Sentences with phrase «spectral type»

Our followup spectroscopy has identified two new companions as well as confirmed two companions previously identified from photometry, with spectral types of M7.5 - M9 and masses of ~ 15 - 60 Mjup, indicating a frequency for such wide substellar companions of ~ 0.6 + / -0.3 %.

In consequence, this population will typically be of later spectral types, which presents lower fractions of binary systems (Lada 2006); hence the impact of false alarms from faint EBs is less for deeper samples.

By comparing their distribution with that of the Kepler Objects of Interest detected during the first six quarters of operation of the spacecraft, we infer the false positive rate of Kepler and study its dependence on spectral type, candidate planet size, and orbital period.

Moreover, this particular star is the same spectral type as Proxima Centauri, the Sun's nearest neighbor, which was shown to host at least one exoplanet, the famous Proxima b, in research published earlier this year.

The most favorable stars for disk detection are those with spectral types between A and K, while the statistics for debris disks detected around low - mass M - type stars is very low, either because they are rare or because they are more difficult to detect.

Our companions represent a selective subsample of promising candidates and span a range in spectral type of K7 - L9 with the addition of one DA white d... ▽ More We present the discovery of 61 wide (> 5 arcsecond) separation, low - mass (stellar and substellar) companions to stars in the solar neighborhood identified from Pan-STARRS \, 1 (PS1) data and the spectral classification of 27 previously known companions.

Woldemar Götz mentions this cluster as containing one peculiar Of star, an extremely hot bright star of spectral type O with peculiar spectral lines of ionized Helium and Nitrogen.

The library spans all the stellar types that are relevant to the integratedlight of old and intermediate - age stellar populations in the involved spectralregion (spectral types F through M and all luminosity classes).

Therefore an alternative to examining the nearest stars of the same spectral type as the sun is to examine the nearest galaxies.

The two components are of similar spectral types; the primary exhibits strong C III 4650 emission and is classified as an O6.5 Iafc supergiant, while the secondary is an O6 Iaf supergiant.

The L / T spectral type transition marks the transition from cloud - covered photospheres (L - type) to mostly cloud - free atmospheres (T - type).

The fraction of observed passive disks and the observed spectral type dependence can both be explained by models of disk evolution that include disk photoevaporation from the central star.

Chromospheric CA II H and K and H - alpha emission in single and binary stars of spectral types F6 - M2.

However, the Astronomiches Rechen - Institut at Heidelberg's ARICNS still identifies it as a orange - red dwarf star of spectral type K0.

Consequently, dust clouds are the dominant driver of the observed variability of ultra-cool dwarfs at spectral types at least as early as L0.

It orbits an aged, spectral type G star (KIC 11904151) of 0.895 Solar - mass and 1.06 Solar - diameter with around 1.00 Solar luminosity, which is estimated to be at least 7.4 billion years old.

On March 8, 2011, two astronomers analyzing the first four months of data from NASA's Kepler Mission submitted a pre-print with an initial estimate that the 1.4 (+ / - 0.5) to 2.7 (+ / - 0.9) percent of the Sun - like stars (of FGK spectral types) in the Kepler sample of nearly 155,500 may host Earth - and super-Earth sized planets with orbits within their host star's habitable zone (Catanzarite and Shao, 2011).

It is a solar - like main - sequence star with a similar yellowish colour, [31] whose stellar classification is spectral type G2 V. From the determined mutual orbital parameters, Alpha Centauri A is about 10 percent more massive than the Sun, with a radius about 22 percent larger.

Variability attributed to cloud structure already appears to be a persistent feature for L and T type field brown dwarfs, potentially due to the breakup of thick silicate and iron condensate clouds during the L to T spectral type transition.

We identify PSO J060.3200 +25.9644 (near - infrared spectral type L1) and PSO J077.1033 +24.3809 (L2) as new members of Taurus based on... ▽ More We present the discovery of eight young M7 - L2 dwarfs in the Taurus star - forming region and the Scorpius - Centaurus OB Association, serendipitously found during a wide - field search for L / T transition dwarfs using Pan-STARRS1 (optical) and WISE (mid-infrared) photometry.

