Feel The Beat: Black Hole’s Pulse Reveals Its Mysterious Size

There’s a bit of a mystery buried in the heart of the Cigar Galaxy, known more formally as M82 or Messier 82. Shining brightly in X-rays is a black hole (called M82 X-1) that straddles an unusual line between small and huge black holes, new research has revealed.

The new study reveals for the first time just how big this black hole is — about 400 times the mass of the sun — after about a decade of struggling to figure this out.

“Between the two extremes of stellar and supermassive black holes, it’s a real desert, with only about half a dozen objects whose inferred masses place them in the middle ground,” stated Tod Strohmayer, an astrophysicist at NASA’s Goddard Space Flight Center in Maryland.

Scientists figured this out by looking at changes in brightness in X-rays, which fluctuate according to how gas behaves as it falls towards a black hole. At the event horizon — that spot where you’re doomed, even if you’re light — is where the fluctuation happen most frequently. In general, larger black holes have these fluctuations less frequently, but they weren’t sure if this would apply to something that is of M82 X-1’s size.

But by going through old data from NASA’s Rossi X-ray Timing Explorer (RXTE) satellite — which ceased operations in 2012 — the scientists uncovered a similar pulsing relationship to what you see in larger black holes.

Specifically, they saw X-ray variations repeating 5.1 and 3.3 times a second, which is a similar 3:2 ratio to other black holes studied. This allows them to extend the measurement scale to this black hole, NASA stated.

Results of the study were published this week in Nature. The research was led by Dheeraj Pasham, a graduate student at the University of Maryland, College Park.

Source: NASA

Virtual Star Party – February 23, 2014 – Nebulae, Sunspots, and Planet “X”?!?

Hosts: Fraser Cain & Scott Lewis
Astronomers: David Dickinson, Gary Gonella, James McGee, Mike Simmons, Roy Salisbury, Shahrin Ahmad, Tom Nathe

Tonight’s views:
Jupiter with a nice view of the red spot, Venus approaching zenith, Bubble Nebula, the Pleiades, Orion Nebula, Horsehead Nebula, Flame Nebula, Running Man Nebula, the Moon, the Sun, the ISS (photo), the Rosette Nebula, Orion again, M33, Sunspots, Rosette again, California Nebula (multiple views), M81 & M82, Planet “X” (?!?), Andromeda, Flame Nebula again

We hold the Virtual Star Party every Sunday night as a live Google+ Hangout on Air. We begin the show when it gets dark on the West Coast. If you want to get a notification, make sure you circle the Virtual Star Party on Google+. You can watch on our YouTube channel or here on Universe Today.

Weekly Space Hangout – February 7, 2014: New Impact on Mars & A Wobbly Planet

Host: Fraser Cain
Astrojournalists: Scott Lewis, Nicole Gugliucci, Morgan Rehnberg, Brian Koberlein, Elizabeth Howell, Amy Shira Teitel, David Dickinson

This Week’s Stories!

Morgan Rehnberg (cosmicchatter.org / @cosmic_chatter):
New Mars impact crater

Nicole Gugliucci (cosmoquest.org / @noisyastronomer):
Weird Asteroid Itokawa Has a Dual Personality
Shiny new radio image of M82 (but no supernova afterglow)

David Dickinson (@astroguyz):
Venus in 2014
Progress+launches for February
Space History-Curious Artifacts Sent Into Space

Elizabeth Howell (@howellspace):
Astronomy Podcast Enters Sixth Year — And We’d Love For You To Contribute!
Super-Earths Could Be More ‘Superhabitable’ Than Planets Like Ours

Brian Koberlein (@briankoberlein); Scott Lewis (@baldastronomer); & Elizabeth Howell (@howellspace):
‘Wobbly’ Alien Planet Has Weird Seasons And Orbits Two Stars

Amy Shira Teitel (@astVintageSpace):
When galaxies collide!

Scott Lewis (@baldastronomer):
Gaia

We record the Weekly Space Hangout every Friday at 12:00 pm Pacific / 3:00 pm Eastern. You can watch us live on Google+, Universe Today, or the Universe Today YouTube page.

Supernova’s Galaxy Full Of Starbursts and ‘Superwind’

Radio light, radio bright: when you look at M82 in this frequency range, a whole lot of activity pops out. The “Cigar Galaxy” is just 12 million light-years away from Earth and these days, is best known for hosting a supernova or star explosion so bright that amateurs can spot it in a small telescope.

Take a big radio telescope and peer at the galaxy’s center, and a violent picture emerges. Bright star nurseries and supernova leftovers are visible in this image from the Karl G. Jansky Very Large Array (the scientists can tell those apart using other data from the telescope.)

“The radio emission seen here is produced by ionized gas and by fast-moving electrons interacting with the interstellar magnetic field,” the National Radio Astronomy Observatory stated.

Most intriguing to scientists in this picture are the streamers of material in this area of M82, which is about 5,200 light-years across in the pictured central region. These previously undetected “wispy features” could be related to “superwind” coming from all this stellar activity, but scientists are still examining the link.

By the way, Supernova SN 2014J is not visible in this image because it is not active in radio waves. You can check out optical pictures of it, however, at this past Universe Today story.

Source: National Radio Astronomy Observatory

Cloudy Weather Led To ‘Fluke’ M82 Supernova Discovery

In a rare example of cloudy weather helping astronomy rather than hurting it, the team that found M82’s new supernova swung a telescope in that direction only because their planned targets for the night were obscured, a release stated.

The exploding star in the “Cigar Galaxy” was found at 7:20 p.m. UTC (2:20 p.m. EST) during a class taught by Steve Fossey at the University of London Observatory. Students Ben Cooke, Tom Wright, Matthew Wilde and Guy Pollack all participated in the discovery.

“The weather was closing in, with increasing cloud,”  recalled Fossey in a press release, “so instead of the planned practical astronomy class, I gave the students an introductory demonstration of how to use the CCD camera on one of the observatory’s automated 0.35–metre [1.14-foot] telescopes.”

The new supernova in M82 captured by the 32-inch Schulman Telescope (RCOS) at the Mount Lemmon Sky Center in Arizona on January 23, 2014. Credit and copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona
The new supernova in M82 captured by the 32-inch Schulman Telescope (RCOS) at the Mount Lemmon Sky Center in Arizona on January 23, 2014. Credit and copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona

The students asked for M82, at which point Fossey saw a star that he couldn’t recall from examining the galaxy previously. A search of other images online revealed that something strange was happening, but clouds were obscuring everything quickly. The team focused on taking one- and two-minute exposures with different filters, and also using a second telescope to make sure there wasn’t something wrong with the first.

The team checked for any reports of a supernova, and finding none, Fossey sent a message to the International Astronomical Union’s Central Bureau for Astronomical Telegrams (which catalogs supernovae) and a United States team that does regular searches for exploding stars. Among his concerns was that it could be an asteroid lying in the way of the galaxy, but further spectroscopic measurements confirmed the “fluke” find, the release added.

The great thing about SN 2014J is it’s visible even in small telescopes. It’s also fairly close, by astronomical standards, at about 12 million light-years away. (The closest found since the invention of the telescope was Supernova 1987A, which exploded in February 1987 and was 168,000 light-years away.) Astrophotographers have already snapped many images of the exploding star.

“One minute we’re eating pizza, then five minutes later we’ve helped to discover a supernova,” stated Wright. “I couldn’t believe it. It reminds me why I got interested in astronomy in the first place.”

Source: University College London

More Great Images of Supernova 2014J Plus View it During Live Webcasts

Images keep pouring in of the biggest excitement in astronomy this week, a new Type Ia supernova in the Cigar Galaxy, 82, about 12 million light years away. As has been said, the Cigar got lit!

This is the closest supernova of this type since the 1800’s. Astrophotographers have been out in full force trying to nab this event, we’ve got more great images to share today, and we’ll keep adding them as they come in.

If you haven’t been able to take a look for yourself, you can join a live webcast from the folks at the Virtual Telescope Project on Saturday, January 25, 2014 at 20:30 UTC (3 pm EST, 1 pm PST), which you can watch here.

Plus, Fraser and the Virtual Star Party will surely try to nab M82 during their hangout on Sunday January 26 at 9 pm EST. Click the VSP link to find out when it starts in your time zone.

SN2014J on January 23, 2014, as seen from Rhode Island. Credit and copyright: Lloyd Merrill
SN2014J on January 23, 2014, as seen from Rhode Island. Credit and copyright: Lloyd Merrill
M82 with Supernova 2014J imaged on January 23, 2014. Credit and copyright: Anna Morris.
M82 with Supernova 2014J imaged on January 23, 2014. Credit and copyright: Anna Morris.
M82 and SN2014J as seen through a 6 inch telescope on January 23, 2014. Credit and copyright: Bill Magee.
M82 and SN2014J as seen through a 6 inch telescope on January 23, 2014. Credit and copyright: Bill Magee.
Before and after the supernova in M82. Credit and copyright: Astrokid96 on Flickr.
M82 and M81 imaged on January 23, 2014. Credit and copyright: Gregory Hogan.
M82 and M81 imaged on January 23, 2014. Credit and copyright: Gregory Hogan.
Comparison images of M82 nine months apart: on April 4, 2013 and January 23, 2014. Credit and copyright: Paul Campbell.

Want to get your astrophoto featured on Universe Today? Join our Flickr group or send us your images by email (this means you’re giving us permission to post them). Please explain what’s in the picture, when you took it, the equipment you used, etc.

Weekly Space Hangout – January 24, 2014: LEGO Mars Rover & the Supernova We Missed in the Star Party!

Host: Fraser Cain

Special Guests: Stephen Pakbaz, designer of the LEGO Mars Rover Kit, and Ray Sanders from CosmoQuest, who is unboxing and building the kit as we hang out!

Astrojournalists: Morgan Rehnberg, Sondy Springmann, Elizabeth Howell, Casey Dreier, David Dickinson, Nicole Gugliucci, Mike Simmons
Continue reading “Weekly Space Hangout – January 24, 2014: LEGO Mars Rover & the Supernova We Missed in the Star Party!”

Bright New Supernova Blows Up in Nearby M82, the Cigar Galaxy

Wow! Now here’s a supernova bright enough for even small telescope observers to see. And it’s in a bright galaxy in Ursa Major well placed for viewing during evening hours in the northern hemisphere. Doesn’t get much better than that! The new object was discovered last night by  S.J. Fossey; news of the outburst first appeared on the Central Bureau for Astronomical Telegrams “Transient Objects Confirmation Page”

An animation showing a comparison between the confirmation image of supernova in M82 by the team from the Remanzacco Observatory and archive image by a 2-meter telescope FTN - LCOGT from November 22, 2013.  Click on the image for a larger version. Credit: E. Guido, N. Howes, M. Nicolini.
An animation showing a comparison between the confirmation image of supernova in M82 by the team from the Remanzacco Observatory and archive image by a 2-meter telescope FTN – LCOGT from November 22, 2013. Click on the image for a larger version. Credit: E. Guido, N. Howes, M. Nicolini.

Astronomers are saying this new supernova is currently at magnitude +11 to +12, so its definitely not visible with the naked eye. You’ll need a 4 inch telescope at least to be able to see it. That said, at 12 million light years away, this is (at the moment) the brightest, closest supernova since SN 1993 J kaboomed in neighboring galaxy M81 21 years ago in 1993. M81 and M82, along with NGC 3077, form a close-knit interacting group.

Galaxy M81 with the new bright supernova photographed earlier today. Credit: Leonid Elenin
Another view of the galaxy M82 with the new bright supernova photographed earlier today. M82 glows at magnitude 8.4 and a popular object for telescopes of every size. Credit: Leonid Elenin

It’s amazing it wasn’t found and reported sooner (update — see below, as perhaps it was!). M82 is a popular target for beginning and amateur astronomers; pre-discovery observations show it had already brightened to magnitude 13.9 on the 16th, 13.3 on the 17th and 12.2 on the 19th. Cold winter weather and clouds to blame?

This is the starburst galaxy M82 imaged by Hubble in 2006, with approximate location of the new supernova noted. Image credit: NASA/ESA and the Hubble Heritage team, image notation by Jason Major.
This is the starburst galaxy M82 imaged by Hubble in 2006, with approximate location of the new supernova noted. Image credit: NASA/ESA and the Hubble Heritage team, image notation by Jason Major.

M82 is a bright, striking edge-on spiral galaxy bright enough to see in binoculars. Known as the Cigar or Starburst Galaxy because of its shape and a large, active starburst region in its core, it’s only 12 million light years from Earth and home to two previous supernovae in 2004 and 2008. Neither of those came anywhere close to the being as bright as the discovery, and it’s very possible the new object will become brighter yet.

Evolution of a Type Ia supernova. A superdense white dwarf star draws matter from a companion star, reaches a critical limit and then burns catastrophically. Credit: NASA/CXC/M. Weiss
Evolution of a Type Ia supernova. A superdense white dwarf star draws matter from a companion star, reaches a critical limit and then burns catastrophically. Credit: NASA/CXC/M. Weiss

PSN J09554214+6940260 is a Type Ia supernova. Type Ia (one-a), a dry term describing one of the most catastrophic events in the universe. Here a superdense white dwarf, a star only about the size of Earth but with the gravitational power of a sun-size star, pulls hydrogen gas from a nearby companion down to its surface where it adds to the star’s weight.

When the dwarf packs enough pounds to reach a mass 1.4 times that of the sun, it can no longer support itself. The star suddenly collapses, heats to incredible temperatures and burns up explosively in a runaway fusion reaction. What we see here on Earth is the sudden appearance of a brand new star within the galaxy’s disk. Of course, it’s not really a new star, but rather the end of an aged one.

This map shows the sky facing north-northeast at 8 p.m. local time in late January. The supernova is located about a fist above the Dipper Bowl in M82. Right next store is the equally bright M81 galaxy. It's easy to tell them apart. M81 is round with a bright core compared the streak-like appearance of M82. Stellarium
This map shows the sky facing north-northeast at 8 p.m. local time in late January. The supernova is located about a “fist” above the Dipper Bowl in M82. Right next door is the equally bright M81 galaxy. It’s easy to tell them apart. M81 is round with a bright core; M82 looks like a streak mark. See detailed map below. Stellarium

I know you’re as excited as I am to get a look at this spectacular new star the next clear night, so I’ve prepared a couple maps to help you find the galaxy. The best time to see the supernova is as soon as the sky gets dark when it’s already up in the northeastern sky above the Dipper Bowl, but since it’s circumpolar for mid-latitude observers, you can check it out any time of night.

To find M82, look about 7 degrees (not quite a fist held at arm's length) above the Bowl to find 23 UMa, an easy naked eye star. From there you can star hop to a little triangle and over to a pair of stars (the "line"). M82 and M81 are about half a degree below the line. Stellarium
To find M82, look about 7 degrees (not quite a fist held at arm’s length) above the Bowl to find 23 UMa, an easy naked eye star. From there you can star hop to a little triangle and over to a pair of stars (the “line”). M82 and M81 are about half a degree below the line. Stellarium

My maps show its position for around 8 o’clock. When you dial in the galaxy in your telescope, look for a starry point along its long axis west and south of the nucleus. All the fury of this fantastic blast is concentrated in that meek spark of light glimmering in the galactic haze.

Good  luck and enjoy watching one of the biggest show of fireworks the universe has to offer. We’ll keep you posted with the latest updates right here. For more photos and additional information, please see David Bishop’s excellent Latest Supernovae site. For charts with magnitudes to follow the supernova’s progress, visit the AAVSO’s Variable Star Plotter and type in ‘PSN J09554214+6940260’ for the star’s name.  You can read more about the followup work by the Remanzacco Observatory team here.

UPDATE: Sketch of M82 and its supernova, now designated SN 2014J, made at 9 p.m. CST Jan. 22 with a 15-inch (37 cm) telescope. A perfect arc of 3 stars (left) takes you right to it. The object is the only bright star shining in the galaxy. The supernova had brightened to about magnitude 11 at this time. Amazingly easy to see. Credit: Bob King
UPDATE: Sketch of M82 and its supernova, now designated SN 2014J, made at 9 p.m. CST Jan. 22 with a 15-inch (37 cm) telescope. A perfect arc of 3 stars (left) takes you right to it. The object is the only bright star shining in the galaxy. Amazingly easy to see. Numbers shown are magnitudes from the AAVSO – use them to help you gauge 2014J’s brightness changes. Credit: Bob King

UPDATE: Fraser and team from the Virtual Star Party actually imaged M82 on Sunday evening, and you can see it in the video below at the 22 minute mark. It really looks like a bright spot is showing up — and that’s about a day before it was announced. Did they catch it? In the video the galaxy appears upside down as compared to the images here:

UT reader Andrew Symes took a screenshot from the VSP, flipped it, and compared it with photo from Meineko Sakura from the Tao Astronomical Observatory it really appears the team caught the supernova before it was actually announced! Take a look:

Screenshot from the January 19 Virtual Star Party (right) compared to image from Meineko Sakura of the Tao Astronomical Observatory of the new supernova.
Screenshot from the January 19 Virtual Star Party (right) compared to image from Meineko Sakura of the Tao Astronomical Observatory of the new supernova.