A Caltech Library Service

A Substellar Common Proper-motion Companion to the Pleiad H II 1348

Gießler, Kerstin and Metchev, Stanimir A. and Pham, Alfonse and Larkin, James E. and McElwain, Michael and Hillenbrand, Lynne A. (2012) A Substellar Common Proper-motion Companion to the Pleiad H II 1348. Astrophysical Journal, 746 (1). Art. No. 44. ISSN 0004-637X.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


We announce the identification of a proper-motion companion to the star H II 1348, a K5 V member of the Pleiades open cluster. The existence of a faint point source 1farcs1 away from H II 1348 was previously known from adaptive optics imaging by Bouvier et al. However, because of a high likelihood of background star contamination and in the absence of follow-up astrometry, Bouvier et al. tentatively concluded that the candidate companion was not physically associated with H II 1348. We establish the proper-motion association of the pair from adaptive optics imaging with the Palomar 5 m telescope. Adaptive optics spectroscopy with the integral field spectrograph OSIRIS on the Keck 10 m telescope reveals that the companion has a spectral type of M8 ± 1. According to substellar evolution models, the M8 spectral type resides within the substellar mass regime at the age of the Pleiades. The primary itself is a known double-lined spectroscopic binary, which makes the resolved companion, H II 1348B, the least massive and widest component of this hierarchical triple system and the first substellar companion to a stellar primary in the Pleiades.

Item Type:Article
Related URLs:
URLURL TypeDescription
Metchev, Stanimir A.0000-0003-3050-8203
Larkin, James E.0000-0001-7687-3965
McElwain, Michael0000-0003-0241-8956
Additional Information:© 2012 American Astronomical Society. Received 2011 October 13; accepted 2011 December 7; published 2012 January 23. Partial support for S.A.M. was provided through the Spitzer Fellowship Program under award 1273192. The authors also wish to extend special thanks to those of Hawaiian ancestry on whose sacred mountain of Mauna Kea we are privileged to be guests. Facilities: Keck:II, Hale
Funding AgencyGrant Number
NASA Spitzer Fellowship1273192
Subject Keywords:binaries: visual; brown dwarfs; instrumentation: adaptive optics; stars: individual (Cl Melotte 22 1348); stars: low-mass
Issue or Number:1
Record Number:CaltechAUTHORS:20120522-140334989
Persistent URL:
Official Citation: A Substellar Common Proper-motion Companion to the Pleiad H II 1348 Kerstin Geißler et al. 2012 ApJ 746 44
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31600
Deposited By: Ruth Sustaita
Deposited On:22 May 2012 22:39
Last Modified:02 Nov 2019 22:34

Repository Staff Only: item control page