MAROON-X: An Earth-Finder Spectrograph for the Gemini Observatory

Jacob BeanUniversity of Chicasgo

Current Team: Andreas Seifahrt, Julian Stürmer, Ben Montet, Megan Bedell,Zachary RobertsonFormer Contributors: Leonardo dos Santos, Emily Gilbert, Adam Sutherland,Katrina Miller

Primary science driver: RV follow-up oftransiting, temperate, and terrestrial planetsthat are feasible targets for atmosphericspectroscopy.

Goal: σ = 1 m s-1 in <30 min for late M dwarfsout to 20 pc (V=17.0).

Approach: A highly-stabilized, fiber-fedspectrograph covering 500 – 900 nm at R=80kwith simultaneous calibration feed and pupilslicing.

Currently: Delivery of final componentsimminent, integration and lab testing ongoing,commissioning as a VI to begin in Q1 2019

New Radial Velocity Instrument for M Dwarfs at Gemini-N

TESS launch April 28, 2018

Transiting Exoplanet Survey Satellite

NASA Explorer Mission, 2018 – 2020

Searching 200,000+ stars over 75% of the sky

Will discover hundreds of transiting sub-Jovian size planets ideal for further characterization

Sullivan+ 2015

Based on Kepler statistics from Dressing & Charbonneau 2015

Why an optimized instrument on a large telescope?

NB: Typical V-K for a late M dwarf = 6

TESS Yield Simulations

MAROON-X discovery spacecapability of existing instruments

MAROON-X spectral bandpass

Simulations based on theoretical spectra validated against real dataSee also: Reiners+ 2010, 2018; Quirrenbach+ 2010; Rodler+ 2011; Bottom+ 2013

Kiwispec R4-100 spectrograph

2.1m1.2m

First light in the lab September 2016Design mostly described in Barnes+ 2012, SPIE

Kiwispec R4-100 spectrograph

Blue arm as builtRed arm under construction,

delivery in September--both arms share a common echelle grating--

Wavelength calibration: stabilized Fabry-Perot etalon

Wavelength calibration: stabilized Fabry-Perot etalonAstro Etalon ThAr

Stürmer+ 2017, JATIS

Astro Etalon 13 cm/s/day drift

Wavelength calibration: stabilized Fabry-Perot etalon

typical exposure time duration

temperatures

Microlens-array based pupil slicer and double scrambler

MAROON-X blue camera image format

sky fiber

3x sliced stellar spectra

simultaneous calibration

simulated data

engineering data

Echelle++ open source simulatorStürmer+ in prep

Radial velocity precision tests

Solar telescope for feeding Sun-as-a-star light24hr stability test

Installation at Gemini-North

Frontend unit recently completedPre-ship review scheduled for October, 2018

~30m fiber run from telescope to pier lab

Frontend installs at the position of NIRI/NIFS

Installation completed July 13, 2018

Thanks to John White, Eduardo Tapia, and Alison Peck!

Environmental control chamber in the Pier Lab

Project lead Andreas Seifahrt

Postdoc Julian Stürmer

Thanks to our generous sponsors and past and present team members!!!

For an overview see: Seifahrt+ 2018, SPIE in press, arXiv:1805.09276, and references therein