scholarly journals Science with EPICS, the E-ELT planet finder

2010 ◽  
Vol 6 (S276) ◽  
pp. 343-348
Author(s):  
Raffaele Gratton ◽  
Markus Kasper ◽  
Christophe Vérinaud ◽  
Mariangela Bonavita ◽  
Hans M. Schmid
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Large Telescope ◽  
High Performing ◽  
System A ◽  
Reflected Light ◽  
Integral Field Spectrograph ◽  
Adaptive Optics System ◽  
Integral Field

AbstractEPICS is the proposed planet finder for the European Extremely Large Telescope. EPICS is a high contrast imager based on a high performing extreme adaptive optics system, a diffraction suppression module, and two scientific instruments: an Integral Field Spectrograph (IFS) for the near infrared (0.95-1.65 μm), and a differential polarization imager (E-POL). Both these instruments should allow imaging and characterization of planets shining in reflected light, possibly down to Earth-size. A few high interesting science cases are presented.

scholarly journals CS Cha B: A disc-obscured M-type star mimicking a polarised planetary companion

2020 ◽  
Vol 640 ◽  
pp. L12
Author(s):  
S. Y. Haffert ◽  
R. G. van Holstein ◽  
C. Ginski ◽  
J. Brinchmann ◽  
I. A. G. Snellen ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Type Star ◽  
Atmospheric Models ◽  
Planetary Mass ◽  
Medium Resolution ◽  
Low Mass ◽  
Integral Field Spectrograph ◽  
Integral Field

Context. Direct imaging provides a steady flow of newly discovered giant planets and brown dwarf companions. These multi-object systems can provide information about the formation of low-mass companions in wide orbits and/or help us to speculate about possible migration scenarios. Accurate classification of companions is crucial for testing formation pathways. Aims. In this work we further characterise the recently discovered candidate for a planetary-mass companion CS Cha b and determine if it is still accreting. Methods. MUSE is a four-laser-adaptive-optics-assisted medium-resolution integral-field spectrograph in the optical part of the spectrum. We observed the CS Cha system to obtain the first spectrum of CS Cha b. The companion is characterised by modelling both the spectrum from 6300 Å to 9300 Å and the photometry using archival data from the visible to the near-infrared (NIR). Results. We find evidence of accretion and outflow signatures in Hα and OI emission. The atmospheric models with the highest likelihood indicate an effective temperature of 3450 ± 50 K with a log g of 3.6 ± 0.5 dex. Based on evolutionary models, we find that the majority of the object is obscured. We determine the mass of the faint companion with several methods to be between 0.07 M⊙ and 0.71 M⊙ with an accretion rate of Ṁ = 4 × 10−11±0.4 M⊙ yr−1. Conclusions. Our results show that CS Cha B is most likely a mid-M-type star that is obscured by a highly inclined disc, which has led to its previous classification using broadband NIR photometry as a planetary-mass companion. This shows that it is important and necessary to observe over a broad spectral range to constrain the nature of faint companions.

Adaptive optics systems for HARMONI: a visible and near-infrared integral field spectrograph for the E-ELT

2010 ◽  
Author(s):  
Thierry Fusco ◽  
Niranjan Thatte ◽  
Serge Meimon ◽  
Matthias Tecza ◽  
Fraser Clarke ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Integral Field Spectrograph ◽  
Integral Field

Control software for OSIRIS: an infrared integral-field spectrograph for the Keck adaptive optics system

2004 ◽  
Author(s):  
Jason L. Weiss ◽  
Matthew Barczys ◽  
James E. Larkin ◽  
Allan Honey ◽  
Michael W. McElwain ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Control Software ◽  
Integral Field Spectrograph ◽  
Adaptive Optics System ◽  
Integral Field

FRIDA: The infrared imager and integral field spectrograph for the adaptive optics system of GTC

2006 ◽  
Vol 50 (4-5) ◽  
pp. 389-391
Author(s):  
S. Cuevas ◽  
J.A. López ◽  
S. Eikenberry ◽  
B. Sánchez ◽  
A. Watson ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Infrared Imager ◽  
Integral Field Spectrograph ◽  
Adaptive Optics System ◽  
Integral Field

scholarly journals Evidence for an accreting massive black hole in He 2–10 from adaptive optics integral field spectroscopy

