tautenburg), Markus Mugrauer, Thomas Ott (MPE Garching), Andreas Eckart (Uni Koeln
AbstractWe present JHK images of the young (~20 Myrs) nearby (~48 pc) stars HD 199143 and HD 358623 to search for (sub-)stellar companions around them. The images were obtained in JHK with the speckle camera SHARP-I in July 2001 and in H with SofI in Dec 2000, July 2001, and Dec 2001, all at the ESO 3.5m NTT. We present a companion candidate with a 2 arc sec offset being almost 2 mag fainter than HD 358623 with proper motion consistent with the known proper motion of the primary star HD 358623 A. Then, we obtained a spectrum in the H-band (with SofI at the NTT) of this companion showing that it has spectral type M1-3, consistent with being a companion of HD 358623 A (K7-M0). Also, a companion candidate with a 1 arcsecond offset being 2 mag fainter than HD 199143 is detected. The JHK colors of this candidate are consistent with a spectral type M0-2. We determine the ages and masses of all four objects from theoretical tracks and isochrones, all four stars appear to be co-eval with ~20 Myrs. Our limits for additional detectable but undetected companions are such that we would have detected all stellar companions with separations > 0.5 arc sec (24 AU at 48 pc).
Source arXiv, astro-ph/0209144
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica