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The Solar-Stellar Spectrograph (SSS) Project Review The Solar-Stellar Spectrograph (SSS) Project Review

The Solar-Stellar Spectrograph (SSS) Project Review - PowerPoint Presentation

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Uploaded On 2018-10-26

The Solar-Stellar Spectrograph (SSS) Project Review - PPT Presentation

JEFFREY HALL LOWELL OBSERVATORY FLAGSTAFF AZ Project Timeline 1988 1992 1996 2000 2004 2008 2012 Constructionearly observing Rebuild 1 Broad survey Solar analog survey Rebuild 2 AD boundary ID: 697908

mwo time sss stellar time mwo stellar sss series data analysis solar connecting apjs spectrum extraction observations usual 2007

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Slide1

The Solar-Stellar Spectrograph (SSS) Project Review

JEFFREY HALL

LOWELL OBSERVATORY, FLAGSTAFF, AZSlide2

Project Timeline

1988 1992 1996 2000 2004 2008 2012

Construction/early observing

Rebuild 1

Broad survey

Solar analog survey

Rebuild 2

A/D boundarySlide3

InstrumentationSlide4

Raw Data

1993-2007

2008-

λλ

3858-4012

λλ

3858-4012

λλ

5126-8973

with gaps

λλ

xxxx-xxxxwith gaps

Usual cadence:

Solar 3X/week Stellar 5-7 nights of bright time per month Slide5

Extracted SpectraSlide6

HK Spectrum Extraction and Analysis – 1

S

 log

R

HK

Δ

FHKSlide7

HK Spectrum Extraction and Analysis – 2 Slide8

HK Spectrum Extraction and Analysis – 3 Slide9

Time Series - SolarSlide10

Time Series - StellarSlide11

Time Series - StellarSlide12

Ensemble Behavior

No unambiguous detection of a stellar Maunder MinimumSlide13

Ensemble Behavior

General recovery of the usual activity-brightness relationshipsSlide14

Future DirectionsSlide15

Future Directions

Composite proxies beyond HK

yr

-1

powerSlide16

Connecting SSS to MWO – 1 Slide17

Connecting SSS to MWO – 2

We need a comprehensive linking, with individual observations and time series from other programs included.

Case study: the question of HD 3651Slide18

Connecting SSS to MWO – 2 Slide19

Connecting SSS to MWO – 2

Principal MWO data compilations available in the literature:

> Duncan et al. 1991

ApJS

76 383 > Baliunas et al. 1995

ApJ 438 269 (grand mean S, yearly mean S)

MWO time series for select stars >

Radick et al 1998 ApJS 118 239

> Lockwood et al 2007 ApJS 171 260

(grand mean S, yearly mean

S, individual observations)Data analysis formerly overseen by Donahue (1990s)Data currently curated by Soon