2020 ◽  
Vol 494 (2) ◽  
pp. 2004-2011 ◽  
Author(s):  
Rogemar A Riffel
Keyword(s):  
Black Hole ◽  
Adaptive Optics ◽  
Near Infrared ◽  
Dwarf Galaxy ◽  
Line Emission ◽  
Massive Black Hole ◽  
Star Forming ◽  
Star Forming Regions ◽  
Integral Field Spectrograph ◽  
Integral Field

ABSTRACT Henize 2–10 is a blue dwarf galaxy with intense star formation and one the most intriguing question about it is whether or not it hosts an accreting massive black hole. We use H and K-band integral field spectra of the inner 130 pc × 130 pc of He 2–10 to investigate the emission and kinematics of the gas at unprecedented spatial resolution. The observations were done using the Gemini Near-Infrared Integral Field Spectrograph (NIFS) operating with the ALTAIR adaptive optics module and the resulting spatial resolutions are 6.5 and 8.6 pc in the K and H bands, respectively. Most of the line emission is due to excitation of the gas by photoionization and shocks produced by the star forming regions. In addition, our data provide evidence of emission of gas excited by an active galactic nucleus located at the position of the radio and X-ray sources, as revealed by the analysis of the emission-line ratios. The emission lines from the ionized gas in the field present two kinematic components: one narrow with a velocity field suggesting a disc rotation and a broad component due to winds from the star forming regions. The molecular gas shows only the narrow component. The stellar velocity dispersion map presents an enhancement of about 7 km s−1 at the position of the black hole, consistent with a mass of $1.5^{+1.3}_{-1.3}\times 10^6$ M⊙.

scholarly journals Detection and characterization of two VLM binaries: LP 1033-31 and LP 877-72

2020 ◽  
Vol 498 (1) ◽  
pp. 737-749
Author(s):  
Subhajeet Karmakar ◽  
A S Rajpurohit ◽  
F Allard ◽  
D Homeier
Keyword(s):  
Adaptive Optics ◽  
Spectral Type ◽  
Near Infrared ◽  
Binding Energies ◽  
Secondary Component ◽  
Large Telescope ◽  
Very Large Telescope ◽  
Adaptive Optics Imaging ◽  
M Dwarf

ABSTRACT Using the high-resolution near-infrared adaptive optics imaging from the NaCo instrument at the Very Large Telescope, we report the discovery of a new binary companion to the M-dwarf LP 1033-31 and also confirm the binarity of LP 877-72. We have characterized both the stellar systems and estimated the properties of their individual components. We have found that LP 1033-31 AB with the spectral type of M4.5+M4.5 has a projected separation of 6.7 ± 1.3 AU. Whereas with the spectral type of M1+M4, the projected separation of LP 877-72 AB is estimated to be 45.8 ± 0.3 AU. The binary companions of LP 1033-31 AB are found to have similar masses, radii, effective temperatures, and log g with the estimated values of 0.20 ± 0.04 $\rm {M}_{\odot }$, 0.22 ± 0.03 $\rm {R}_{\odot }$, and 3200 K, 5.06 ± 0.04. However, the primary of LP 877-72 AB is found to be twice as massive as the secondary with the derived mass of 0.520 ± 0.006 $\rm {M}_{\odot }$. The radius and log g for the primary of LP 877-72 AB are found to be 1.8 and 0.95 times that of the secondary component with the estimated values of 0.492 ± 0.011 $\rm {R}_{\odot }$ and 4.768 ± 0.005, respectively. With an effective temperature of 3750 ± 15 K, the primary of LP 877-72 AB is also estimated to be ∼400 K hotter than the secondary component. We have also estimated the orbital period of LP 1033-31 and LP 877-72 to be ∼28 and ∼349 yr, respectively. The binding energies for both systems are found to be >1043 erg, which signifies that both systems are stable.

FRIDA: integral-field spectrograph and imager for the adaptive optics system of the Gran Telescopio Canarias

2006 ◽  
Author(s):  
J. A. López ◽  
V. Bringas ◽  
S. Cuevas ◽  
J. J. Díaz ◽  
S. S. Eikenberry ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Integral Field Spectrograph ◽  
Adaptive Optics System ◽  
Integral Field

A near infrared integral field spectrograph for the Southern African Large Telescope (SALT)

2018 ◽  
Author(s):  
Marsha J. Wolf ◽  
Douglas P. Adler ◽  
Matthew A. Bershady ◽  
Kurt P. Jaehnig ◽  
Ron J. Koch ◽  
...  
Keyword(s):  
Near Infrared ◽  
Large Telescope ◽  
Integral Field Spectrograph ◽  
Integral Field
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