We identify PSO J060.3200 +25.9644 (near - infrared spectral type L1) and PSO J077.1033 +24.3809 (L2) as new members of Taurus based on their VL - G gravity classifications, the consistency of their photometry and proper motions with previously known Taurus objects, and the low probability of contamination by field objects.

With a low mass, cool temperature, and very red colors, 2M0122 - 2439 B occupies a particularly important region of the substellar color - magnitude diagram by bridging the warm directly imaged hot planets with late - M / early - L spectral types (e.g. $ \ beta $ Pic b and ROXs 42Bb) and the cooler, dusty objects near the L / T transition (e.g. HR 8799bcde and 2MASS 1207b).

This companion object appears to have about four - tenths of Sol's mass according to Heintz (1996), which would correspond with a star around spectral type M3 (Mason et al, 1995).

Though a significant number of these astrometric matches are likely to be spurious, we sought out spectral characteristics of active stars and interacting binaries, such as hot, massive spectral types or emission lines in or... ▽ More We have conducted a near - infrared spectroscopic survey of 47 candidate counterparts to X-ray sources discovered by the Chandra X-ray Observatory near the Galactic Center (GC).

Previously classed as spectral type M4.5 e (with emission lines), the object was observed to be four times brighter than would be expected for a dim red dwarf of that type based on a revised parallax measurement of its distance from the Solar System (Ken Croswell, Science@Now, September 6, 2011).

Our catalog contains nearly all known objects of spectral types L0 - T2 in the PS1 field, with objects as early as M0 and as late as T9, and includes PS1, 2MASS, AllWISE, and Gaia DR1 photometry.

Their classification uses a different set of spectral types from element - burning «live» stars.

In addition, stars with surface temperatures of 3,300 kelvins or lower (red dwarfs of spectral type M2.5 such as Gliese 581, or redder) would emit so fewer photons towards the bluish wavelengths compared to Sol that the sky would appear whitish down to reddish to Human eyes (more from Earth Science Picture of the Day).

Seventy - nine of our objects have near - IR spectral types of L6 - T 4.5, the most L / T transition dwarfs from any search to date, and we have increased the census of L9 - T 1.5 objects within 25 pc by over 50 %.

The rotation periods delineate a tight sequence in the NGC6811 color - period diagram from ~ 1 day at mid-F to ~ 11 days at early - K spectral type.

Its colour and spectrum correspond roughly to spectral type A, with a surface temperature of about 25,000 K. Hence, the energy emission per unit area from the surface must be much greater than that of the Sun.

The hottest stars in M23 are of spectral type B9, the brightest star is of magnitude 9.21.

It is a main - sequence star of spectral type K1 V, making it more an orange colour than the primary star.

They can also be traced by the stars of the hotter spectral types, O, B, and A.

We obtained an X-Shooter spectra, with signal detectable from 0.8 to 2.3 micron, which confirmed a T7 spectral type with an enhanced Ks - band flux indicative of a potentially low - gravity, young, object.

The analysis of the medium resolution IRDIS long slit spectra also allowed a refinement of temperature and spectral type estimates.

I decided to colour them by spectral type and size them by absolute magnitude.

The latest brown dwarf proposed for the Y spectral type, WISE 1828 +2650, is a > Y2 dwarf with an effective temperature originally estimated around 300 K, the temperature of the human body.

For example, 59 Cygni is listed as spectral type B1.5 Vnne, [34] indicating a spectrum with the general classification B1.5 V, as well as very broad absorption lines and certain emission lines.

Class D is further divided into spectral types DA, DB, DC, DO, DQ, DX, and DZ.

Several spectral types, all previously used for non-standard stars in the mid-20th century, have been replaced during revisions of the stellar classification system.

Theta1 B, also known as BM Orionis, is another eclipsing binary, spectral type B2 - B3, with a period of 6.471 days and a magnitude range of 7.90 to 8.65.

The new spectral types L, T, and Y were created to classify infrared spectra of cool stars.