Strong Near-infrared Spectral Variability of the Young Cloudy L Dwarf Companion VHS J1256–1257 b

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Infrared spectroscopy of a brown dwarf companion candidate near the young star GSC 08047 - 00232 in Horologium

We present infrared Hand K-band spectra of a companion candidate 3 ′′ north of the young star GSC 08047-00232, a probable member of the nearby young Horologium association. From previously obtained JHK-band colors and the magnitude difference between primary and companion candidate, the latter could well be substellar (Neuhäuser et al. 2003) with the spectral type being roughly M7-L9 from the J...

متن کامل

Near-Infrared Spectral Classification of late-M and L Dwarfs

We present near-infrared (1 to 2.5 μm) low-resolution spectroscopy of eleven ultracool dwarfs with spectral types ranging from M7 to L8. Combining our observations with data published previously by Leggett et al. (2001), we have measured equivalent widths for the strongest atomic features and constructed narrowband indices to gauge the strength of the strongest molecular features. Those measure...

متن کامل

The Near-infrared Spectrum of the Brown Dwarf Gliese 229b

A medium resolution 1.0− 2.5 μm spectrum of the brown dwarf, Gliese 229B has been obtained using CGS4 on UKIRT. In addition to the broad spectral structure seen in earlier low resolution observations, the new spectrum reveals a large number of absorption lines, many of which can be identified with water vapor. Water and methane are both shown to be strong absorbers in the near-infrared spectrum...

متن کامل

The white dwarf companion to PSR B 0820 + 02 ?

We report new spectroscopic and photometric observations of the white dwarf companion to the pulsar PSR B0820+02. The white dwarf is a normal DA white dwarf with an effective temperature of 15000 K and a mass of 0.6 M . The mass and orbital period of this system confirm recent simulations of the evolution of a neutron star – main sequence binary with mass exchange and thus implicitely theoretic...

متن کامل

A Near-infrared Spectroscopic Study of the Accreting Magnetic White Dwarf Sdss J121209.31+013627.7 and Its Substellar Companion

The nature of the excess near-infrared emission associatedwith themagneticwhite dwarf commonly known as SDSS 1212 is investigated primarily through spectroscopy, and also via photometry. The inferred low-mass secondary in this system has been previously detected by the emission and variation of H , and the 1–2.5 m spectral data presented here are consistent with the presence of a late L or earl...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Astrophysical Journal

سال: 2020

ISSN: 2041-8213

DOI: 10.3847/2041-8213/ab8197