MMT HYPERVELOCITY STAR SURVEY

نویسندگان
چکیده

برای دانلود رایگان 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

Mmt Hypervelocity Star Survey

We describe a new survey for unbound hypervelocity stars (HVSs), stars traveling with such extreme velocities that dynamical ejection from a massive black hole (MBH) is their most likely origin. We investigate the possible contribution of unbound runaway stars, and show that the physical properties of binaries constrain low mass runaways to bound velocities. We measure radial velocities for HVS...

متن کامل

The First Hypervelocity Star from the Lamost Survey

We report the first hypervelocity star (HVS) discovered from the LAMOST spectroscopic survey. It is a B-type star with a heliocentric radial velocity about 620 km s, which projects to a Galactocentric radial velocity component of ∼477 km s. With a heliocentric distance of ∼13 kpc and an apparent magnitude of ∼13 mag, it is the nearest bright HVS currently known. With a mass of ∼9M⊙, it is one o...

متن کامل

Hypervelocity Stars. I. the Spectroscopic Survey

We discuss our targeted search for hypervelocity stars (HVSs), stars traveling with velocities so extreme that dynamical ejection from a massive black hole is their only suggested origin. Our survey, now half complete, has successfully identified a total of four probable HVSs plus a number of other unusual objects. Here we report the most recently discovered two HVSs: SDSS J110557.45+093439.5 a...

متن کامل

A hypervelocity star from the Large Magellanic Cloud

We study the acceleration of the star HE 0437–5439 to hypervelocity and discuss its possible origin in the Large Magellanic Cloud (LMC). The star has a radial velocity of 723 km s and is located at a distance of 61 kpc from the Sun. With a mass of about 8M⊙, the travel time from the Galactic centre is of about 100Myr, much longer than its main sequence lifetime. Given the relatively small dista...

متن کامل

Hypervelocity Planets and Transits Around Hypervelocity Stars

Introduction: At the center of the Milky Way galaxy lies a black hole with mass ∼ 4× 106 that of the Sun. When a binary star system (two stars gravitationally bound to one another) approaches this massive black hole (MBH), the system can be tidally disrupted. This disruption can lead to the ejection of one star from the Milky Way at velocities of ∼ 1.5 million miles per hour. This is known as a...

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: 2008

ISSN: 0004-637X,1538-4357

DOI: 10.1088/0004-637x/690/2/1639