Young Star Caught Speeding Alyssa A Goodman HarvardSmithsonian

Young Star Caught Speeding Alyssa A. Goodman Harvard-Smithsonian Center for Astrophysics Héctor G. Arce Caltech

Star & Planet Formation Galaxy Molecular Cloud Complex Star-Forming “Globule” Star Cluster Disk + Jet Extrasolar System

How fast is “ 22 km/s”? 45, 000 miles per hour (45 x a speeding bullet) 10 -20 times faster than “most” stars move Most stars PV Ceph! 3 km/s Velocity compared to local environment 22 km/s

“Homeland” Exiled, but Accepted in New Land NGC 7023 Ocean of Emptiness PV Ceph “New Land”

Goodman & Arce 2004, Figure 1 3 light years Coming Soon PV Ceph: The Movie

What’s an “HH knot”? HH knots far from source mark the ends of bipolar “jets” or “outflows” Stanke, Mc. Caughrean & Zinnecker, 1999

Goodman & Arce 2004, Figure 1 3 light years Coming Soon PV Ceph: The Movie

Simulated Formation of a Star Cluster Bate, Bonnell & Bromm 2002

Optical Image of NGC 7023 Dust Emission Map “Exit wound” Tom Licha, 2002 Young Star Caught Speeding Away from Home Goodman & Arce 2004 NGC 7023 PV Ceph

“Immigration” Happens This discovery was a surprise. Underage stars can run away from home, fast! A proper “speeding study” is needed to understand what stars formed where, as a function of time.

Optical Image of NGC 7023 First Evidence for a Young Star moving at such High Speed far from a Cluster Dust Emission Map gap NGC 7023 PV Ceph Tom Licha, 2002 Young Star Caught Speeding Away from Home Speed=22 km/s Age=0. 5 million years Goodman & Arce 2004

Optical Image of NGC 7023 First Evidence for a Young Star moving at such High Speed far from a Cluster Dust Emission Map gap NGC 7023 PV Ceph Tom Licha, 2002 Young Star Caught Speeding Away from Home Speed=22 km/s Age=0. 5 million years Goodman & Arce 2004 Deceleration of Jets

Variability in “Gyulbudaghain's Nebula” (the fuzz surrounding PV Ceph) July ‘ 98 Oct/Nov ‘ 98 Oct ‘ 00 In 1 year, PV Ceph moves about the distance from the Sun to Jupiter (5 A. U. )