DOES A DIFFERENTIATED, CARBONATE-RICH, ROCKY OBJECT POLLUTE THE WHITE DWARF SDSS J104341.53+085558.2?

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

SDSS White Dwarf mass distribution at low effective temperatures

The DA white dwarfs in the Sloan Digital Sky Survey, as analyzed in the papers for Data Releases 1 and 4, show an increase in surface gravity towards lower effective temperatures below 11500 K. We study the various possible explanations of this effect, from a real increase of the masses to uncertainties or deficiencies of the atmospheric models. No definite answer is found but the tentative con...

متن کامل

The nature of the close magnetic white dwarf + probable brown dwarf binary SDSS

Optical time series photometry of the short period magnetic white dwarf + probable brown dwarf binary SDSS J121209.31 + 013627.7 reveals pulse-like variability in all bands from i to u, increasing towards bluer wavelengths and peaking at u. These modulations are most likely due to a self-eclipsing accretion hot spot on the white dwarf, rotating into view every 88.43 minutes. This period is comm...

متن کامل

Outliers from the Mass–Metallicity Relation I: A Sample of Metal-Rich Dwarf Galaxies from SDSS

We have identified a sample of 41 low-mass high–oxygen abundance outliers from the mass–metallicity relation of star-forming galaxies measured by Tremonti et al. (2004). These galaxies, which have 8.6 < 12 + log(O/H) < 9.3 over a range of −14.4 > MB > −19.1 and 7.4 < log(M⋆/M⊙) < 10, are surprisingly non-pathological. They have typical specific star formation rates, they are fairly isolated and...

متن کامل

SDSS J 150722 . 30 + 523039 . 8 : a CV formed directly from a detached white dwarf / brown dwarf binary ?

We present high-speed, three-colour photometry of the eclipsing cataclysmic variable SDSS J150722.30+523039.8 (hereafter SDSS J1507). This system has an orbital period of 66.61 minutes, placing it below the observed “period minimum” for cataclysmic variables. We determine the system parameters via a parameterised model of the eclipse fitted to the observed lightcurve by χ minimisation. We obtai...

متن کامل

The nature of the close magnetic white dwarf + probable brown dwarf binary SDSS J 121209 . 31 + 013627 . 7 ⋆

Optical time series photometry of the short period magnetic white dwarf + probable brown dwarf binary SDSS J121209.31 + 013627.7 reveals pulse-like variability in all bands from i to u, increasing towards bluer wavelengths and peaking at u. These modulations are most likely due to a self-eclipsing accretion hot spot on the white dwarf, rotating into view every 88.43 minutes. This period is comm...

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: 2016

ISSN: 1538-4357

DOI: 10.3847/1538-4357/834/1/1